Medha MEP 660. Troubleshooting Manual (2008)

PARAMETER

DESCRIPTION

FAULT CODE

1094

FAULT MESSAGE

Field Shunting Contactor FS21/FS24 Circuit Open.

RESTRICTIONS

Field Shunting Prohibited, Motoring in PARALLEL Prohibited

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when master handle is brought to IDLE. Auto fault recovery

RECOVERY

is permitted for 3 times in an hour. There after manual reset is

required.

PROBABLE

1. Defective FS21 or FS24 contactors. (Not picking up).

CAUSES

2. Open circuited FSR21 or FSR24 resistor panels.

3. Disconnected/burnt FSR cables.

FAULT

1. Set the display mode to ‘Manual Test for Outputs’ available under

ISOLATION

Test Mode menu option in the main menu.

2. To test FSR relay operation, enter 24 and press ‘Enter’ key.

3. Press 1 to energise FSR relay. FSR relay energises.

4. FSFB status Green LED 10 on the digital input card 4 MDIP16 in slot

12 should glow. FS contactors also should pick up.

5. Check the status of FS21 and FS24 contactors.

6. If the contactors are not picking up, check the Voltage between

wire 13 at FSR interlock and locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13 wire connected

to FSR interlock.

7. If the voltage is more than 65V, check the voltage between wire

FS1 at the FSR interlock and locomotive 4 wire.

A. If the voltage is zero, the interlock is bad. Replace the FSRrelay.

8. If the voltage is more than 65V, check the voltage between wire

FS1 at FS contactor coil and locomotive 4 wire.

A. If the voltage is zero, the wire FS1 from FSR relay interlock to

FS21 coil is open circuited. Replace the loop.

9. If the voltage is more than 65V, check the voltage across FS21 coil

terminals.

A. If the voltage is zero, the 4 wire connected to FS21 coil is open

circuited. Check the continuity of 4 wire connected to FS

contactor coils.

10. If the voltage is more than 65V, and FS contactor is not picking up,

the FS contactor is defective. Replace the FS contactor.

11. If FS24 alone not picking up,

A. the loop wires of either FS1 or 4 might have open circuited.

Check and replace.

B. The operating coil might be defective. Replace the FS contactor.

12. Check the FSR cables connected between REV and FS contactors for

any open circuit. If any replace the open circuited cables.

13. Check the FSR cables connected between FS contactors and FSR

resistors. Replace any open circuited cables.

14. Check FSR resistors. Replace any open circuited FSRs.

PARAMETER

DESCRIPTION

FAULT CODE

1095

FAULT MESSAGE

Field Shunting Contactor FS22/FS25 Circuit Open.

RESTRICTIONS

Field Shunting Prohibited, Motoring in PARALLEL Prohibited

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when master handle is brought to IDLE. Auto fault recovery

RECOVERY

is permitted for 3 times in an hour. There after manual reset is

required.

PROBABLE

1. Defective FS22 or FS25 contactors. (Not picking up).

CAUSES

2. Open circuited FSR22 or FSR25 resistor panels.

3. Disconnected/burnt FSR cables.

FAULT

1. Set the display mode to ‘Manual Test for Outputs’ available under

ISOLATION

Test Mode menu option in the main menu.

2. To test FSR relay operation, enter 24 and press ‘Enter’ key.

3. Press 1 to energise FSR relay. FSR relay energises.

4. FSFB status Green LED 10 on the digital input card 4 MDIP16 in slot

12 should glow. FS contactors also should pick up.

5. Check the status of FS22 and FS25 contactors.

6. If the contactors are not picking up, check the Voltage between

wire 13 at FSR interlock and locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13 wire connected

to FSR interlock.

7. If the voltage is more than 65V, check the voltage between wire

FS2 at the FSR interlock and locomotive 4 wire.

A. If the voltage is zero, the interlock is bad. Replace the FSRrelay.

8. If the voltage is more than 65V, check the voltage between wire

FS2 at FS contactor coil and locomotive 4 wire.

A. If the voltage is zero, the wire FS2 from FSR relay interlock to

FS22 coil is open circuited. Replace the loop.

9. If the voltage is more than 65V, check the voltage across FS22 coil

terminals.

A. If the voltage is zero, the 4 wire connected to FS22 coil is open

circuited. Check the continuity of 4 wire connected to FS

contactor coils.

10. If the voltage is more than 65V, and FS contactor is not picking up,

the FS contactor is defective. Replace the FS contactor.

11. If FS25 alone not picking up,

A. The loop wires of either FS2 or 4 might have open circuited.

Check and replace.

B. The operating coil might be defective. Replace the FS contactor.

12. Check the FSR cables connected between REV and FS contactors for

any open circuit. If any replace the open circuited cables.

13. Check the FSR cables connected between FS contactors and FSR

resistors. Replace any open circuited cables.

14. Check FSR resistors. Replace any open circuited FSRs.

100

PARAMETER

DESCRIPTION

FAULT CODE

1096

FAULT MESSAGE

Field Shunting Contactor FS23/FS26 Circuit Open.

RESTRICTIONS

Field Shunting Prohibited, Motoring in PARALLEL Prohibited

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when master handle is brought to IDLE. Auto fault recovery

RECOVERY

is permitted for 3 times in an hour. There after manual reset is

required.

PROBABLE

1. Defective FS21 or FS24 contactors. (Not picking up).

CAUSES

2. Open circuited FSR23 or FSR26 resistor panels.

3. Disconnected/burnt FSR cables.

FAULT

1. Set the display mode to ‘Manual Test for Outputs’ available under

ISOLATION

Test Mode menu option in the main menu.

2. To test FSR relay operation, enter 24 and press ‘Enter’ key.

3. Press 1 to energise FSR relay. FSR relay energises.

4. FSFB status Green LED 10 on the digital input card 4 MDIP16 in slot

12 should glow. FS contactors also should pick up.

5. Check the status of FS23 and FS26 contactors.

6. If the contactors are not picking up, check the Voltage between

wire 13 at FSR interlock and locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13 wire connected

to FSR interlock.

7. If the voltage is more than 65V, check the voltage between wire

FS3 at the FSR interlock and locomotive 4 wire.

A. If the voltage is zero, the interlock is bad. Replace the FSRrelay.

8. If the voltage is more than 65V, check the voltage between wire

FS3 at FS contactor coil and locomotive 4 wire.

A. If the voltage is zero, the wire FS3 from FSR relay interlock to

FS23 coil is open circuited. Replace the loop.

9. If the voltage is more than 65V, check the voltage across FS23 coil

terminals.

A. If the voltage is zero, the 4 wire connected to FS23 coil is open

circuited. Check the continuity of 4 wire connected to FS

contactor coils.

10. If the voltage is more than 65V, and FS contactor is not picking up,

the FS contactor is defective. Replace the FS contactor.

11. If FS26 alone not picking up,

A. the loop wires of either FS1 or 4 might have open circuited.

Check and replace.

B. The operating coil might be defective. Replace the FS contactor.

12. Check the FSR cables connected between REV and FS contactors for

any open circuit. If any replace the open circuited cables.

13. Check the FSR cables connected between FS contactors and FSR

resistors. Replace any open circuited cables.

14. Check FSR resistors. Replace any open circuited FSRs.

102

PARAMETER

DESCRIPTION

FAULT CODE

1097

FAULT MESSAGE

Traction Alternator out put short ckt. fault

RESTRICTIONS

Motoring and dynamic brake prohibited

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when master handle is brought to IDLE. Auto fault recovery

RECOVERY

is permitted for 2 times in an hour. There after manual reset is

required.

PROBABLE

The message is logged whenever a short circuit is exhibited across

CAUSES

GA11 and GA2 terminals. The short circuit might be a momentary or a

permanent cause.

1. Fluttering of power contactor due to improper air supply and

causing momentary short circuit across GA11 & GA2.

Power contactor stuck in mid position momentary / permanent.

Defective wiring in the power circuit.

Momentary short across GA11 and GA2 cables due to any foreign

body in BKT/REV contactors.

Burnt / short circuited diodes in power rectifier.

FAULT

Check for any welded power contactors. If any power contactors

ISOLATION

are welded, check for the falowing defects.

A. Control air pressure is less. If so adjust to 5 Kgs./Sq.cm.

B. Check for air leakages in the pneumatic pipeline connected

to power contactor. If necessary replace the pneumatic pipe.

C. Replace the power contactor and ensure proper operation of

the power contactors.

If power contactors are not in welded condition, check for any

welded symptoms of PC welding on the tips. If welding symptoms

are found, replace the power contactor.

Run Auto / manual test for digital outputs and ensure that there are

no faults recorded on power contactors during self-test.

If any faults are logged, adjust the auxiliary contacts as per the

maintanance instructions on PC aux. Interlocks Docment No. IM-57

If Power contactor are in healthy condition, check for burnt / over

heated / flashed contacts on BKT / REV.

(Any metallic foreign

materials fallen on BKT can cause momentary short circuit).

If any burnt / over heated / flashed contacts in BKT / REV clean the

contacts and ensure proper operation of BKT / REV.

Reset the fault and set the loco to Motoring position and open the

1^st Notch, if TAAI is equals to sum of all TM currents it indicates the

faulty momentary and it is cleared.

If no TM currents are sensed check for any short circuit between

GA11 and GA2. Identify the short circuit and rectify.

104

PARAMETER

DESCRIPTION

FAULT CODE

1102

FAULT MESSAGE

P2 Stuck Closed without Aux Contact ON. Check if Contact welded.

RESTRICTIONS

Series Motoring &

Dynamic Braking.

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

RECOVERY

PROBABLE

1. Defective P2 contactor.

CAUSES

2. Defective aux. interlock of P2 contactor.

3. Defective wiring.

4. Defective TM1AI current sensor.

5. Defective MDIP16 card in slot no: 10.

FAULT

This message will log whenever Traction Motor 1 current is sensed

ISOLATION

through TM1AI but P2 contactor aux. interlock feed back is not sensed.

Due to delayed operation of contactor or contactor stuck in mid

position can cause the above fault.

Check the status of the P2 power contactor. If the contactor is

stuck in mid position replace the contactor.

If the contactor is normal,

A. Check the operation of the power contactor by manually

operating the magnetvalve. Ensue that the contactor is

operating freely with out any delay. If the contactor is sluggish

in operation replace the contactor.

B. Run manual test for the power contactor and ensure the

feedback is detected correctly by the system.

If the Feed back is not detected by the system in the manual test,

A. Check the status of green LED 6 on digital input card MDIP16 in

slot No.10. If the LED glows while the contactor is ON:

a. Then the MDIP16 card is defective. Replace the card.

B. If the green LED is not glowing while the contactor pick up,

check the volage between wires P2 FB and 4 wire.

C. If Voltage is mre than 65V, then the connector of cable ID: AU

is slack or the wire P2FB is open circuited. Identify and rectify.

If necessary replace the cable.

D. If voltage is zero, check the voltage between 51 and 4 at the

auxiliary contact of P2. If voltage is more than 65V, the Aux.

Cntact is bad. Replace the aux. Contacts of power contactor.

E. If the voltage is zero, wire loop of 51 wire is defective. Identify

and replace.

If every thing is normal, check the current of TM No.1 while

opening the first notch and set the display to wheel slip mode.

A. If the TM1 current is showing abnormally high as compared to

4^th TM current, check the currents in parallel operation.

B. Compare the TM1 current with all other TM currents.

C. If the TM1 current is abnormally high, replace the current

sensor of TM1.

Note: This fault can be sometimes transient. If no trouble is found,

105

PARAMETER

DESCRIPTION

FAULT CODE

1103

FAULT MESSAGE

P32 Stuck Closed without Aux Contact ON. Check if Contact welded.

RESTRICTIONS

Series Motoring &

Dynamic Braking.

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

RECOVERY

PROBABLE

1. Defective P32 contactor.

CAUSES

2. Defective aux. interlock of P32 contactor.

3. Defective wiring.

4. Defective TM2AI current sensor.

5. Defective MDIP16 card in slot no: 10.

FAULT

This message will log whenever Traction Motor 2 current is sensed

ISOLATION

through TM2AI but P32 contactor aux. interlock feed back is not

sensed. Due to delayed operation of contactor or contactor stuck in

mid position can cause the above fault.

Check the status of the P32 power contactor. If the contactor is

stuck in mid position replace the contactor.

If the contactor is normal,

A. Check the operation of the power contactor by manually

operating the magnetvalve. Ensue that the contactor is

operating freely with out any delay. If the contactor is sluggish

in operation replace the contactor.

B. Run manual test for the power contactor and ensure the

feedback is detected correctly by the system.

If the Feed back is not detected by the system in the manual test,

A. Check the status of green LED 8 on digital input card MDIP16 in

slot No.10. If the LED glows while the contactor is ON:

a. Then the MDIP16 card is defective. Replace the card.

B. If the green LED is not glowing while the contactor pick up,

check the volage between wires P32 FB and 4 wire.

C. If Voltage is mre than 65V, then the connector of cable ID: AU

is slack or the wire P32FB is open circuited. Identify and rectify.

If necessary replace the cable.

D. If voltage is zero, check the voltage between 51 and 4 at the

auxiliary contact of P32. If voltage is more than 65V, the Aux.

Cntact is bad. Replace the aux. Contacts of power contactor.

E. If the voltage is zero, wire loop of 51 wire is defective. Identify

and replace.

If every thing is normal, check the current of TM No.2 while

opening the first notch and set the display to wheel slip mode.

A. If the TM2 current is showing abnormally high as compared to

5^th TM current, check the currents in parallel operation.

B. Compare the TM2 current with all other TM currents.

C. If the TM2 current is abnormally high, replace the current

sensor of TM2.

107

PARAMETER

DESCRIPTION

FAULT CODE

1104

FAULT MESSAGE

P22 Stuck Closed without Aux Contact ON. Check if Contact welded.

RESTRICTIONS

Series Motoring &

Dynamic Braking.

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

RECOVERY

PROBABLE

1. Defective P22 contactor.

CAUSES

2. Defective aux. interlock of P22 contactor.

3. Defective wiring.

4. Defective TM3AI current sensor.

5. Defective MDIP16 card in slot no: 10.

FAULT

This message will log whenever Traction Motor 3 current is sensed

ISOLATION

through TM3AI but P22 contactor aux. interlock feed back is not

sensed. Due to delayed operation of contactor or contactor stuck in

mid position can cause the above fault.

Check the status of the P22 power contactor. If the contactor is

stuck in mid position replace the contactor.

If the contactor is normal,

A. Check the operation of the power contactor by manually

operating the magnetvalve. Ensue that the contactor is

operating freely with out any delay. If the contactor is sluggish

in operation replace the contactor.

B. Run manual test for the power contactor and ensure the

feedback is detected correctly by the system.

If the Feed back is not detected by the system in the manual test,

A. Check the status of green LED 7 on digital input card MDIP16 in

slot No.10. If the LED glows while the contactor is ON:

a. Then the MDIP16 card is defective. Replace the card.

B. If the green LED is not glowing while the contactor pick up,

check the volage between wires P22 FB and 4 wire.

C. If Voltage is mre than 65V, then the connector of cable ID: AU

is slack or the wire P22FB is open circuited. Identify and rectify.

If necessary replace the cable.

D. If voltage is zero, check the voltage between 51 and 4 at the

auxiliary contact of P22. If voltage is more than 65V, the Aux.

Cntact is bad. Replace the aux. Contacts of power contactor.

E. If the voltage is zero, wire loop of 51 wire is defective. Identify

and replace.

If every thing is normal, check the current of TM No.3 while

opening the first notch and set the display to wheel slip mode.

A. If the TM1 current is showing abnormally high as compared to

6^th TM current, check the currents in parallel operation.

B. Compare the TM3 current with all other TM currents.

C. If the TM3 current is abnormally high, replace the current

sensor of TM3.

109

PARAMETER

DESCRIPTION

FAULT CODE

1105

FAULT MESSAGE

P1 Stuck Closed without Aux Contact ON. Check if Contact welded.

RESTRICTIONS

Series Motoring &

Dynamic Braking.

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

RECOVERY

PROBABLE

1. Defective P1 contactor.

CAUSES

2. Defective aux. interlock of P1 contactor.

3. Defective wiring.

4. Defective TM4AI current sensor.

5. Defective MDIP16 card in slot no: 10.

FAULT

This message will log whenever Traction Motor 4 current is sensed

ISOLATION

through TM4AI but P1 contactor aux. interlock feed back is not sensed.

Due to delayed operation of contactor or contactor stuck in mid

position can cause the above fault.

Check the status of the P1 power contactor. If the contactor is

stuck in mid position replace the contactor.

If the contactor is normal,

A. Check the operation of the power contactor by manually

operating the magnetvalve. Ensue that the contactor is

operating freely with out any delay. If the contactor is sluggish

in operation replace the contactor.

B. Run manual test for the power contactor and ensure the

feedback is detected correctly by the system.

If the Feed back is not detected by the system in the manual test,

A. Check the status of green LED 3 on digital input card MDIP16 in

slot No.10. If the LED glows while the contactor is ON:

a. Then the MDIP16 card is defective. Replace the card.

B. If the green LED is not glowing while the contactor pick up,

check the volage between wires P1 FB and 4 wire.

C. If Voltage is mre than 65V, then the connector of cable ID: AU

is slack or the wire P1FB is open circuited. Identify and rectify.

If necessary replace the cable.

D. If voltage is zero, check the voltage between 51 and 4 at the

auxiliary contact of P1. If voltage is more than 65V, the Aux.

Cntact is bad. Replace the aux. Contacts of power contactor.

E. If the voltage is zero, wire loop of 51 wire is defective. Identify

and replace.

If every thing is normal, check the current of TM No.4 while

opening the first notch and set the display to wheel slip mode.

A. If the TM4 current is showing abnormally high as compared to

1st TM current, check the currents in parallel operation.

B. Compare the TM4 current with all other TM currents.

C. If the TM4 current is abnormally high, replace the current

sensor of TM4.

111

PARAMETER

DESCRIPTION

FAULT CODE

1106

FAULT MESSAGE

P31 Stuck Closed without Aux Contact ON. Check if Contact welded.

RESTRICTIONS

Series Motoring &

Dynamic Braking.

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

RECOVERY

PROBABLE

1. Defective P31 contactor.

CAUSES

2. Defective aux. interlock of P31 contactor.

3. Defective wiring.

4. Defective TM5AI current sensor.

5. Defective MDIP16 card in slot no: 10.

FAULT

This message will log whenever Traction Motor 5 current is sensed

ISOLATION

through TM5AI but P31 contactor aux. interlock feed back is not

sensed. Due to delayed operation of contactor or contactor stuck in

mid position can cause the above fault.

Check the status of the P31 power contactor. If the contactor is

stuck in mid position replace the contactor.

If the contactor is normal,

A. Check the operation of the power contactor by manually

operating the magnetvalve. Ensue that the contactor is

operating freely with out any delay. If the contactor is sluggish

in operation replace the contactor.

B. Run manual test for the power contactor and ensure the

feedback is detected correctly by the system.

If the Feed back is not detected by the system in the manual test,

A. Check the status of green LED 4 on digital input card MDIP16 in

slot No.10. If the LED glows while the contactor is ON:

a. Then the MDIP16 card is defective. Replace the card.

B. If the green LED is not glowing while the contactor pick up,

check the volage between wires P31 FB and 4 wire.

C. If Voltage is mre than 65V, then the connector of cable ID: AU

is slack or the wire P31FB is open circuited. Identify and rectify.

If necessary replace the cable.

D. If voltage is zero, check the voltage between 51 and 4 at the

auxiliary contact of P31. If voltage is more than 65V, the Aux.

Cntact is bad. Replace the aux. Contacts of power contactor.

E. If the voltage is zero, wire loop of 51 wire is defective. Identify

and replace.

If every thing is normal, check the current of TM No.5 while

opening the first notch and set the display to wheel slip mode.

A. If the TM5 current is showing abnormally high as compared to

2rd TM current, check the currents in parallel operation.

B. Compare the TM5 current with all other TM currents.

C. If the TM5 current is abnormally high, replace the current

sensor of TM5.

113

PARAMETER

DESCRIPTION

FAULT CODE

1107

FAULT MESSAGE

P21 Stuck Closed without Aux Contact ON. Check if Contact welded.

RESTRICTIONS

Series Motoring &

Dynamic Braking.

ALARM BELL

30 seconds

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

RECOVERY

PROBABLE

1. Defective P21 contactor.

CAUSES

2. Defective aux. interlock of P21 contactor.

3. Defective wiring.

4. Defective TM6AI current sensor.

5. Defective MDIP16 card in slot no: 10.

FAULT

This message will log whenever Traction Motor 6 current is sensed

ISOLATION

through TM6AI but P21 contactor aux. interlock feed back is not

sensed. Due to delayed operation of contactor or contactor stuck in

mid position can cause the above fault.

Check the status of the P21 power contactor. If the contactor is

stuck in mid position replace the contactor.

If the contactor is normal,

A. Check the operation of the power contactor by manually

operating the magnetvalve. Ensue that the contactor is

operating freely with out any delay. If the contactor is sluggish

in operation replace the contactor.

B. Run manual test for the power contactor and ensure the

feedback is detected correctly by the system.

If the Feed back is not detected by the system in the manual test,

A. Check the status of green LED 5 on digital input card MDIP16 in

slot No.10. If the LED glows while the contactor is ON:

a. Then the MDIP16 card is defective. Replace the card.

B. If the green LED is not glowing while the contactor pick up,

check the volage between wires P21 FB and 4 wire.

C. If Voltage is mre than 65V, then the connector of cable ID: AU

is slack or the wire P21FB is open circuited. Identify and rectify.

If necessary replace the cable.

D. If voltage is zero, check the voltage between 51 and 4 at the

auxiliary contact of P21. If voltage is more than 65V, the Aux.

Cntact is bad. Replace the aux. Contacts of power contactor.

E. If the voltage is zero, wire loop of 51 wire is defective. Identify

and replace.

If every thing is normal, check the current of TM No.6 while

opening the first notch and set the display to wheel slip mode.

A. If the TM6 current is showing abnormally high as compared to

3rd TM current, check the currents in parallel operation.

B. Compare the TM6 current with all other TM currents.

C. If the TM6 current is abnormally high, replace the current

sensor of TM6.

115

3.0. MEDIUM PRIORITY FAULTS

PARAMETER

DESCRIPTION

FAULT CODE

1118

FAULT MESSAGE

Excess Traction Motor 1 Current. Maximum TM current limited.

RESTRICTIONS

Maximum TM Current LIMITED.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when traction motors get cooled.

RECOVERY

PROBABLE

1. Driver might have worked more time than the stipulated time in the

CAUSES

restricted zone of the load meter.

FAULT

1. The fault will get reset automatically.

ISOLATION

PARAMETER

DESCRIPTION

FAULT CODE

1119

FAULT MESSAGE

Excess Traction Motor 2 Current. Maximum TM current limited.

RESTRICTIONS

Maximum TM Current LIMITED.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when traction motors get cooled.

RECOVERY

PROBABLE

1. Driver might have worked more time than the stipulated time in the

CAUSES

restricted zone of the load meter.

FAULT

1. The fault will get reset automatically.

ISOLATION

117

PARAMETER

DESCRIPTION

FAULT CODE

1120

FAULT MESSAGE

Excess Traction Motor 3 Current. Maximum TM current limited.

RESTRICTIONS

Maximum TM Current LIMITED.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when traction motors get cooled.

RECOVERY

PROBABLE

1. Driver might have worked more time than the stipulated time in the

CAUSES

restricted zone of the load meter.

FAULT

1. The fault will get reset automatically.

ISOLATION

PARAMETER

DESCRIPTION

FAULT CODE

1121

FAULT MESSAGE

Excess Traction Motor 4 Current. Maximum TM current limited.

RESTRICTIONS

Maximum TM Current LIMITED.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when traction motors get cooled.

RECOVERY

PROBABLE

1. Driver might have worked more time than the stipulated time in the

CAUSES

restricted zone of the load meter.

FAULT

1. The fault will get reset automatically.

ISOLATION

118

PARAMETER

DESCRIPTION

FAULT CODE

1122

FAULT MESSAGE

Excess Traction Motor 5 Current. Maximum TM current limited.

RESTRICTIONS

Maximum TM Current LIMITED.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when traction motors get cooled.

RECOVERY

PROBABLE

1. Driver might have worked more time than the stipulated time in the

CAUSES

restricted zone of the load meter.

FAULT

1. The fault will get reset automatically.

ISOLATION

PARAMETER

DESCRIPTION

FAULT CODE

1123

FAULT MESSAGE

Excess Traction Motor 6 Current. Maximum TM current limited.

RESTRICTIONS

Maximum TM Current LIMITED.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when traction motors get cooled.

RECOVERY

PROBABLE

1. Driver might have worked more time than the stipulated time in the

CAUSES

restricted zone of the load meter.

FAULT

1. The fault will get reset automatically.

ISOLATION

119

PARAMETER

DESCRIPTION

FAULT CODE

1124

FAULT MESSAGE

S1 stuck open. Run Auto/manual test.

Power Limited. Power circuit problem

RESTRICTIONS

Reference power is reduced by 1/3 times of such faults while motoring

in 2S-3P mode.

Dynamic brake prohibited.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when S1 power contactor closes.

RECOVERY

PROBABLE

1. Defective power contactor.

CAUSES

2. Bad wiring.

3. Slackness in connector of cable ID: AY at MEP-660.

4. Defective digital output card MLSD 16 in slot 14.

5. Slackness in connector of cable ID: AU at MEP-660

6. Defective digital input card MDIP 16 in slot 10.

FAULT

This fault will be logged due to delayed / sluggish operation of power

ISOLATION

contactors. The fault may not exist while troubleshooting. In such case

check and ensure that the power contactor is operating freely and the

auxiliary contact is having sufficient over travel and pressure.

Check and ensure control air pressure is 5Kg./Sq.Cm. If control air

pressure is less/excess adjust to 5Kg./Sq./Cm.

Operate the power contactor manually by pressing armature plate

of the magnet valve.

If the power contactor is not operating:

A. Defective pneumatic pipeline. Check and replace the pipeline.

B. Defective magnet valve. Check and replace.

C. Defective power contactor. Check and replace.

If the power contactor is operating, set up the display to ‘Manual

Test for Outputs’ under ‘Test Mode’ menu option.

Enter 6 and press ‘Enter’ key to test S1 power contactor operation.

Press 1 to energise the S1 contactor.

If S1 is not picking up, check voltage at the power contactor

magnet valve terminals.

A. If the voltage is more than 65V, magnet valve coil is defective.

Replace the magnet valve.

If the voltage is zero, check voltage at coil terminal (wire 13) with

respect to locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to magnet valve coil. Check and replace open circuited

wire/wrong connection.

If the voltage is more than 60 V, Check the supply voltage between

loco wire 50 and magnet valve coil terminal S1CL.

A. If voltage is zero, there is no continuity of wire S1CL from MEP-

660 to magnet valve.

a) Check slackness of connector of (Cable ID: AY) at MEP-660. If

slack tighten the connector.

b) Check the continuity of S1CL wire from MEP-660 to magnet

120

valve coil terminal (Cable ID: AY, Pin-G). If necessary replace

the cable.

c) If the continuity is good and there is no slackness in

connector, then the digital output card MLSD 16 in slot No. 14

is defective. Replace the card.

10. If S1 is picking up, check the status of Green LED 9 on the digital

input card 2 in slot 10.

11. If the Green LED 9 is not glowing check Voltage at auxiliary contact

(wire No. 51) with respect to locomotive 4 wire.

A. If voltage is zero, check the continuity of 51-wire loop coming to

S1 power contactor auxiliary contact.

12. If voltage is more than 65V, then check voltage at auxiliary contact

(wire no. S1FB) with respect to locomotive 4 wire.

A. If voltage is zero, the auxiliary contact is bad. Replace the

auxiliary contacts.

13. If voltage is more than 60 V,

A. Check the slackness of connector of cable ID: AU at MEP-660. If

slack tighten and check the LED status.

B. Check the continuity of Wire S1FB from S1 power contactor to

MEP-660. (Cable ID: AU, Pin-K). If necessary replace the cable.

14. If the Green LED 9 is glowing:

A. Check the status of corresponding Yellow LED on the same card.

B. If the yellow LED is not glowing, then the digital input card MDIP

16 in slot No. 10 is defective. Replace the card and check.

15. If Both Green and Yellow LEDs 9 are glowing on the digital input

card MDIP 16 in slot 10, the feed back status should be displayed

ON. Toggle the S1 contactor operation two to three times and

ensure the feedback signal is changing accordingly.

121

PARAMETER

DESCRIPTION

FAULT CODE

1125

FAULT MESSAGE

S21 stuck open. Run Auto/manual test.

Power Limited. Power circuit problem

RESTRICTIONS

Reference power is reduced by 1/3 times of such faults while motoring

in 2S-3P mode.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when S21 power contactor closes.

RECOVERY

PROBABLE

1. Defective power contactor.

CAUSES

2. Bad wiring.

3. Slackness in connector of cable ID: AY at MEP-660.

4. Defective digital output card MLSD 16 in slot 14.

5. Slackness in connector of cable ID: AU at MEP-660

6. Defective digital input card MDIP 16 in slot 10.

FAULT

This fault will be logged due to delayed / sluggish operation of power

ISOLATION

contactors. The fault may not exist while troubleshooting. In such case

check and ensure that the power contactor is operating freely and the

auxiliary contact is having sufficient over travel and pressure.

Check and ensure control air pressure is 5Kg./Sq.Cm. If control air

pressure is less/excess adjust to 5Kg./Sq./Cm.

Operate the power contactor manually by pressing armature plate

of the magnet valve.

If the power contactor is not operating:

A. Defective pneumatic pipeline. Check and replace the pipeline.

B. Defective magnet valve. Check and replace.

C. Defective power contactor. Check and replace.

If the power contactor is operating, set up the display to ‘Manual

Test for Outputs’ under ‘Test Mode’ menu option.

Enter 7 and press ‘Enter’ key to test S21 power contactor

operation.

Press 1 to energise the S21 contactor.

If S21 is not picking up, check voltage at the power contactor

magnet valve terminals.

A. If the voltage is more than 65V, magnet valve coil is defective.

Replace the magnet valve.

If the voltage is zero, check voltage at coil terminal (wire 13) with

respect to locomotive 4-wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to magnet valve coil. Check and replace open circuited

wire/wrong connection.

If the voltage is more than 65 V, Check the supply voltage between

loco wire 50 and magnet valve coil terminal S21CL.

A. If voltage is zero, there is no continuity of wire S21CL from

MEP-660 to magnet valve.

a) Check slackness of connector of (Cable ID: AY) at MEP-660. If

slack tighten the connector.

b) Check the continuity of S21CL wire from MEP-660 to magnet

122

valve coil terminal (Cable ID: AY, Pin-H). If necessary replace

the cable.

c) If the continuity is good and there is no slackness in

connector, then the digital output card MLSD 16 in slot No. 14

is defective. Replace the card.

10. If S21 is picking up, check the status of Green LED 10 on the digital

input card 2 in slot 10.

11. If the Green LED 10 is not glowing, check supply Voltage at

auxiliary contact (wire No. 51) with respect to locomotive 4 wire.

A. If voltage is zero, check the continuity of 51-wire loop coming to

S21 power contactor auxiliary contact.

12. If voltage is more than 65V, then check voltage at auxiliary contact

(wire no. S21FB) with respect to locomotive 4 wire.

A. If voltage is zero, the auxiliary contact is bad. Replace the

auxiliary contacts.

13. If voltage is more than 60 V,

A. Check the slackness of connector of cable ID: AU at MEP-660. If

slack tighten and check the LED status.

B. Check the continuity of Wire S21FB from S21 power contactor to

MEP-660. (Cable ID: AU, Pin-L). If necessary replace the cable.

14. If the Green LED 10 is glowing:

A. Check the status of corresponding Yellow LED on the same card.

B. If the yellow LED is not glowing, then the digital input card MDIP

16 in slot No. 10 is defective. Replace the card and check.

15. If Both Green and Yellow LEDs 10 are glowing on the digital input

card MDIP 16 in slot 10, the feed back status should be displayed

ON. Toggle the S21 contactor operation two to three times and

ensure the feedback signal is changing accordingly.

123

PARAMETER

DESCRIPTION

FAULT CODE

1126

FAULT MESSAGE

S31 stuck open. Run Auto/manual test.

Power Limited. Power circuit problem

RESTRICTIONS

Reference power is reduced by 1/3 times of such faults while motoring

in 2S-3P mode.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when S31 power contactor closes.

RECOVERY

PROBABLE

1. Defective power contactor.

CAUSES

2. Bad wiring.

3. Slackness in connector of cable ID: AY at MEP-660.

4. Defective digital output card MLSD 16 in slot 14.

5. Slackness in connector of cable ID: AU at MEP-660

6. Defective digital input card MDIP 16 in slot 10.

FAULT

This fault will be logged due to delayed / sluggish operation of power

ISOLATION

contactors. The fault may not exist while troubleshooting. In such case

check and ensure that the power contactor is operating freely and the

auxiliary contact is having sufficient over travel and pressure.

Check and ensure control air pressure is 5Kg./Sq.Cm. If control air

pressure is less/excess adjust to 5Kg./Sq./Cm.

Operate the power contactor manually by pressing armature plate

of the magnet valve.

If the power contctor is not operating:

A. Defective pneumatic pipeline. Check and replace the pipeline.

B. Defective magnet valve. Check and replace.

C. Defective power contactor. Check and replace.

If the power contactor is operating, set up the display to ‘Manual

Test for Outputs’ under ‘Test Mode’ menu option.

Enter 8 and press ‘Enter’ key to test S31 power contactor

operation.

Press 1 to energise the S31 contactor.

If S31 is not picking up, check voltage at the power contactor

magnet valve terminals.

A. If the voltage is more than 65V, magnet valve coil is defective.

Replace the magnet valve.

If the voltage is zero, check voltage at coil terminal (wire 13) with

respect to locomotive 4-wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to magnet valve coil. Check and replace open circuited

wire/wrong connection.

If the voltage is more than 60 V, Check the supply voltage between

loco wire 50 and magnet valve coil terminal S31CL.

A. If voltage is zero, there is no continuity of wire S31CL from

MEP-660 to magnet valve.

a) Check slackness of connector of (Cable ID: AY) at MEP-660. If

slack tighten the connector.

b) Check the continuity of S31CL wire from MEP-660 to magnet

124

valve coil terminal (Cable ID: AY, Pin-K). If necessary replace

the cable.

c) If the continuity is good and there is no slackness in

connector, then the digital output card MLSD 16 in slot No. 14

is defective. Replace the card.

10. If S31 is picking up, check the status of Green LED 11 on the digital

input card 2 in slot 10.

11. If the Green LED 11 is not glowing, check supplies Voltage at

auxiliary contact (wire No. 51) with respect to locomotive 4 wire.

A. If voltage is zero, check the continuity of 51-wire loop coming to

S31 power contactor auxiliary contact.

12. If voltage is more than 65V, then check voltage at auxiliary contact

(wire no. S31FB) with respect to locomotive 4 wire.

A. If voltage is zero, the auxiliary contact is bad. Replace the

auxiliary contacts.

13. If voltage is more than 60 V,

A. Check the slackness of connector of cable ID: AU at MEP-660. If

slack tighten and check the LED status.

B. Check the continuity of Wire S31FB from S31 power contactor to

MEP-660. (Cable ID: AU, Pin-M). If necessary replace the cable.

14. If the Green LED 11 is glowing:

A. Check the status of corresponding Yellow LED on the same card.

B. If the yellow LED is not glowing, then the digital input card MDIP

16 in slot No. 10 is defective. Replace the card and check.

15. If Both Green and Yellow LEDs 11 are glowing on the digital input

card MDIP 16 in slot 10, the feed back status should be displayed

ON. Toggle the S31 contactor operation two to three times and

ensure the feedback signal is changing accordingly.

125

PARAMETER

DESCRIPTION

FAULT CODE

1127

FAULT MESSAGE

P1 stuck open. Run Auto/manual test.

Power Limited. Power circuit problem

RESTRICTIONS

Reference power is reduced by 1/6 times of such faults while motoring

in 6P mode.

Dynamic brake prohibited.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when P1 power contactor closes.

RECOVERY

PROBABLE

1. Defective power contactor.

CAUSES

2. Bad wiring.

3. Slackness in connector of cable ID: AY at MEP-660.

4. Defective digital output card MLSD 16 in slot 14.

5. Slackness in connector of cable ID: AU at MEP-660

6. Defective digital input card MDIP 16 in slot 10.

FAULT

This fault will be logged due to delayed / sluggish operation of power

ISOLATION

contactors. The fault may not exist while troubleshooting. In such case

check and ensure that the power contactor is operating freely and the

auxiliary contact is having sufficient over travel and pressure.

1. Check and ensure control air pressure is 5Kg./Sq.Cm. If control air

pressure is less/excess adjust to 5Kg./Sq./Cm.

2. Operate the power contactor manually by pressing armature plate

of the magnet valve.

3. If the power contactor is not operating:

A. Defective pneumatic pipeline. Check and replace the pipeline.

B. Defective magnet valve. Check and replace.

C. Defective power contactor. Check and replace.

4. If the power contactor is operating, set up the display to ‘Manual

Test for Outputs’ under ‘Test Mode’ menu option.

5. Enter 0 and press ‘Enter’ key to test P1 power contactor operation.

6. Press 1 to energise the P1 contactor.

7. If P1 is not picking up, check voltage at the power contactor

magnet valve terminals.

8. If the voltage is more than 65V, magnet valve coil is defective.

Replace the magnet valve.

A. If the voltage is zero, check voltage at coil terminal (wire 13)

with respect to locomotive 4-wire.

9. If the voltage is zero, check the continuity of 13-wire loop coming

to magnet valve coil. Check and replace open circuited wire/wrong

connection.

A. If the voltage is more than 60 V, Check the supply voltage

between loco wire 50 and magnet valve coil terminal P1CL.

10. If voltage is zero, there is no continuity of wire P1CL from MEP-660

to magnet valve.

A. Check slackness of connector of (Cable ID: AY) at MEP-660. If

slack tighten the connector.

B. Check the continuity of P1CL wire from MEP-660 to magnet

126

valve coil terminal (Cable ID: AY, Pin-A). If necessary replace

the cable.

C. If the continuity is good and there is no slackness in connector,

then the digital output card MLSD 16 in slot No. 14 is defective.

Replace the card.

11. If P1 is picking up, check the status of Green LED 3 on the digital

input card 2 in slot 10.

12. If the Green LED 3 is not glowing, check supply Voltage at auxiliary

contact (wire No. 51) with respect to locomotive 4 wire.

A. If voltage is zero, check the continuity of 51-wire loop coming to

P1 power contactor auxiliary contact.

13. If voltage is more than 65V, then check voltage at auxiliary contact

(wire no. P1FB) with respect to locomotive 4 wire.

A. If voltage is zero, the auxiliary contact is bad. Replace the

auxiliary contacts.

14. If voltage is more than 60 V,

A. Check the slackness of connector of cable ID: AU at MEP-660. If

slack tighten and check the LED status.

B. Check the continuity of Wire P1FB from P1 power contactor to

MEP-660. (Cable ID: AU, Pin-D). If necessary replace the cable.

15. If the Green LED 3 is glowing:

A. Check the status of corresponding Yellow LED on the same card.

B. If the yellow LED is not glowing, then the digital input card MDIP

16 in slot No. 10 is defective. Replace the card and check.

16. If Both Green and Yellow LEDs 3 are glowing on the digital input

card MDIP 16 in slot 10, the feed back status should be displayed

ON. Toggle the P1 contactor operation two to three times and

ensure the feedback signal is changing accordingly.

127

PARAMETER

DESCRIPTION

FAULT CODE

1128

FAULT MESSAGE

P21 stuck open. Run Auto/manual test.

Power Limited. Power circuit problem

RESTRICTIONS

Reference power is reduced by 1/6 times of such faults while motoring

in 6P mode.

Dynamic brake prohibited.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when P21 power contactor closes.

RECOVERY

PROBABLE

1. Defective power contactor.

CAUSES

2. Bad wiring.

3. Slackness in connector of cable ID: AY at MEP-660.

4. Defective digital output card MLSD 16 in slot 14.

5. Slackness in connector of cable ID: AU at MEP-660

6. Defective digital input card MDIP 16 in slot 10.

FAULT

This fault will be logged due to delayed / sluggish operation of power

ISOLATION

contactors. The fault may not exist while troubleshooting. In such case

check and ensure that the power contactor is operating freely and the

auxiliary contact is having sufficient over travel and pressure.

Check and ensure control air pressure is 5Kg./Sq.Cm. If control air

pressure is less/excess adjust to 5Kg./Sq./Cm.

Operate the power contactor manually by pressing armature plate

of the magnet valve.

If the power contactor is not operating:

A. Defective pneumatic pipeline. Check and replace the pipeline.

B. Defective magnet valve. Check and replace.

C. Defective power contactor. Check and replace.

If the power contactor is operating, set up the display to ‘Manual

Test for Outputs’ under ‘Test Mode’ menu option.

Enter 1 and press ‘Enter’ key to test P21 power contactor operation.

Press 1 to energise the P21 contactor.

If P21 is not picking up, check voltage at the power contactor

magnet valve terminals.

A. If the voltage is more than 65V, magnet valve coil is defective.

Replace the magnet valve.

If the voltage is zero, check voltage at coil terminal (wire 13) with

respect to locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to magnet valve coil. Check and replace open circuited

wire/wrong connection.

If the voltage is more than 60 V, Check the supply voltage between

loco wire 50 and magnet valve coil terminal P21CL.

A. If voltage is zero, there is no continuity of wire P21CL from MEP-

660 to magnet valve.

a) Check slackness of connector of (Cable ID: AY) at MEP-660. If

slack tighten the connector.

b) Check the continuity of P21CL wire from MEP-660 to magnet

128

valve coil terminal (Cable ID: AY, Pin-B). If necessary replace

the cable.

c) If the continuity is good and there is no slackness in

connector, then the digital output card MLSD 16 in slot No. 14

is defective. Replace the card.

10. If P21 is picking up, check the status of Green LED 4 on the digital

input card 2 in slot 10.

11. If the Green LED 4 is not glowing, check supply Voltage at auxiliary

contact (wire No. 51) with respect to locomotive 4 wire.

A. If voltage is zero, check the continuity of 51-wire loop coming to

P21 power contactor auxiliary contact.

12. If voltage is more than 65V, then check voltage at auxiliary contact

(wire no. P21FB) with respect to locomotive 4 wire.

A. If voltage is zero, the auxiliary contact is bad. Replace the

auxiliary contacts.

13. If voltage is more than 60 V,

a) Check the slackness of connector of cable ID: AU at MEP-660.

If slack tighten and check the LED status.

b) Check the continuity of Wire P21FB from P21 power contactor

to MEP-660. (Cable ID: AU, Pin-E). If necessary replace the

cable.

14. If the Green LED 4 is glowing:

A. Check the status of corresponding Yellow LED on the same card.

B. If the yellow LED is not glowing, then the digital input card MDIP

16 in slot No. 10 is defective. Replace the card and check.

15. If Both Green and Yellow LEDs 4 are glowing on the digital input

card MDIP 16 in slot 10, the feed back status should be displayed

ON. Toggle the P21 contactor operation two to three times and

ensure the feedback signal is changing accordingly.

129

PARAMETER

DESCRIPTION

FAULT CODE

1129

FAULT MESSAGE

P31 stuck open. Run Auto/manual test.

Power Limited. Power circuit problem

RESTRICTIONS

Reference power is reduced by 1/3 times of such faults while motoring

in 6P mode.

Dynamic brake prohibited.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when P31 power contactor closes.

RECOVERY

PROBABLE

1. Defective power contactor.

CAUSES

2. Bad wiring.

3. Slackness in connector of cable ID: AY at MEP-660.

4. Defective digital output card MLSD 16 in slot 14.

5. Slackness in connector of cable ID: AU at MEP-660

6. Defective digital input card MDIP 16 in slot 10.

FAULT

This fault will be logged due to delayed / sluggish operation of power

ISOLATION

contactors. The fault may not exist while troubleshooting. In such case

check and ensure that the power contactor is operating freely and the

auxiliary contact is having sufficient over travel and pressure.

Check and ensure control air pressure is 5Kg./Sq.Cm. If control air

pressure is less/excess adjust to 5Kg./Sq./Cm.

Operate the power contactor manually by pressing armature plate

of the magnet valve.

If the power contactor is not operating:

A. Defective pneumatic pipeline. Check and replace the pipeline.

B. Defective magnet valve. Check and replace.

C. Defective power contactor. Check and replace.

If the power contactor is operating, set up the display to ‘Manual

Test for Outputs’ under ‘Test Mode’ menu option.

Enter 2 and press ‘Enter’ key to test P31 power contactor operation.

Press 1 to energise the P31 contactor.

If P31 is not picking up, check voltage at the power contactor

magnet valve terminals.

A. If the voltage is more than 65V, magnet valve coil is defective.

Replace the magnet valve.

If the voltage is zero, check voltage at coil terminal (wire 13) with

respect to locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to magnet valve coil. Check and replace open circuited

wire/wrong connection.

If the voltage is more than 60 V, Check the supply voltage between

loco wire 50 and magnet valve coil terminal P31CL.

A. If voltage is zero, there is no continuity of wire P31CL from MEP-

660 to magnet valve.

a) Check slackness of connector of (Cable ID: AY) at MEP-660. If

slack tighten the connector.

b) Check the continuity of P31CL wire from MEP-660 to magnet

130

valve coil terminal (Cable ID: AY, Pin-C). If necessary replace

the cable.

c) If the continuity is good and there is no slackness in

connector, then the digital output card MLSD 16 in slot No. 14

is defective. Replace the card.

10. If P31 is picking up, check the status of Green LED 5 on the digital

input card 2 in slot 10.

11. If the Green LED 5 is not glowing, check supply Voltage at auxiliary

contact (wire No. 51) with respect to locomotive 4 wire.

A. If voltage is zero, check the continuity of 51-wire loop coming to

P31 power contactor auxiliary contact.

12. If voltage is more than 65V, then check voltage at auxiliary contact

(wire no. P31FB) with respect to locomotive 4 wire.

A. If voltage is zero, the auxiliary contact is bad. Replace the

auxiliary contacts.

13. If voltage is more than 60V,

A. Check the slackness of connector of cable ID: AU at MEP-660. If

slack tighten and check the LED status.

B. Check the continuity of Wire P31FB from P31 power contactor to

MEP-660. (Cable ID: AU, Pin-F). If necessary replace the cable.

14. If the Green LED 5 is glowing:

A. Check the status of corresponding Yellow LED on the same card.

B. If the yellow LED is not glowing, then the digital input card MDIP

16 in slot No. 10 is defective. Replace the card and check.

15. If Both Green and Yellow LEDs 5 are glowing on the digital input

card MDIP 16 in slot 10, the feed back status should be displayed

ON. Toggle the P31 contactor operation two to three times and

ensure the feedback signal is changing accordingly.

131

PARAMETER

DESCRIPTION

FAULT CODE

1130

FAULT MESSAGE

P2 stuck open. Run Auto/manual test.

Power Limited. Power circuit problem

RESTRICTIONS

Reference power is reduced by 1/6 times of such faults while motoring

in 6P mode.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when P2 power contactor closes.

RECOVERY

PROBABLE

1. Defective power contactor.

CAUSES

2. Bad wiring.

3. Slackness in connector of cable ID: AY at MEP-660.

4. Defective digital output card MLSD 16 in slot 14.

5. Slackness in connector of cable ID: AU at MEP-660

6. Defective digital input card MDIP 16 in slot 10.

FAULT

This fault will be logged due to delayed / sluggish operation of power

ISOLATION

contactors. The fault may not exist while troubleshooting. In such case

check and ensure that the power contactor is operating freely and the

auxiliary contact is having sufficient over travel and pressure.

Check and ensure control air pressure is 5Kg./Sq.Cm. If control air

pressure is less/excess adjust to 5Kg./Sq./Cm.

Operate the power contactor manually by pressing armature plate

of the magnet valve.

If the power contactor is not operating:

A. Defective pneumatic pipeline. Check and replace the pipeline.

B. Defective magnet valve. Check and replace.

C. Defective power contactor. Check and replace.

If the power contactor is operating, set up the display to ‘Manual

Test for Outputs’ under ‘Test Mode’ menu option.

Enter 3 and press ‘Enter’ key to test P2 power contactor operation.

Press 1 to energise the P2 contactor.

If P2 is not picking up, check voltage at the power contactor

magnet valve terminals.

A. If the voltage is more than 65V, magnet valve coil is defective.

Replace the magnet valve.

If the voltage is zero, check voltage at coil terminal (wire 13) with

respect to locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to magnet valve coil. Check and replace open circuited

wire/wrong connection.

If the voltage is more than 60 V, Check the supply voltage between

loco wire 50 and magnet valve coil terminal P2CL.

A. If voltage is zero, there is no continuity of wire P2CL from MEP-

660 to magnet valve.

a) Check slackness of connector of (Cable ID: AY) at MEP-660. If

slack tighten the connector.

b) Check the continuity of P2CL wire from MEP-660 to magnet

valve coil terminal (Cable ID: AY, Pin-D). If necessary replace

132

the cable.

c) If the continuity is good and there is no slackness in

connector, then the digital output card MLSD 16 in slot No. 14

is defective. Replace the card.

10. If P2 is picking up, check the status of Green LED 6 on the digital

input card 2 in slot 10.

11. If the Green LED 6 is not glowing, check supply Voltage at auxiliary

contact (wire No. 51) with respect to locomotive 4 wire.

A. If voltage is zero, check the continuity of 51-wire loop coming to

P2 power contactor auxiliary contact.

12. If voltage is more than 65V, then check voltage at auxiliary contact

(wire no. P2FB) with respect to locomotive 4 wire.

A. If voltage is zero, the auxiliary contact is bad. Replace the

auxiliary contacts.

13. If voltage is more than 60 V,

A. Check the slackness of connector of cable ID: AU at MEP-660. If

slack tighten and check the LED status.

B. Check the continuity of Wire P2FB from P2 power contactor to

MEP-660. (Cable ID: AU, Pin-G). If necessary replace the cable.

14. If the Green LED 6 is glowing:

A. Check the status of corresponding Yellow LED on the same card.

B. If the yellow LED is not glowing, then the digital input card MDIP

16 in slot No. 10 is defective. Replace the card and check.

15. If Both Green and Yellow LEDs 6 are glowing on the digital input

card MDIP 16 in slot 10, the feed back status should be displayed

ON. Toggle the P2 contactor operation two to three times and

ensure the feedback signal is changing accordingly.

133

PARAMETER

DESCRIPTION

FAULT CODE

1131

FAULT MESSAGE

P22 stuck open. Run Auto/manual test.

Power Limited. Power circuit problem

RESTRICTIONS

Reference power is reduced by 1/6 times of such faults while motoring

in 6P mode.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when P22 power contactor closes.

RECOVERY

PROBABLE

1. Defective power contactor.

CAUSES

2. Bad wiring.

3. Slackness in connector of cable ID: AY at MEP-660.

4. Defective digital output card MLSD 16 in slot 14.

5. Slackness in connector of cable ID: AU at MEP-660

6. Defective digital input card MDIP 16 in slot 10.

FAULT

This fault will be logged due to delayed / sluggish operation of power

ISOLATION

contactors. The fault may not exist while troubleshooting. In such case

check and ensure that the power contactor is operating freely and the

auxiliary contact is having sufficient over travel and pressure.

Check and ensure control air pressure is 5Kg./Sq.Cm. If control air

pressure is less/excess adjust to 5Kg./Sq./Cm.

Operate the power contactor manually by pressing armature plate

of the magnet valve.

If the power contactor is not operating:

A. Defective pneumatic pipeline. Check and replace the pipeline.

B. Defective magnet valve. Check and replace.

C. Defective power contactor. Check and replace.

If the power contactor is operating, set up the display to ‘Manual

Test for Outputs’ under ‘Test Mode’ menu option.

Enter 4 and press ‘Enter’ key to test P22 power contactor operation.

Press 1 to energise the P22 contactor.

If P22 is not picking up, check voltage at the power contactor

magnet valve terminals.

A. If the voltage is more than 65V, magnet valve coil is defective.

Replace the magnet valve.

If the voltage is zero, check voltage at coil terminal (wire 13) with

respect to locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to magnet valve coil. Check and replace open circuited

wire/wrong connection.

If the voltage is more than 60 V, Check the supply voltage between

loco wire 50 and magnet valve coil terminal P22CL.

A. If voltage is zero, there is no continuity of wire P22CL from MEP-

660 to magnet valve.

a) Check slackness of connector of (Cable ID: AY) at MEP-660. If

slack tighten the connector.

b) Check the continuity of P22CL wire from MEP-660 to magnet

134

valve coil terminal (Cable ID: AY, Pin-E). If necessary replace

the cable.

c) If the continuity is good and there is no slackness in

connector, then the digital output card MLSD 16 in slot No. 14

is defective. Replace the card.

10. If P22 is picking up, check the status of Green LED 7 on the digital

input card 2 in slot 10.

11. If the Green LED 7 is not glowing, check supply Voltage at auxiliary

contact (wire No. 51) with respect to locomotive 4 wire.

A. If voltage is zero, check the continuity of 51-wire loop coming to

P22 power contactor auxiliary contact.

12. If voltage is more than 65V, then check voltage at auxiliary contact

(wire no. P22FB) with respect to locomotive 4 wire.

A. If voltage is zero, the auxiliary contact is bad. Replace the

auxiliary contacts.

13. If voltage is more than 60 V,

A. Check the slackness of connector of cable ID: AU at MEP-660. If

slack tighten and check the LED status.

B. Check the continuity of Wire P22FB from P22 power contactor to

MEP-660. (Cable ID: AU, Pin-H). If necessary replace the cable.

14. If the Green LED 7 is glowing:

A. Check the status of corresponding Yellow LED on the same card.

B. If the yellow LED is not glowing, then the digital input card MDIP

16 in slot No. 10 is defective. Replace the card and check.

15. If Both Green and Yellow LEDs 7 are glowing on the digital input

card MDIP 16 in slot 10, the feed back status should be displayed

ON. Toggle the P22 contactor operation two to three times and

ensure the feedback signal is changing accordingly.

135

PARAMETER

DESCRIPTION

FAULT CODE

1132

FAULT MESSAGE

P32 stuck open. Run Auto/manual test.

Power Limited. Power circuit problem

RESTRICTIONS

Reference power is reduced by 1/6 times of such faults while motoring

in 6P mode.

Dynamic brake prohibited.

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when P32 power contactor closes.

RECOVERY

PROBABLE

1. Defective power contactor.

CAUSES

2. Bad wiring.

3. Slackness in connector of cable ID: AY at MEP-660.

4. Defective digital output card MLSD 16 in slot 14.

5. Slackness in connector of cable ID: AU at MEP-660

6. Defective digital input card MDIP 16 in slot 10.

FAULT

This fault will be logged due to delayed / sluggish operation of power

ISOLATION

contactors. The fault may not exist while troubleshooting. In such case

check and ensure that the power contactor is operating freely and the

auxiliary contact is having sufficient over travel and pressure.

Check and ensure control air pressure is 5Kg./Sq.Cm. If control air

pressure is less/excess adjust to 5Kg./Sq./Cm.

Operate the power contactor manually by pressing armature plate

of the magnet valve.

If the power contactor is not operating:

A. Defective pneumatic pipeline. Check and replace the pipeline.

B. Defective magnet valve. Check and replace.

C. Defective power contactor. Check and replace.

If the power contactor is operating, set up the display to ‘Manual

Test for Outputs’ under ‘Test Mode’ menu option.

Enter 5 and press ‘Enter’ key to test P32 power contactor operation.

Press 1 to energise the P32 contactor.

If P32 is not picking up, check voltage at the power contactor

magnet valve terminals.

A. If the voltage is more than 65V, magnet valve coil is defective.

Replace the magnet valve.

If the voltage is zero, check voltage at coil terminal (wire 13) with

respect to locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to magnet valve coil. Check and replace open circuited

wire/wrong connection.

If the voltage is more than 60 V, Check the supply voltage between

loco wire 50 and magnet valve coil terminal P32CL.

A. If voltage is zero, there is no continuity of wire P32CL from MEP-

660 to magnet valve.

a) Check slackness of connector of (Cable ID: AY) at MEP-660. If

slack tighten the connector.

136

b) Check the continuity of P32CL wire from MEP-660 to magnet

valve coil terminal (Cable ID: AY, Pin-F). If necessary replace

the cable.

c) If the continuity is good and there is no slackness in

connector, then the digital output card MLSD 16 in slot No. 14

is defective. Replace the card.

10. If P32 is picking up, check the status of Green LED 8 on the digital

input card 2 in slot 10.

11. If the Green LED 8 is not glowing, check supply Voltage at auxiliary

contact (wire No. 51) with respect to locomotive 4 wire.

A. If voltage is zero, check the continuity of 51-wire loop coming to

P32 power contactor auxiliary contact.

12. If voltage is more than 65V, then check voltage at auxiliary contact

(wire no. P32FB) with respect to locomotive 4 wire.

A. If voltage is zero, the auxiliary contact is bad. Replace the

auxiliary contacts.

13. If voltage is more than 60 V,

A. Check the slackness of connector of cable ID: AU at MEP-660. If

slack tighten and check the LED status.

B. Check the continuity of Wire P32FB from P32 power contactor to

MEP-660. (Cable ID: AU, Pin-J). If necessary replace the cable.

14. If the Green LED 8 is glowing:

A. Check the status of corresponding Yellow LED on the same card.

B. If the yellow LED is not glowing, then the digital input card MDIP

16 in slot No. 10 is defective. Replace the card and check.

15. If Both Green and Yellow LEDs 8 are glowing on the digital input

card MDIP 16 in slot 10, the feed back status should be displayed

ON. Toggle the P32 contactor operation two to three times and

ensure the feedback signal is changing accordingly.

137

PARAMETER

DESCRIPTION

FAULT CODE

1133

FAULT MESSAGE

EXPR circuit open. Run Auto / manual test

May not power up.

RESTRICTIONS

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when EXPR circuit is detected as closed.

RECOVERY

PROBABLE

1. Defective EXPR relay

CAUSES

2. Defective wiring.

3. Slackness of Connector of cable at MEP-660 (Cable ID: AY)

4. Defective digital output card MLSD 16 in slot 14

5. Slackness of connector of cable at MEP-660 (cable ID: AV)

6. Defective digital input card MDIP 16 in slot 11.

FAULT

After cranking wait for two minutes and check the status of EXPR relay.

ISOLATION

If EXPR relay is not picking up check the supply at EXPR relay coil

terminals.

A. If the voltage is more than 65V, and still the relay is not picking

up then the EXPR relay is defective. Replace the relay.

If the voltage is zero, check the voltage at coil terminal (Wire-13)

with respect to locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to EXPR relay. If necessary replace the open circuited /

wrong connections.

If voltage is more than 65V, check the voltage between locomotive

wire-50 and EXPR coil terminal (wire No. EXPRCL).

A. If the voltage is zero

a) Check slackness of connector of cable (Cable ID: AY) at MEP-

660. If the cable is slack tighten.

b) Check continuity of wire EXPRCL from EXPR coil terminal to

MEP-660 (Cable ID: AY Pin-S). If necessary replace the cable.

c) If continuity I good, then digital output card MLSD 16 in slot

No. 14 is defective.

If the EXPR relay is picking up, check the status of Green LED 2 on

the digital input card MDIP 16 in slot No. 11.

If LED is not glowing, check voltage at EXPR relay interlock terminal

(Wire No.51)

A. If voltage is zero, check the continuity of wire 51 coming to

EXPR relay interlock. If necessary replace open circuited / wrong

connections.

If voltage is more than 65V, check the voltage between locomotive

50 wire and EXPRFB wire at EXPR interlock terminal.

A. If the voltage is zero, the interlock contact is bad. Replace the

relay.

If the voltage is more than 65V,

A. check the slackness of the connector of cable (Cable ID: AV) at

MEP-660. If cable connector is slack, tighten the connector.

B. If connector is tight, check the continuity of the wire EXPRFB

from EXPR relay interlock to MEP-660 (Cable ID: AV Pin-C). If

138

PARAMETER

DESCRIPTION

FAULT CODE

1134

FAULT MESSAGE

AGPR circuit open. Run Auto/manual test

Batteries may not charge.

RESTRICTIONS

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when AGPR circuit is detected as closed.

RECOVERY

PROBABLE

1. Defective AGPR relay

CAUSES

2. Defective wiring.

3. Slackness of Connector of cable at MEP-660 (Cable ID: AZ)

4. Defective digital output card MLSD 16 in slot 14

5. Slackness of connector of cable at MEP-660 (cable ID: AV)

6. Defective digital input card MDIP 16 in slot 11

FAULT

After cranking wait for two minutes and check the status of AGPR

ISOLATION

relay.

If AGPR relay is not picking up, check the supply at AGPR relay coil

terminals.

A. If the voltage is more than 65V, and still the relay is not picking

up then the AGPR relay is defective. Replace the relay.

If the voltage is zero, check the voltage at coil terminal (Wire-13)

with respect to locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13-wire loop

coming to AGPR relay. If necessary replace the open circuited /

wrong connections.

If voltage is more than 65V, check the voltage between locomotive

50 wire and AGPR coil terminal (wire No. AGPRCL).

A. If the voltage is zero

a) Check slackness of connector of cable (Cable ID: AZ) at MEP-

660. If the cable is slack tighten.

b) Check continuity of wire AGPRCL from AGPR coil terminal to

MEP-660 (Cable ID: AZ Pin-D). If necessary replace the cable.

c) If continuity is good, then digital output card MLSD 16 in slot

No. 14 is defective.

If the AGPR relay is picking up, check the status of Green LED 3 on

the digital input card MDIP 16 in slot No. 11.

If LED 3 is not glowing, check voltage at AGPR relay interlock

terminal (Wire No.51)

A. If voltage is zero, check the continuity of wire 51 coming to

EXPR relay interlock. If necessary replace open circuited / wrong

connections.

If voltage is more than 65V, check the voltage between locomotive

50 wire and AGPRFB wire at AGPR interlock terminal.

A. If the voltage is zero, the interlock contact is bad. Replace the

relay.

If the voltage is more than 65V,

A. check the slackness of the connector of cable (Cable ID: AV) at

MEP-660. If cable connector is slack, tighten the connector.

140

PARAMETER

DESCRIPTION

FAULT CODE

1135

FAULT MESSAGE

Wrong command. TL8 & TL0 High.

RESTRICTIONS

Cannot change direction

ALARM BELL

5 seconds

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when one of the train lines status has become zero.

RECOVERY

PROBABLE

1. Defective interlocking of master controller allowing the RH to move

CAUSES

forward or reverse while the master handle is in notch / braking

zone.

2. Loco is being controlled from more than one source.

3. Defective wiring / jumper cable

Most probably this fault is of transient nature. The fault may not be

available at the time of investigation.

FAULT

1. If loco is coupled with another loco, remove the MU jumper cable.

ISOLATION

2. Shut down the engine while doing the following tests.

3. Check for proper mechanical interlocking of both control stands.

Reverser Handle should not move when the master handle /

selector handle is set to notch / brake position. If so replace the

defective master controller.

4. Keep both the reverser handles in neutral position.

5. Check the status of Green LEDs 0 & 1 on the digital input card MDIP

16 in slot 9.

6. If either Green LED 0 or Green LED 1 is glowing, then defective

wiring. Identify which wire is getting wrong supply and isolate.

7. If both Green LEDs are OFF.

8. Apply loco brakes and ensure loco brakes are physically applied.

9. Set the Reverser Handle to Forward direction on Short hood control

stand.

10. Move the master handle to Notch 1 and switch ON both GF

switches.

11. Green LED 0 and Green LED 7 should glow on the digital input card

MDIP 16 in slot 9 and corresponding yellow LEDs also should glow.

12. Green LED 1 yellow LED 1 should be OFF.

13. Set the master handle to IDLE, RH to reverse direction and open

the notch to 1.

14. Green LED 0 should go off and Green LED 1 should glow.

15. Repeat the test on the other control stand.

142

PARAMETER

DESCRIPTION

FAULT CODE

1136

FAULT MESSAGE

BKT Stuck in Motoring. Run Auto/Manual Test

Can't Brake: Electrical Control Problem

RESTRICTIONS

Dynamic Brake Prohibited

ALARM BELL

5 Sec.

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when BKT stuck is cleared

RECOVERY

PROBABLE

BKT not operating physically to braking side.

CAUSES

BKT not operating to braking side due to magnet valve defective.

BKT not operating to braking side due to no supply to magnet

valve.

FAULT

Check and adjust control air pressure to 5Kgs./Sq.Cm.

ISOLATION

Manually operate BKT magnet valves to change the BKT position

between braking and motoring.

BKT contacts should change their position freely with out any

obstruction. Ensure the status of the Green LEDs 12 & 13 on the

digital input card MDIP16 in slot no.10 toggles with respect to BKT

position.

If the BKT is not changing its position with manual operation of

magnet valves:

A. Check the Air hose connection to magnet valve. If air is leaking

or the pipe is blocked, change the air hose connection.

B. Press the armature plate of the magnet valve and check for any

Air leaking from the Air cylinder gasket / piston packing. If air is

leaking, change the gasket / piston packing.

C. Check free operation of Paul assembly by operating the BKT

with ‘L’ rod. If the BKT is not operating with normal force

change the pawl assembly.

If the BKT is operating manually, set the BKT in motoring position

by manually operating the magnet valve.

Set the display mode to ‘Manual Test for Outputs’ under ‘Test Mode’

menu.

A. Enter 10 and press ‘Enter’ key to test the BKT braking Magnet

valve.

B. Press ‘1’ key to operate the BKT-B magnet valve.

If the BKT is not operating to braking side:

A. Check the voltage at the magnet valve coil terminals.

B. If voltage is more than 65 V, operating coil of the magnet valve

is defective. Replace the magnet valve.

C. If the voltage is zero, check the voltage at magnet valve coil

terminal (wire No. 13) with respective to locomotive 4 wire.

a) If the voltage is zero, check the continuity of 13-wire loop

connected to magnet valve. If necessary replace the open

circuited / wrong wiring.

b) If the voltage is more than 60 V, check the voltage at magnet

valve coil terminal (wire No. BKBCL) with respect to

locomotive 50 wire.

1) If the voltage is zero, then the connector at MEP-660 is

143

PARAMETER

DESCRIPTION

FAULT CODE

1137

FAULT MESSAGE

BKT-B Aux. Contact ckt. Open. Run Auto/Manual Test Can’t Brake:

Electrical Control Problem.

RESTRICTIONS

Dynamic Brake Prohibited

ALARM BELL

5 Sec.

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when BKT-B Aux. Contact is closed.

RECOVERY

PROBABLE

Low control air pressure causing sluggish operations of BKT.

CAUSES

BKT partially moved and stopped.

BKT-B auxiliary contact is bad.

Defective wiring.

Connector at MEP-660 (DI 16-DI 31) is slack

Digital input card MDIP 16 in slot No. 10 defective.

FAULT

Check and adjust control air pressure to 5Kgs./Sq.Cm.

ISOLATION

Manually operate BKT magnet valves to change the BKT position

between braking and motoring.

BKT contact should change their position freely with out any

obstruction. Ensure the status of the Green LEDs 12 & 13 on the

digital input card MDIP16 in slot no.10 toggles with respect to BKT

position.

If the BKT is moving towards Braking position and stopping in

between:

A. Check the Air hose connection to magnet valve. If air is leaking

or the pipe is blocked, change the air hose connection.

B. Press the armature plate of the magnet valve and check for any

Air leaking from the Magnet valve / Air cylinder gasket / piston

packing. If air is leaking, change the magnet valve / gasket /

piston packing.

C. Check free operation of Paul assembly by operating the BKT

with ‘L’ rod. If the BKT is not operating with normal force

change the pawl assembly.

If the BKT is operating manually:

Check the BKT-B auxiliary contact for proper operation.

If the contact is properly closing in braking side and still the fault is

logged:

A. Set the display mode to ‘Manual Test for Inputs’ under Test

mode Menu.

B. Key in 28 + ‘Enter’ key to test the status of the BKT-B feed

back.

C. Manually operate the BKT-B feedback auxiliary contact to make

and break the contact.

D. Observe the status of the Green LED 12 on the Digital input card

MDIP 16 in slot 10 and feed back position status on the display

unit.

E. The Green LED and the status on the display unit should toggle

as per the auxiliary contact position. LED should glow with

contact closed and status on display unit should be ON.

If Green LED and the status on display unit are not toggling as per

145

the contact position

A. Check the voltage at BKT-Auxiliary contact wire No. 51 with

respect to Locomotive 4 wire.

B. If the Voltage is zero, check the continuity of 51-wire loop

connecting to BKT-B auxiliary contact. Identify the open

circuited wire/ wrong connection and rectify.

C. If the voltage is more than 65V, check the voltage at auxiliary

contact wire No. BKBFB with respect to locomotive 4 wire.

D. If the voltage is zero, then the contact is bad. Adjust / replace

the auxiliary contact.

E. If the voltage is more than 65V:

a) The cable (ID: AU) connector might be slack at MEP660

control unit.

b) Check the continuity of the wire BKBFB from BKT Auxiliary

contact to MEP660. If necessary replace the cable.

9. Check the BKT braking magnet valve operation once again and

ensure the BKT feed back signals are toggling correctly.

146

PARAMETER

DESCRIPTION

FAULT CODE

1138

FAULT MESSAGE

Direction reversal attempted at High Speed. Can’t Change Direction

RESTRICTIONS

Motoring and Dynamic Brake Prohibited

ALARM BELL

5 Sec.

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when loco speed reduces to 2 KMs below the set speed for

RECOVERY

direction change.

PROBABLE

Most probably this problem occurs while the loco is n shunting service.

CAUSES

1. Driver might have attempted to reverse the direction of movement

even though the loco speed is more than 5 KMPh.

0/8 wires might be getting wrong feed through another loco in MU.

FAULT

1. Check the data pack for the fault logged.

ISOLATION

2. Check the status of 0 and 8 wires supply and locomotive speed.

3. If no attempt of directional reverse is noticed,

4. Crank the engine and the loco for forward movement.

5. Check the status of Green LEDs 0 and 1 on the MDIP 16 card in slot

6. Only one green LED and corresponding yellow LED should glow at

one direction.

7. If both Green LEDs are glowing, wiring problem. Identify the wrong

feed and rectify.

8. If only one green LED and both yellow LEDs are glowing, then the

Digital input card MDIP 16 in slot No. 9 is defective. Replace the

card and check once again.

147

PARAMETER

DESCRIPTION

FAULT CODE

1139

FAULT MESSAGE

Invalid Notch Command. Running at IDLE/Notch 1

RESTRICTIONS

Engine speed is brought to IDLE

ALARM BELL

5 Sec.

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when valid combination of TL wires 15, 12, 7, and 3 are

RECOVERY

energized.

PROBABLE

This message is logged when an invalid combination of train line

CAUSES

wires 15, 12, 7 and 3 are fed to MEP-660.

Wrong MU feeding

Defective master controller

Defective wiring between CS, TB and MU

Defective Digital input card.

FAULT

Ensure there is no MU cable connected to another loco

ISOLATION

Set both master controllers in IDLE position and ensure brake

system is working normal.

Check the status of Green and Yellow LEDs 2, 3, 4 and 5 on the

digital input card MDIP 16 in slot No. 9.

A. If any of the above said Green LEDs is glowing, wrong feed is

coming to that particular Tail Line wire.

a) Check the voltage at the backside terminal board. Identify

from where the voltage is coming and rectify.

B. If any of the above said yellow LEDs is glowing, then the digital

input card is defective. Replace the card and check up.

Set the display mode to ‘Manual Test for Inputs’ under ‘Test Mode’

menu.

Keep any of the master controller handle in steps from notch 1 to

Observe the status the both Green and Yellow LEDs 2, 3, 4 and 5

on the digital input card MDIP 16 in slot 9.

The status of the LEDs should toggle as per the notch and sequence

given below.

Notch

TL wire 15

TL wire 12

TL wire 7

TL wire 3

Green LED 2

Green LED 3

Green LED 4

Green LED 5

* Indicate LED should glow.

8. If any of the Green LEDs is not glowing as per the sequence, it

indicates that particular wire is not energized.

9. Change the master controller and check weather the same LED is

not glowing in the same sequence.

148

10. If the Green LEDs are glowing normal as per the sequence, the

previous master controller is defective. Change the master

controller.

11. If the same Green LED is not glowing in sequence

A. Check the supply at the backside panel for particular train line

wire. Identify and rectify the wrong wiring.

B. Check the connector slackness of the cable ID: AT at the MEP-

660. If slack tighten.

C. Check the wire continuity from TB to the MEP-660. (Pin C = wire

15, Pin D= wire 12, Pin E = Wire 7 and Pin F = wire 3)

D. If necessary change the cable.

12. If the Green LEDs are glowing in correct sequence and Yellow LEDs

are not in sequence, the digital input card is defective. Replace the

card.

13. If both Green and yellow LEDs are glowing in correct sequence,

then the trouble might be with MU wiring/Cable. Identify and

rectify.

149

PARAMETER

DESCRIPTION

FAULT CODE

1140

FAULT MESSAGE

Cranking Contactor Stuck Open. Engine may not Crank.

RESTRICTIONS

ALARM BELL

5 Sec.

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when CK1/CK2/CK3 auxiliary contacts open.

RECOVERY

PROBABLE

1. Defective CKC contactor

CAUSES

2. Defective output card MLSD 16 card in slot 14.

3. Connector of cable ID: AY is slack at MEP-660

4. Defective wiring

5. Defective cranking contactor

6. Defective digital input card MDIP 16 in slot 10

FAULT

This message will be logged during cranking only.

ISOLATION

Open the battery knife switch.

Manually operate and check free operation of CKC contactor and all

the three cranking contactors. Ensure there is no mechanical

obstruction to operate.

Ensure that both Green and Yellow LEDs 0, 1 and 2 on the digital

input card MDIP 16 in slot 10 are glowing.

If all the three LEDs are glowing:

A. Manually open the Auxiliary contacts of CK1, Ck2 and CK3.

B. Corresponding Green and Yellow LED should go off.

C. If corresponding LED is not going OFF,

a) Check the supply voltage on the corresponding feed back wire

(CK1FB/CK2FB/CK3FB) with respective to locomotive 4 wire.

b) If the supply is zero while the auxiliary contact is opened

manually and still the Green/Yellow LED is glowing, then the

digital input card MDIP 16 card in slot 10 is defective. Replace

the card.

c) If the supply voltage is more than 65V, then wiring mistake.

Identify from where the supply is feeding and rectify.

Close the battery knife switch and prepare the loco for cranking.

Pack the CK1, CK2, and CK3 contacts with an insulating sheet so

that auxiliary contacts open when they operate and no battery

supply is going to Aux. Machines.

Press start button.

CKC should pick up.

If CKC is not picking up.

A. Check the voltage at the operating coil of CKC.

B. If the voltage is more than 65 Volts and still CKC is not picking

up, then CKC is defective. Replace the CKC.

C. If the voltage is zero, then check the voltage at wire No. 71 with

respect loco wire No. 4.

D. If the voltage is zero check the wire continuity of wire 71

connected to CKC coil.

E. If the Voltage is more than 65 volts at wire 71, then check the

voltage between loco wire 13 and wire CKCCL at CKC coil.

F. If the voltage is zero,

150

a) Connector of the cable ID: AY is slack at MEP-660. Tighten

the connector.

b) Check the continuity of wire CKCCL from CKC coil to MEP660.

(Pin-R, Cable: AY) if necessary replace the cable.

c) The digital output card MLSD 16 in slot 14 is defective.

Replace the card and check up.

10. If CKC is picking up and none of the CK contactors picking up, then

the main contacts of the CKC are bad. Change the contactor and

check up.

11. If CKC is picking up and any one of the three CK contactors is not

picking up, then it is a wiring mistake. Identify and rectify.

151

PARAMETER

DESCRIPTION

FAULT CODE

1141

FAULT MESSAGE

Aux. Gen. Output Voltage High FAULT

RESTRICTIONS

Battery charging

ALARM BELL

5 Sec.

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when Aux. Gen. Voltage is reduced.

RECOVERY

Automatic fault reset is permitted for 3 times in an Hour. After that

manual reset is required.

PROBABLE

1. Defective Aux. Generator due direct short of field wire with

CAUSES

Armature.

2. Defective MPWM2 card

3. Defective AGD / wiring

4. Defective Aux. Gen. Voltage sensor.

5. Defective MAIP8_AU card (Analog input card of Aux. Unit) in slot 1

6. Defective MAUCC card (Aux. Unit Control card) in slot No. 3

FAULT

1. Check the wiring of he Auxiliary machines. Ensure there is no short

ISOLATION

between LSS (A) and LAA terminals.

2. Ensure AGD wiring connections are intact.

3. Check the AGD with a multimeter for forward and reverse

resistance. If the diode is normal, reconnect the Wires back

before doing any test.

4. If the diode is showing open circuited on both sides, replace the

AGD.

5. Set the display mode to ‘Auxiliary’ under display mode.

6. If Au. Gen. Field current (AGFI) is high and APWM value is less,

then the MPWM2 card might be defective. Replace the card and

check.

7. If AGFI is proportional to APWM value, measure voltage at LA and

LAA terminals of the Aux. Gen.

8. If the measured voltage is =72 V and lower than the displayed

AGAV value, then the AGAV voltage sensor is defective. Replace the

Voltage sensor and check again.

9. If all the values of AGFI, APWM, AGAV and battery charging is with

in the limits and still the fault is logged, MAIP8_AU card or MAUCC

card might be defective.

10. Replace the cards and check once again.

152

PARAMETER

DESCRIPTION

FAULT CODE

1142

FAULT MESSAGE

Battery Charging Current High FAULT.

RESTRICTIONS

Battery charging

ALARM BELL

5 Sec.

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when battery-charging current is reduced.

RECOVERY

Automatic fault reset is permitted for 3 times in an Hour. After that

manual reset is required.

PROBABLE

Most probably this message will be logged soon after cranking.

CAUSES

1. Defective batteries

2. Defective BATI

3. Defective Aux. Gen. with internal short of field to armature.

FAULT

1. Check the individual cell voltage and specific gravity. Replace the

ISOLATION

defective battery.

2. Check the battery charging current shown on the display and the

value shown on battery ammeter.

3. If display is showing abnormally more value, then the battery

charging current sensor (BATI) is bad.

4. Replace the sensor and check once again.

5. If the message is followed by ‘Aux. Gen. Voltage High Fault’ or

‘Aux. Gen. Output Over Current’ then check for the other faults.

153

PARAMETER

DESCRIPTION

FAULT CODE

1143

FAULT MESSAGE

Aux. Gen. Output Over current FAULT

RESTRICTIONS

Battery charging

ALARM BELL

5 Sec.

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when Aux. Gen. output current is reduced.

RECOVERY

Automatic fault reset is permitted for 3 times in an Hour. After that

manual reset is required.

PROBABLE

1. There may be a real high current due to short circuited load

CAUSES

2. Defective Aux. Generator due to direct short of field wire with

Armature.

3. Defective AGAI current sensor

4. Defective Aux. Gen. Voltage sensor.

5. Defective MAIP8_AU card (Analog input card of Aux. Unit) in slot 1

6. Defective MAUCC card (Aux. Unit Control card) in slot No. 3

FAULT

If the fault is logged soon after cranking, then it may due to deep

ISOLATION

discharge. The message may be ignored.

1. Set the display mode to ‘Auxiliary’ under ‘Display’ menu option.

2. If (AGAV) Aux. Gen Voltage is high but the AGFI is zero or normal:

A. Defective Aux. Gen. with a field short-circuited internally with

the armature.

‘Aux. Gen Voltage High’ message will be logged.

3. If Battery charging current is high but AGAV voltage is normal:

A. It may be due to defective battery set. Check individual battery

voltage and specific gravity value and level. Replace the

defective battery. However the ‘Battery charging current High’

message will also be logged.

4. Measure and compare the Current flowing from Aux. Gen. with a

clamp on ammeter.

A. If both AGAI value on the display and clamp on ammeter are

same ad high, then there is a real over load. Identify and

rectify.

B. If the AGAI value is comparatively higher than the clamp on

ammeter, then AGAI is defective. Replace the sensor and check

again.

C. If both AGAI value and clamp on ammeter value are same and

the values are with in the set limit of AGAI and still the fault is

logged then the MAIP8_AU or MAUCC cards are defective.

Replace the cards and check again.

154

PARAMETER

DESCRIPTION

FAULT CODE

1144

FAULT MESSAGE

Aux. Gen. Field Over Current FAULT

RESTRICTIONS

Battery charging

ALARM BELL

5 Sec.

RESET LEVEL

Medium, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when Aux. Gen. field current is reduced.

RECOVERY

Automatic fault reset is permitted for 3 times in an Hour. After that

manual reset is required.

PROBABLE

External short circuit between AGC wire and 4 wire.

CAUSES

Defective MPWM2 card.

Defective (AGAV) Aux. Gen. Voltage sensor.

FAULT

Set the display mode to ‘Auxiliary’ under ‘Display Mode’ menu.

ISOLATION

Switch OFF AGFB breaker and Crank the engine.

On the display APWM value should be zero.

If AGFI is abnormally high, remove MPWM2 card from slot 18.

A. If AGFI is still showing high, there could be an external short

circuit bypassing PWM o/p (AGF) or the Aux. Gen. is defective.

a) Check up the short-circuited wires and replace. If necessary

replace the Aux. Gen.

B. If AGFI is zero after removing MPWM2 card, the MPWM2 card is

defective. Replace and check up.

Switch ON AGFB. APWM and AGFI should rise slowly.

If the fault still logged, check the Aux. Gen. Voltage AGAV.

If AGAV is zero, measure the Aux. Gen. Voltage with a voltmeter at

the Aux. Gen. terminals.

A. If the Voltage is zero, there is an open circuit in the machine. A

fault message ‘Auxiliary Generator Output Circuit Open FAULT’

will also be logged. Check up with the machine.

If the voltage at Aux. Gen. Terminals is 72V, measure the voltage

at AGAV voltage sensor input terminals.

A. If the voltage is zero, the wiring from Ax. Gen. To AGAV voltage

sensor is defective. Identify the open circuited leads and

replace.

If the voltage at AGAV sensor terminals is 72V and AGAV is

showing zero, the AGAV sensor is defective.

A. Replace the AGAV sensor and check up.

155

PARAMETER

DESCRIPTION

FAULT CODE

1145

FAULT MESSAGE

Auxiliary Generator Output Circuit Open FAULT

No Battery Charging. Warning: Battery Life Limited. Loco may STALL.

RESTRICTIONS

Battery charging.

ALARM BELL

5 Sec.

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when Aux. Gen. Out put circuit is detected as closed.

RECOVERY

PROBABLE

1. Defective wiring (Open circuited at Aux. Gen. TB or back side TB.)

CAUSES

2. Defective Aux. Gen.

3. Defective AGAI current sensor.

FAULT

1. Set the display mode to ‘Auxiliary’ under ‘Display Mode’ menu.

ISOLATION

2. Crank the engine and switch ON AGFB.

3. If AGFI is more than zero and aux. Gen. voltage is 72V and AGAI is

showing zero, then there is an external open circuit after the Aux.

Gen.

A. Check up terminals at the back side TB for any burnt / fused

terminals of the Aux. Gen.

B. Identify and replace the defective wiring.

4. If BATI is showing and AGAI is showing less than BATI then AGAI

current sensor is defective. Replace and check up

156

PARAMETER

DESCRIPTION

FAULT CODE

1146

FAULT MESSAGE

Aux. Gen. Field Circuit Open or Short.

No Battery Charging. Warning: Battery Life Limited. Loco may STALL.

RESTRICTIONS

Battery charging.

ALARM BELL

5 Sec.

RESET LEVEL

Low, Manual

After manual reset if the fault still present, the fault will be generated

again.

FAULT

Automatic when Aux. Gen. field circuit is closed.

RECOVERY

PROBABLE

1. Defective wiring (Open circuited at Aux. Gen. TB or back side TB.)

CAUSES

2. Defective AGFB

3. Bad interlocks of AGPR. (AGC-AGD, AGD-AGF)

4. Defective Aux. Gen. (Field is internally open circuited.)

5. Defective MPWM2 card.

FAULT

1. Set the display mode to ‘Auxiliary’ under ‘Display Mode’ menu.

ISOLATION

3. Crank the engine and switch ON AGFB.

4. If APWM is more than 0 and AGFI is zero,

5. Check voltage between wire 49 (at AGFB) and locomotive 4-wire.

A. If Voltage is zero, 49-wire loop coming to AGFB is open

circuited. Identify and replace.

6. If the voltage is more than 65V, check Voltage between wire-49B at

AGFB breaker and locomotive 4-wire.

A. If voltage is 0 with AGFB in ON position then the AGFB is

defective. Replace the AGFB.

7. If the voltage between wire- 49B at AGFB and locomotive 4-wire is

more than 65V, check the voltage between wire-49B at backside TB

and locomotive 4-wire.

A. If the voltage is at backside TB (49B) is zero, the wire-49B from

AGFB to back side TB is open circuited. Replace the wire.

8. If the voltage at 49B (back side TB) is more than 65V, check the

voltage between wire LS at Aux. Gen. Terminal and locomotive 4-

wire.

A. If Voltage is 0, Wire-49B from backside TB to Aux. Gen. is open

circuited. Replace the wiring.

9. If voltage at LS (Aux. Gen. TB) is more than 65V

10. Switch off AGFB and disconnect the wire AGF which is going to

MEP-660 (Cable ID: AR) from the backside TB. Switch ON AGFB.

11. Check the voltage between wire-LSS at Aux. Gen. TB and

locomotive 4-wire.

A. If Voltage is 0, Aux. Gen. field open circuited internally. Check

and replace the Aux. Gen.

12. If Voltage at LSS (Aux. Gen. TB) is more than 65V, Check the

voltage between wire LSS at AGFI current sensor and locomotive 4

wire.

A. If the Voltage is zero, the wire LSS from Aux. Gen. TB to AGFI

current sensor is open circuited.

13. If the Voltage ay wire LSS (AGFI) is more than 65V, check the

voltage between wire AGC at AGFI current sensor and locmotive 4-

wire.

A. If the voltage is 0, the AGFI current sensor is defective. Replace

157

the AGFI current sensor.

14. If voltage at AGC (AGFI) is more than 65V, check the voltage AGF

backside TB and locomotive 4 wire.

A. If the voltage is zero,

a) Wire-AGC from AGFI to AGPR interlock is open circuited.

Check and replace.

b) AGPR interlocks bad. Replace the AGPR relay.

c) Wire-AGF from AGPR interlock and backside TB is open

circuited. Check and replace.

15. If voltage at wire AGF at the backside TB is more than 65V,

A. Check the slackness of the connecter of cable ID: AR at MEP660.

If slack tighten.

B. Check the continuity of wire AGF from TB to connector of cable

ID: AR, Pin - C. If necessary replace the cable.

C. Switch off AGFB and reconnect the AGF wire to backside TB.

Switch ON AGFB.

16. If still AGFI is showing zero, MPWM2 card might be defective.

Replace the card check up.

158

PARAMETER

DESCRIPTION

FAULT CODE

1147

FAULT MESSAGE

AUX EEPROM Faulty. All AUX Faults Cleared.

RESTRICTIONS

ALARM BELL

RESET LEVEL

HIGH, Manual

FAULT

RECOVERY

PROBABLE

System detected fault while writing the faults on EEPROM

CAUSES

FAULT

ISOLATION

PARAMETER

DESCRIPTION

FAULT CODE

1149

FAULT MESSAGE

VCD Stuck Closed. Run Auto/manual Test

May Not Apply Alerter Brake

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present even when cleared manually, the

fault will be generated again.

FAULT

Automatic when VCDR auxiliary contact is open.

RECOVERY

PROBABLE

This fault is logged when the relay VCDR is defective or VCDR feed

CAUSES

back interlock wiring is short-circuited.

FAULT

1. Shutdown the engine. Switch ON MB1, MB2 and MPCB breakers

ISOLATION

only. Check the status of the VCDR relay.

2. If the relay is in energized position, check the supply across the

relay coil.

A. If the voltage is zero but relay energised, then the relay is

defective. Replace.

3. If the Voltage is more than 65 V, digital output card MLSD16 in slot

No. 15 is defective. Replace the card.

4. With the relay in de-energized position, check the status of Green

LED 11 on the digital input card MDIP 16 in slot no.12.

A. If both Greed LED 11 and corresponding yellow LED 11 are

glowing, wire No. VCDR FB is getting supply due

a) Faulty wiring. Check and rectify.

b) Relay VCDR is defective. Replace the relay.

Note: This Error message will be generated only if alerter relay is provided and “VCD

Enable” Flag and “VCD Relay Connected” flags are set.

159

PARAMETER

DESCRIPTION

FAULT CODE

1150

FAULT MESSAGE

VCD Circuit Open. Run Auto/Manual Test.

Alerter Brake might be applied. Loco may not move.

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present even when cleared manually, the

fault will be generated again.

FAULT

Automatic when VCDR auxiliary contact is closed.

RECOVERY

PROBABLE

Defective relay VCDR.

CAUSES

Defective wiring.

Defective digital output card MLSD16 card

Defective Digital Input card MDIP 16.

FAULT

Crank the engine. Check the status of the relay VCDR.

ISOLATION

If the relay is in de-energised position, check the voltage across the

operating coil of the VCDR.

A. If the voltage is more than 65V and relay not picking up, then

the relay is defective. Replace the relay.

If the voltage is zero, check the voltage between wire-13 at the

VCDR coil terminal and locomotive 4 wire.

A. If the voltage is zero, check the continuity of wire 13 connected

to VCDR coil terminal. Identify the wrong wiring and replace.

If the voltage at wire 13 (VCDR coil terminal) is more than 65V,

check the voltage between locomotive wire-13 and ALRR wire at the

coil terminal.

A. If the voltage is 0, there is no continuity of wire ALRR from

MEP660 to VCDR coil.

a) Check the slackness of the connector cable (ID: AZ) at the

MEP-660 control unit. If slack tighten the connector.

b) Check the continuity of the wire ALRR from the coil to

connector of cable ID: AZ, Pin No. K. If necessary replace

the cable.

c) If still relay is not energized, the MLSD 16/2 card in slot No.

15 defective. Replace the card and check up.

If the relay is in energized position, check the status of Green LED

11 on the digital input card MDIP 16 in slot no.12.

If Greed LED 11 is not glowing, check the voltage between wire 51

at the VCDR interlock and locomotive 4 wire.

A. If the voltage is 0, check the continuity of 51-wire loop. Identify

and replace the wrong wiring.

If the voltage is more than 65V, check the voltage between wire

ALT at the VCDR interlock and locomotive 4 wire.

A. If the voltage is zero, then the relay interlock is bad. Replace

the relay.

If the voltage is more than 65V,

A. Check the slackness of the cable (ID: AW) connector at the

MEP-660 control unit.

B. Check continuity of the wire ALT from ALRTRB relay interlock to

the connector Pin - M (ID: AW).

C. If necessary replace the cable and check.

160

PARAMETER

DESCRIPTION

FAULT CODE

1151

FAULT MESSAGE

AFLR Stuck Closed. Run Auto/Manual Test. Flasher Light might not

glow if Train parting occurs.

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present even when cleared manually, the

fault will be generated again.

FAULT

Automatic when AFLR auxiliary contact is open.

RECOVERY

PROBABLE

1. Defective relay AFLR.

CAUSES

2. Defective wiring.

3. Defective digital output card MLSD16

FAULT

1. Switch ON circuit breakers MB1, MB2 breakers only and all other

ISOLATION

breakers in OFF position. Check the status of ALFR relay. The relay

should be in de-energised position.

2. If interlocks are in disturbed condition and Green LED 12 on the

digital input card MDIP16 in slot 12 is glowing replace the relay.

3. If the relay is in energized position, check the voltage across the

coil.

A. If the voltage is zero, but the relay is picked up position, then

relay is defective. Replace the relay.

B. If the voltage is more than 65V, then the MLSD16 card is

defective. Replace the card.

4. With the AFL relay in de-energised position, check the status of the

Green LED 12 on the digital input card MDIP16 in slot No. 12.

If the Green LED is glowing, AFLR FB wire is getting wrong supply

continuously. Check up wiring and rectify.

If the green LED 12 is not glowing, run self test for the relay ALFR

to verify the operation of relay interlocks.

Note: This Error message will be generated only if Auto Flasher relay is provided and

“Auto Flasher Enabled” Flag is set.

162

PARAMETER

DESCRIPTION

FAULT CODE

1152

FAULT MESSAGE

AFLR Circuit Open. Run Auto/Manual Test. Remove AFLR Relay to stop

Buzzer & Flasher Light glowing.

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present even when cleared manually, the

fault will be generated again.

FAULT

Automatic when AFLR auxiliary contact is closed.

RECOVERY

PROBABLE

Defective relay AFLR.

CAUSES

Defective wiring.

Defective MLSD16 card in slot 15.

Defective MDIP16 card in slot 12.

FAULT

Switch ON circuit breakers MB1, MB2 and MPCB breakers only and

ISOLATION

all other breakers in OFF position. Check the status of AFLR relay.

The relay should be in energised position.

If the AFL Relay is in de-energized position, check the voltage

between 50 wire at the coil and locomotive 4-wire.

A. If the voltage is zero, check the continuity of the 50-wire loop

connected to the AFL Relay. Identify the wrong connections and

rectify.

If the voltage at 50-wire (AFLR terminal) is more than 65V, check

the voltage between locomotive 50 wire and the wire AFLRCL at the

coil terminal.

A. If the voltage is zero, there is no continuity of AFLRCL wire from

MEP660 to AFLR relay.

a) Check the slackness of the connector at MEP for the cable ID:

AZ. If slack tighten the connector.

b) Check the continuity of the wire AFLRCL from the coil terminal

to the connector of cable ID: AZ

(Pin - L). If necessary

replace the cable.

c) If still the AFL Relay is not energized, the MLSD 16 card in

slot 15 might be defective. Replace and check up.

If the Voltage is more than 65V and the AFL Relay is not energized,

then the relay is defective. Replace the relay.

If the AFL Relay is energized and the still the fault is logging:

Check the status of the Green LED 12 on the digital input card

MDIP16 in slot 12.

If the Green LED 12 is not glowing, check the voltage between wire

51 at the AFLR interlock and locomotive 4 wire.

A. If the voltage is zero check the continuity of 51 wire connected

to AFLR interlock.

If the Voltage is more than 65 V, check the voltage between wire

No. AFLRFB at the relay terminal and locomotive 4 wire.

A. If the voltage is zero, AFLR interlock is bad. Replace the relay. If

the Green LED still does not glow

If the voltage at AFLRFB (relay interlock) is more than 65V,

A. Check the slackness of the connector at the control unit for the

cable ID: AW. Tighten the connector if slack.

B. Check the continuity of the wire AFLRFB from the coil terminal

163

to the connector pin-N. If necessary replace the cable.

C. If the Green LED is not glowing still the digital input card

MDIP16 in slot No. 12 might be defective. Replace the card and

check up.

10. If the Green LED 12 is glowing, and yellow LED is not glowing:

a) LED might be defective.

b) The card might be defective. Replace the card and check up.

Set the display mode to ‘Test Mode’ and select ‘Manual Test for

inputs’ Check the status of the AFLRFB input. The status should be

‘HIGH’.

Note: This Error message will be generated only if Auto Flasher relay is provided and

“Auto Flasher Enabled” Flag is set.

164

PARAMETER

DESCRIPTION

FAULT CODE

1153

FAULT MESSAGE

VCD Applied Penalty Brake. Move Master Controller Handle to IDLE and

press Reset to release Brake.

RESTRICTIONS

Motoring not permitted till the master handle is brought to IDLE and

loco speed is dropped to zero and blinking LED should stop.

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

FAULT

Automatic when the loco speed is zero, master handle is brought to

RECOVERY

IDLE, blinking LED stopped and Press VCD reset buttin.

PROBABLE

1. Driver should perform any loco operation or press alerter reset

CAUSES

switch once in 94 sec. to avoid penalty brakes.

FAULT

Bring the master handle to IDLE, wait till loco speed is dropped to zero,

ISOLATION

wait till VCD LED blinking is stopped, and then press VCD reset push

button to release penalty brakes.

PARAMETER

DESCRIPTION

FAULT CODE

1154

FAULT MESSAGE

MCU EEPROM Faulty. All MCU Faults Cleared.

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

High, Manual

FAULT

RECOVERY

PROBABLE

System detected fault while writing the faults on EEPROM.

CAUSES

FAULT

ISOLATION

165

PARAMETER

DESCRIPTION

FAULT CODE

1155

FAULT MESSAGE

DEB Engine Breaker Off.

RESTRICTIONS

Only indication, there is no restriction.

ALARM BELL

30 seconds.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the DEB breaker is switched ON.

RECOVERY

PROBABLE

DEB (Eng) Breaker is tripped/switched OFF.

CAUSES

Faulty wiring.

Defective digital input card MDIP16 in slot No. 13.

FAULT

Switch ON DEB (Eng) if tripped / Switched OFF.

ISOLATION

Check the status of Green LED 5 on the Digital input card MDIP16

in slot No. 13

If the green LED 5 is not glowing, check the voltage between wire-

50 at the breaker and locomotive 4 wire.

A. If the voltage is zero, check the wire continuity of the 50-wire

loop connected to breaker.

If the voltage at wire-50 is more than 65 V, check the voltage

between wire 73A at the breaker and the locomotive 4-wire.

A. If the voltage is zero even though DEB (eng.) is ON, then the

breaker is defective. Replace the breaker.

If the voltage at 73A (breaker terminal) is more than 65V, check

the voltage between 73A at backside TB and locomotive 4 wire.

A. If the voltage is zero, the wire 73A connected from breaker to

TB is open circuited. Replace the wire.

If the Voltage at 73A (backside TB) is more than 65V,

A. Check the slack ness of the connector at MEP-660 for the cable

ID: AX. If slack tighten the connector.

B. Check the continuity of the wire 73A from TB to the connector

pin- F. If necessary replace the cable.

C. If still Green LED on the digital input card is not glowing, the

digital input card MDIP16 in slot No. 13 might be defective.

Replace the card and check up.

If the green LED is glowing, and corresponding Yellow LED is not

glowing on the card:

A. Either LED or the card might be defective. Replace the card and

check up.

166

PARAMETER

DESCRIPTION

FAULT CODE

1156

FAULT MESSAGE

DEB Car body Breaker Off.

RESTRICTIONS

Only indication, there is no restriction.

ALARM BELL

30 seconds.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the DEB breaker is switched ON

RECOVERY

PROBABLE

DEB (Car) Breaker is tripped/switched OFF.

CAUSES

Faulty wiring.

Defective digital input card MDIP16 in slot No. 13.

FAULT

Switch ON DEB (Car) in tripped / Switched OFF.

ISOLATION

Check the status of Green LED 6 on the Digital input card MDIP16

in slot No. 13

If the green LED 6 is not glowing, check the voltage between wire

No. 50 at the breaker and locomotive 4 wire.

A. If the voltage is zero, check the wire continuity of the 50-wire

loop connected to breaker.

If the voltage at wire-50 (breaker terminal) is more than 65 V,

check the voltage between wire 73B at the breaker and the

locomotive 4 wire.

A. If the voltage is zero even though DEB (Car.) is ON, then the

breaker is defective. Replace the breaker.

If the voltage at 73B (breaker terminal) is more than 65V, check

the voltage between 73B at backside TB and locomotive 4 wire.

A. If the voltage is zero, the wire 73B connected from breaker to

TB is open circuited. Replace the wire.

If the Voltage at 73B at backside TB, is more than 65V,

A. Check the slack ness of the connector at MEP-660 for the cable

ID: AX. If slack tighten the connector.

B. Check the continuity of the wire 73B from TB to the connector

pin- G. If necessary replace the cable.

C. If still Green LED on the digital input card is not glowing, the

digital input card MDIP16 in slot No. 13 might be defective.

Replace the card and check up.

If the green LED is glowing, and corresponding Yellow LED is not

glowing on the card:

A. Either LED or the card might be defective. Replace the card and

check up.

167

PARAMETER

DESCRIPTION

FAULT CODE

1157

FAULT MESSAGE

SLBR ckt Open. Run Auto/Manual Tests

RESTRICTIONS

No Self-load box test

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when SLBR auxiliary contact is closed.

RECOVERY

PROBABLE

This message will log only after selecting self-load test through Display

CAUSES

unit.

1. Defective SLBR relay (bad contact of feedback interlock).

2. Defective wiring.

3. Slackness of Connector of cable (ID: AZ) at MEP-660.

4. Defective digital output card MLSD 16 in slot 15.

5. Slackness of connector of cable (ID: AX) at MEP-660

6. Defective digital input card MDIP 16 in slot 13.

7. Control air pressure is low or zero and none of the SLBC contactors

picked up.

FAULT

Select self-load test option under Test menu option from Display unit.

ISOLATION

Check the status of SLBR relay. If SLBR relay is not picking up,

check the supply at SLBR relay coil terminals.

A. If the voltage is more than 65V, and still the relay is not picking

up then the SLBR relay is defective. Replace the relay.

B. If the voltage is zero, check the voltage between wire 13 at coil

terminal and wire 4 of locomotive.

a. If the voltage is zero, check the continuity of 13-wire loop

coming to SLBR relay. If necessary replace the open

circuited / wrong wiring.

b. If voltage is more than 65V, check the voltage between

SLBRCL wire and wire 50 of locomotive.

If the voltage is zero, check slackness of connector of

cable (Cable ID: AZ) at MEP-660. If the connector is

slack tighten the same.

ii)

Check continuity of wire SLBRCL from SLBR coil

terminal to MEP-660 (Cable ID: AZ Pin-N). If

necessary replace the cable.

iii)

If continuity of wire SLBRCL is OK and still the

voltage is zero, MLSD 16 card in slot 15 might be

defective. Replace the MLSD 16 card.

If SLBR is picked up and none of the SLBC contactors picked up,

Check the supply across any magnet valve of SLBC contactor.

A. If the voltage is more than 65V, check for control air pressure.

If it is less than 5 Kg/cm″ adjust the conttol air pressure to 5

Kg/cm″.

B. Check up voltage across other magnet calve coils of SLBC

contactors.

a. If voltage is zero, check the voltage between wire 13SLB

and wire 4 of locomotive.

b. If voltage is zero, SLBR interlock is bad or supply to 13 is

missing. Identify wrong wiring or replace SLBR relay if

168

necessary.

3. If SLBR is in pickd up condition and any of the SLBC contactor is

not picked up, concerned SLBR interlock is bad or 13SLB wire loop

is missing. Identify and rectify.

4. If the SLBR relay and all SLBC contactors are picking up, then

check the voltage between wire 51 at SLBC interlocks and wire 4 of

locomotive.

A. If voltage is zero, 51-wire loop is defective. Identify and

replace the wrong wiring.

B. If voltage is more than 65 volts, check the following:

a. Check the slackness of connector of cable ID: AX, if slack

tighten the connector.

b. Check the continuity of wire SLBCFB from SLBC aux.

Interlock to pin -P of connector ID: AX. If no continuity,

replace the cable.

c. Check the status of LED-13 on MDIP16 card in slot -12. If

LED is OFF, inspite of continuity is OK and connector is tight

then MDIP16 card in slot-12 might be defective. Replace the

MDIP16 card in slot-12.

169

PARAMETER

DESCRIPTION

FAULT CODE

1158

FAULT MESSAGE

AEB Applied Brake

Move master controller Handle to IDLE

And Press AEB Reset to release Brake

RESTRICTIONS

Motoring not permitted till the master handle is brought to IDLE and

loco speed is dropped below 10 Kmph (set value).

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the loco speed is dropped below 10 kmph (set value)

RECOVERY

and master handle is brought to IDLE.

PROBABLE

Actually this is not a fault in the locomotive performance. This is a

CAUSES

warning message to driver that penalty brakes are applied due to Loco

speed is increased beyond the set limit and ‘Auto Emergency Brake

system’ feature is enabled.

Whenthis feature is enabled, Driver should control the loco speed

within the set limit other wise system initiates penalty brakes.

FAULT

Bring the master handle to IDLE.

ISOLATION

Wait till loco speed is dropped below 10 kmph (User settable) and

Press AEB reset push button to release penalty brakes.

170

PARAMETER

DESCRIPTION

FAULT CODE

1159

FAULT MESSAGE

Engine Speed Sensor1 faulty.

Running with MCBG communication

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the engine RPM signal is sensed normally from Engine

RECOVERY

Speed Sensor 1.

PROBABLE

Engine Speed Sensor 1 faulty.

CAUSES

Defective SSI unit.

Defective cables.

Defective RDB / FDB.

Defective MFIP16 card.

FAULT

Shut down the engine and reset the fault manually.

ISOLATION

Check the welding condition of the ESS weld nut on the cam gear

cover. If weld nut is slack or welding crack, remove the cam gear

and attend the welding.

Check for any slackness in the ESS fitment. If so, remove the ESS

and adjust the gap as per the Instruction manual of Doc No: IM 46

Switch OFF MPCB breaker and remove ESS1 cable connector at SSI

unit / RDB (Version 1.0 locos). Check the continuity of wires in the

ESS1 cable and ensure no short between pin-to-pin and pin to

ground.

After ensuring cable continuity and no ground fault, reconnect the

cable at SSI unit / RDB.

Switch ON MPCB breaker and measure voltage between pin B & C

of the ESS cable connector. The voltage should be +12V with pin C

positive.

A. If the voltage is zero / less:

a) SSI unit / RDB is defective. Replace the SSI unit / RDB.

B. If voltage is +12V, reconnect the cable connector to ESS.

Ensure tightness of connectors both at ESS and SSI unit

/ RDB.

Crank the engine, check the engine RPM signal on the Display unit.

A. Raise the notch and ensure notch wise engine RPM is showing

correctly on the Display.

B. If engine RPM on Display is erratic / fluctuating / no RPM.

Replace the ESS1. Adjust the air gap as per the above-referred

Maintenance Insturctions manual.

Repeat point 7 and check the Engine RPM on Display unit.

A. If engine RPM on Display is erratic / fluctuating / no RPM.

MFIP16 card might be defective. Replace the card and repeat

point 7.

171

PARAMETER

DESCRIPTION

FAULT CODE

1160

FAULT MESSAGE

Engine Speed Sensor 2 faulty.

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the engine RPM signal is sensed normally from Engine

RECOVERY

Speed Sensor 2.

PROBABLE

Engine Speed Sensor 2 faulty.

CAUSES

Defective SSI unit.

Defective cables.

Defective RDB / FDB.

Defective MFIP16 card.

FAULT

Shut down the engine and reset the fault manually.

ISOLATION

Check the welding condition of the ESS2 weld nut on the cam gear

cover. If weld nut is slack or welding crack, remove the cam gear

cover and attend the welding.

Check for any slackness in the ESS2 fitment. If so, remove the

ESS2 and adjust the gap as per the Instruction manual of Doc No:

IM 46.

Switch OFF MPCB breaker and remove ESS2 cable connector at SSI

unit / RDB (Version 1.0 locos). Check the continuity of wires in the

ESS2 cable and ensure no short between pin-to-pin and pin to

ground.

After ensuring cable continuity and no ground fault, reconnect the

cable at SSI unit / RDB.

Switch ON MPCB breaker and measure voltage between pin B & C

of the ESS2 cable connector at ESS2 end. The voltage should be

+12V with pin C positive.

A. If the voltage is zero / less:

a) SSI unit / RDB is defective. Replace the SSI unit / RDB.

B. If voltage is +12V, reconnect the cable connector to ESS2.

Ensure tightness of connectors both at ESS2 and SSI unit

RDB.

Crank the engine, check the engine RPM signal on the Display unit.

A. Raise the notch and ensure notch wise engine RPM is showing

correctly on the Display.

B. If engine RPM on Display is erratic / fluctuating / no RPM.

Replace the ESS2. Adjust the air gap as per the above-referred

Maintenance Insturctions manual.

Repeat point 7 and check the Engine RPM on Display unit.

A. If engine RPM on Display is erratic / fluctuating / no RPM.

MFIP16 card might be defective. Replace the card and repeat

point 7.

172

PARAMETER

DESCRIPTION

FAULT CODE

1165

FAULT MESSAGE

BKT Contact Open for Traction Motor 1 in Dynamic Braking

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when current detected through corresponding Traction Motor

RECOVERY

current sensor (TM # AI).

PROBABLE

Any open circuit in the grid circuit of TM1 will log this during Dynamic

CAUSES

Braking.

1. Grid resistor open circuit / connecting cables open circuited.

2. Open circuit of BKT contact in TM1 grid circuit.

3. Open circuit of TM1 armature.

4. Defective current sensor.

5. Defective inter connecting cables.

6. Defective ADB module.

7. Defective MAIP8_WS card.

FAULT

1. Download the fault data pack and ensure there is no ‘Traction Motor

ISOLATION

1 Current Sensor faulty’ message after the above message. If the

message is logged, trouble shoot as per fault code 1189.

2. Check for TM1 circuit open fault message logged after the above

message. If the message is logged trouble shoot as per fault code

1055.

3. If there is no TM1 Current Sensor faulty message:

A. Check the continuity of grid resistor, identify and replace the

open circuited grid resistor.

B. Check for any over heated / burnt cable connections at grid

resistors and BKT contacts. Replace any burnt / over heated grid

cables.

C. Check for any foreign insulating material in between BKT

contacts. Remove foreign material.

D. Manually operate BKT to Braking side and observe the contacts

for proper closing. If any contact is not closing, in Braking side

attend to BKT contacts. If necessary replace BKT.

173

PARAMETER

DESCRIPTION

FAULT CODE

1166

FAULT MESSAGE

BKT Contact Open for Traction Motor 2 in Dynamic Braking

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when current detected through corresponding Traction Motor

RECOVERY

current sensor (TM # AI).

PROBABLE

Any open circuit in the grid circuit of TM2 will log this during Dynamic

CAUSES

Braking.

1. Grid resistor open circuit / connecting cables open circuited.

2. Open circuit of BKT contact in TM2 grid circuit.

3. Open circuit of TM2 armature.

4. Defective current sensor.

5. Defective inter connecting cables.

6. Defective ADB module.

7. Defective MAIP8_WS card.

FAULT

1. Download the fault data pack and ensure there is no ‘Traction Motor

ISOLATION

2 Current Sensor faulty’ message after the above message. If the

message is logged, trouble shoot as per fault code 1190.

2. Check for TM2 circuit open fault message logged after the above

message. If the message is logged trouble shoot as per fault code

1056.

3. If there is no TM2 Current Sensor faulty message:

A. Check the continuity of grid resistor, identify and replace the

open circuited grid resistor.

B. Check for any over heated / burnt cable connections at grid

resistors and BKT contacts. Replace any burnt / over heated grid

cables.

C. Check for any foreign insulating material in between BKT

contacts. Remove foreign material.

D. Manually operate BKT to Braking side and observe the contacts

for proper closing. If any contact is not closing, in Braking side

attend to BKT contacts. If necessary replace BKT.

174

PARAMETER

DESCRIPTION

FAULT CODE

1167

FAULT MESSAGE

BKT Contact Open for Traction Motor 3 in Dynamic Braking

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when current detected through corresponding Traction Motor

RECOVERY

current sensor (TM # AI).

PROBABLE

Any open circuit in the grid circuit of TM3 will log this during Dynamic

CAUSES

Braking.

1. Grid resistor open circuit / connecting cables open circuited.

2. Open circuit of BKT contact in TM3 grid circuit.

3. Open circuit of TM3 armature.

4. Defective current sensor.

5. Defective inter connecting cables.

6. Defective ADB module.

7. Defective MAIP8_WS card.

FAULT

1. Download the fault data pack and ensure there is no ‘Traction Motor

ISOLATION

3 Current Sensor faulty’ message after the above message. If the

message is logged, trouble shoot as per fault code 1191.

2. Check for TM3 circuit open fault message logged after the above

message. If the message is logged trouble shoot as per fault code

1057.

3. If there is no TM3 Current Sensor faulty message:

A. Check the continuity of grid resistor, identify and replace the

open circuited grid resistor.

B. Check for any over heated / burnt cable connections at grid

resistors and BKT contacts. Replace any burnt / over heated grid

cables.

C. Check for any foreign insulating material in between BKT

contacts. Remove foreign material.

D. Manually operate BKT to Braking side and observe the contacts

for proper closing. If any contact is not closing, in Braking side

attend to BKT contacts. If necessary replace BKT.

175

PARAMETER

DESCRIPTION

FAULT CODE

1168

FAULT MESSAGE

BKT Contact Open for Traction Motor 4 in Dynamic Braking

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when current detected through corresponding Traction Motor

RECOVERY

current sensor (TM # AI).

PROBABLE

Any open circuit in the grid circuit of TM4 will log this during Dynamic

CAUSES

Braking.

1. Grid resistor open circuit / connecting cables open circuited.

2. Open circuit of BKT contact in TM4 grid circuit.

3. Open circuit of TM4 armature.

4. Defective current sensor.

5. Defective inter connecting cables.

6. Defective ADB module.

7. Defective MAIP8_WS card.

FAULT

1. Download the fault data pack and ensure there is no ‘Traction Motor

ISOLATION

4 Current Sensor faulty’ message after the above message. If the

message is logged, trouble shoot as per fault code 1192.

2. Check for TM4 circuit open fault message logged after the above

message. If the message is logged trouble shoot as per fault code

1058.

3. If there is no TM4 Current Sensor faulty message:

A. Check the continuity of grid resistor, identify and replace the

open circuited grid resistor.

B. Check for any over heated / burnt cable connections at grid

resistors and BKT contacts. Replace any burnt / over heated grid

cables.

C. Check for any foreign insulating material in between BKT

contacts. Remove foreign material.

D. Manually operate BKT to Braking side and observe the contacts

for proper closing. If any contact is not closing, in Braking side

attend to BKT contacts. If necessary replace BKT.

176

PARAMETER

DESCRIPTION

FAULT CODE

1169

FAULT MESSAGE

BKT Contact Open for Traction Motor 5 in Dynamic Braking

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when current detected through corresponding Traction Motor

RECOVERY

current sensor (TM # AI).

PROBABLE

Any open circuit in the grid circuit of TM5 will log this during Dynamic

CAUSES

Braking.

1. Grid resistor open circuit / connecting cables open circuited.

2. Open circuit of BKT contact in TM5 grid circuit.

3. Open circuit of TM5 armature.

4. Defective current sensor.

5. Defective inter connecting cables.

6. Defective ADB module.

7. Defective MAIP8_WS card.

FAULT

1. Download the fault data pack and ensure there is no ‘Traction Motor

ISOLATION

5 Current Sensor faulty’ message after the above message. If the

message is logged, trouble shoot as per fault code 1193.

2. Check for TM5 circuit open fault message logged after the above

message. If the message is logged trouble shoot as per fault code

1059.

3. If there is no TM5 Current Sensor faulty message:

A. Check the continuity of grid resistor, identify and replace the

open circuited grid resistor.

B. Check for any over heated / burnt cable connections at grid

resistors and BKT contacts. Replace any burnt / over heated grid

cables.

C. Check for any foreign insulating material in between BKT

contacts. Remove foreign material.

D. Manually operate BKT to Braking side and observe the contacts

for proper closing. If any contact is not closing, in Braking side

attend to BKT contacts. If necessary replace BKT.

177

PARAMETER

DESCRIPTION

FAULT CODE

1170

FAULT MESSAGE

BKT Contact Open for Traction Motor 6 in Dynamic Braking

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

LOW, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when current detected through corresponding Traction Motor

RECOVERY

current sensor (TM # AI).

PROBABLE

Any open circuit in the grid circuit of TM6 will log this during Dynamic

CAUSES

Braking.

1. Grid resistor open circuit / connecting cables open circuited.

2. Open circuit of BKT contact in TM6 grid circuit.

3. Open circuit of TM6 armature.

4. Defective current sensor.

5. Defective inter connecting cables.

6. Defective ADB module.

7. Defective MAIP8_WS card.

FAULT

1. Download the fault data pack and ensure there is no ‘Traction Motor

ISOLATION

6 Current Sensor faulty’ message after the above message. If the

message is logged, trouble shoot as per fault code 1194.

2. Check for TM6 circuit open fault message logged after the above

message. If the message is logged trouble shoot as per fault code

1060.

3. If there is no TM6 Current Sensor faulty message:

A. Check the continuity of grid resistor, identify and replace the

open circuited grid resistor.

B. Check for any over heated / burnt cable connections at grid

resistors and BKT contacts. Replace any burnt / over heated grid

cables.

C. Check for any foreign insulating material in between BKT

contacts. Remove foreign material.

D. Manually operate BKT to Braking side and observe the contacts

for proper closing. If any contact is not closing, in Braking side

attend to BKT contacts. If necessary replace BKT.

178

4.0. LOW PRIORITY FAULTS

PARAMETER

DESCRIPTION

FAULT CODE

1173

FAULT MESSAGE

Alternator Voltage Sensor Faulty

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

MEDIUM, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the Alternator voltage Sensor is detected normal.

RECOVERY

PROBABLE

Defective voltage sensor TAV.

CAUSES

Defective cables.

Defective ADB3

Defective MAIP8_EP card in slot No. 7.

FAULT

Remove the cable connector at the sensor.

ISOLATION

Measure voltage between pin B and pin A. The voltage should be

24V with pin A positive.

Measure voltage between pin B and pin C. The voltage should be

24V with pin B positive.

If any of the above voltages is zero or less:

A. Remove sensor cable connector on ADB3 with cable ID: T.

B. Measure voltages between pins A, B and C.

a) If voltage between B & A is less than 24V or voltage between

B & C is less than 24V, ADB3 is defective. Replace the ADB.

b) If the voltages are +24V between pins B & A and -24V

between pins B & C, The interconnecting cable between ADB

and sensor with cable ID: T is defective.

If +24V and -24V supply is available at the connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors at ADB and MEP-660 control unit with

cable ID: AA might be slack. Check and tighten the connectors.

C. The cable with ID: AA may be defective. Replace the cable and

check up.

D. MAIP8_EP card might be defective. Replace the card and check

up.

179

PARAMETER

DESCRIPTION

FAULT CODE

1174

FAULT MESSAGE

EP Analogue DB Power Supply FAULTY

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

MEDIUM, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the EP analogue DB power supply is detected to

RECOVERY

normal.

PROBABLE

Most probably this fault accompany with ‘xxxxx sensor faulty’ for the

CAUSES

sensors connected to the ADB3 faulty.

1. Defective Analog distribution box.

2. Defective wiring.

FAULT

1. Replace the ADB and check up

ISOLATION

2. Replace the cable ID: AB and check up.

3. Check for disconnected wires at back side TB for the wire No. PSH3.

4. Check the continuity of wire PSH3 from TB to the Cable connector

(Cable ID: AW Pin - C). If necessary replace the cable.

5. Check the status of the Green LED 4 on the digital input card

MDIP16 in slot No. 12.

6. If the green LED glowing and corresponding Yellow LED 4 is not

glowing the digital input card MDIP16 is defective. Replace and

check up.

180

PARAMETER

DESCRIPTION

FAULT CODE

1175

FAULT MESSAGE

Alternator Field Current Sensor Faulty

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

MEDIUM, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the MEP-660 detects the alternator field current

RECOVERY

sensor EXAI working normal.

PROBABLE

1. EXAI current sensor faulty.

CAUSES

2. Defective cables

3. Defective ADB3

4. Defective MAIP8_EP card in slot 7.

FAULT

1. Remove the cable connector at the sensor.

ISOLATION

2. Measure voltage between pin B & A of the cable connector. The

voltage should be 24V with pin A positive. (+24V)

3. Measure voltage between pin B & C of the cable connector. The

voltage should be 24V with pin B positive. (-24V)

4. If any of the above voltages (+24V) or (-24V) is zero / less:

A. Remove sensor cable connector on ADB3 with cable ID: U.

B. Measure voltages between pins A, B and C of the ADB

connector.

a) If voltage between B & A is less than 24V or voltage between

B & C is less than 24V, ADB3 is defective. Replace the ADB.

b) If the voltages between pins B&A is +24V and voltage

between pins B & C is -24V, the interconnecting cable

between ADB and sensor with cable ID: U is defective.

5. If +24V and -24V supply is available at the sensor cable connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors at ADB and MEP-660 control unit with

cable ID: AA may be slack. Check and tighten the connectors.

C. The cable with ID: AA may be defective. Replace the cable and

check up.

D. MAIP8_EP card might be defective. Replace the card and check

up.

181

PARAMETER

DESCRIPTION

FAULT CODE

1176

FAULT MESSAGE

Exciter Field Current Sensor Faulty

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

MEDIUM, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the MEP-660 detects the Exciter field current sensor

RECOVERY

EXFI working normal.

PROBABLE

EXFI current sensor faulty.

CAUSES

Defective cables

Defective ADB3

Defective MAIP8_EP card in slot 7.

FAULT

Remove the cable connector at the sensor.

ISOLATION

Measure voltage between pin B & A of the cable connector. The

voltage should be 24V with pin a positive. (+24V)

Measure voltage between pin B & C of the cable connector. The

voltage should be 24V with pin B positive. (-24V)

If any of the above voltages (+24V) or (-24V) is zero / less:

A. Remove sensor cable connector on ADB3 with cable ID: V.

B. Measure voltages between pins A, B and C of the ADB

connector.

a) If voltage between B & A is less than 24V or voltage between

B & C is less than 24V, ADB3 is defective. Replace the ADB.

b) If the voltages between pins B&A is +24V and voltage

between pins B & C is -24V, the interconnecting cable

between ADB and sensor with cable ID: V is defective.

If +24V and -24V supply is available at the sensor cable connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors at ADB and MEP-660 control unit with

cable ID: AA may be slack. Check and tighten the connectors.

C. The cable with ID: AA may be defective. Replace the cable and

check up.

D. MAIP8_EP card might be defective. Replace the card and check

up.

182

PARAMETER

DESCRIPTION

FAULT CODE

1177

FAULT MESSAGE

Engine Tacho Output Noisy

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

High, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Manual only

RECOVERY

PROBABLE

1. Noisy output from tacho generator continuously.

CAUSES

FAULT

1. Reset the fault manually.

ISOLATION

2. Check up the tacho generator for any loose connections or loose

magnets on the rotor etc. Replace the tacho generator if necessary.

PARAMETER

DESCRIPTION

FAULT CODE

1178

FAULT MESSAGE

Engine Tacho Output Noisy

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

High, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Manual only

RECOVERY

PROBABLE

1. Noisy output from tacho generator.

CAUSES

FAULT

1. Reset the fault manually.

ISOLATION

2. Check up the tacho generator for any loose connections or loose

magnets on the rotor etc. Replace the tacho generator if necessary.

183

PARAMETER

DESCRIPTION

FAULT CODE

1179

FAULT MESSAGE

MCU EEPROM Faulty. Default CFG record loaded

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

High, Manual

FAULT

RECOVERY

PROBABLE

This fault will be logged while switching on the supply. Loco will work

CAUSES

with default parameters.

FAULT

ISOLATION

PARAMETER

DESCRIPTION

FAULT CODE

1180

FAULT MESSAGE

MCU EEPROM Write Error at Power Off. Last MCU Fault Cleared.

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

High, Manual

FAULT

RECOVERY

PROBABLE

System is switched off while writing the fault message on the EEPROM.

CAUSES

FAULT

ISOLATION

184

PARAMETER

DESCRIPTION

FAULT CODE

1181

FAULT MESSAGE

WS EEPROM Faulty. Default CFG record loaded

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

High, Manual

FAULT

RECOVERY

PROBABLE

This fault will be logged while switching ON power supply. Loco can

CAUSES

work with default parameters.

FAULT

ISOLATION

PARAMETER

DESCRIPTION

FAULT CODE

1182

FAULT MESSAGE

WS Analogue DB Power Supply FAULTY

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

MEDIUM, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the WS analogue DB power supply is detected to

RECOVERY

normal.

PROBABLE

Most probably this fault accompany with associated sensors

CAUSES

(Connected to the ADB2) faulty.

1. Defective Analog distribution box.

2. Defective wiring.

FAULT

1. Replace the ADB and check up

ISOLATION

2. Replace the cable ID:I and check up.

3. Check for disconnected wires at backside TB for the wire No. PSH2.

4. Check the continuity of wire PSH2 from TB to the Cable connector

(Cable ID:I Pin - C). If necessary replace the cable.

5. Check the status of the Green LED 5 on the digital input card

MDIP16 in slot No. 12.

6. If the green LED glowing and corresponding Yellow LED 5 is not

glowing the digital input card MDIP16 is defective. Replace and

check up.

185

PARAMETER

DESCRIPTION

FAULT CODE

1183

FAULT MESSAGE

Traction Alternator Current Sensor Faulty.

RESTRICTIONS

Dynamic brake prohibited

ALARM BELL

RESET LEVEL

MEDIUM, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the Tr. Alternator current sensor TAAI is detected as

RECOVERY

working normal.

PROBABLE

TAAI current sensor faulty.

CAUSES

Defective cables

Defective ADB3

Defective MAIP8_EP card in slot 7.

FAULT

Set the locomotive to motoring mode with brakes applied and notch

ISOLATION

1. Record the Tr. Alternator current TA Amps on the display. Bring

the Throttle to notch IDLE.

Set the display mode to ‘Wheel Slip’ under ‘Display’ menu available

in the main menu. Bring the notch to 1. Record all the 6 traction

motor currents.

If sum of all the T.M currents is more or less equal to Tr. Alternator

current, the fault could be a transient.

If Tr.Alternator current is zero or excess to the sum of Tr.Motor

currents then:

Remove the cable connector at the sensor.

Measure voltage between pin B & A of the cable connector. The

voltage should be 24V with pin A positive. (+24V)

Measure voltage between pin B & C of the cable connector. The

voltage should be 24V with pin B positive. (-24V)

If any of the above voltages (+24V) or (-24V) is zero / less:

A. Remove sensor cable connector on ADB3 with cable ID: S.

B. Measure voltages between pins A, B and C of the ADB

connector.

a) If voltage between B & A is less than 24V or voltage between

B & C is less than 24V, ADB3 is defective. Replace the ADB.

b) If the voltages between pins B&A is +24V and voltage

between pins B & C is -24V, the interconnecting cable

between ADB and sensor with cable ID: S is defective.

If +24V and -24V supply is available at the sensor cable connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors at ADB and MEP-660 control unit with

cable ID: AA may be slack. Check and tighten the connectors.

C. The cable with ID: AA may be defective. Replace the cable and

check up.

D. MAIP8_EP card might be defective. Replace the card and check

up.

186

PARAMETER

DESCRIPTION

FAULT CODE

1184

FAULT MESSAGE

Frequency DB Power Supply FAULTY

RESTRICTIONS

Warning only

ALARM BELL

RESET LEVEL

MEDIUM, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the Frequency analogue DB (RDB) power supply is

RECOVERY

detected to normal.

PROBABLE

Most probably this fault accompany with associated sensors

CAUSES

(Connected to the RDB) faulty.

1. Defective Analog distribution box.

2. Defective wiring.

FAULT

1. Replace the RDB and check up

ISOLATION

2. Replace the cable ID: Q and check up.

3. Check for disconnected wires at back side TB for the wire No. PSH4.

4. Check the continuity of wire PSH4 from TB to the Cable connector

(Cable ID: AW Pin - C). If necessary replace the cable.

5. Check the status of the Green LED 7 on the digital input card

MDIP16 in slot No. 12.

6. If the Green LED glowing and corresponding Yellow LED 7 is not

glowing the digital input card MDIP16 is defective. Replace and

check up.

PARAMETER

DESCRIPTION

FAULT CODE

1185

FAULT MESSAGE

WS EEPROM Faulty. All WS Faults Cleared.

RESTRICTIONS

ALARM BELL

5 sec.

RESET LEVEL

High, Manual

FAULT

RECOVERY

PROBABLE

System detected fault while writing the faults on EEPROM.

CAUSES

FAULT

ISOLATION

187

PARAMETER

DESCRIPTION

FAULT CODE

1189

FAULT MESSAGE

Traction motor 1 current sensor faulty

RESTRICTIONS

Dynamic braking

ALARM BELL

RESET LEVEL

Medium, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the Tr.Motor current sensor detected working normal.

RECOVERY

PROBABLE

T.M. current sensor TM1AI sensor faulty.

CAUSES

Defective cables

Defective ADB2

Defective MAIP8_WS card in slot 6.

FAULT

Remove the cable connector at the sensor.

ISOLATION

Measure voltage between pin B & A of the cable connector. The

voltage should be 24V with pin A positive. (+24V)

Measure voltage between pin B & C of the cable connector. The

voltage should be 24V with pin B positive. (-24V)

If any of the above voltages (+24V) or (-24V) is zero / less:

A. Remove sensor cable connector on ADB2 with cable ID: A.

B. Measure voltages between pins A, B and C of the ADB2

connector.

a) If voltage between B & A is less than +24V or voltage

between B & C is less than -24V, ADB2 is defective. Replace

the ADB2.

b) If the voltages between pins B&A is +24V and voltage

between pins B & C is -24V, the interconnecting cable

between ADB and sensor with cable ID: A is defective.

If +24V and -24V supply is available at the sensor cable connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors between ADB2 and MEP-660 control unit

with cable ID: G may be slack. Check and tighten the

connectors.

C. The cable with ID: G may be defective. Replace the cable and

check up.

D. MAIP8_WS card might be defective. Replace the card and check

up.

189

PARAMETER

DESCRIPTION

FAULT CODE

1190

FAULT MESSAGE

Traction motor 2 current sensor faulty

RESTRICTIONS

Dynamic braking

ALARM BELL

RESET LEVEL

Medium, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the Tr.Motor current sensor detected working normal.

RECOVERY

PROBABLE

T.M. current sensor TM2AI sensor faulty.

CAUSES

Defective cables

Defective ADB2

Defective MAIP8_WS card in slot 6.

FAULT

Remove the cable connector at the sensor.

ISOLATION

Measure voltage between pin B & A of the cable connector. The

voltage should be 24V with pin A positive. (+24V)

Measure voltage between pin B & C of the cable connector. The

voltage should be 24V with pin B positive. (-24V)

If any of the above voltages (+24V) or (-24V) is zero / less:

A. Remove sensor cable connector on ADB2 with cable ID: B.

B. Measure voltages between pins A, B and C of the ADB2

connector.

a) If voltage between B & A is less than +24V or voltage

between B & C is less than -24V, ADB2 is defective. Replace

the ADB2.

b) If the voltages between pins B&A is +24V and voltage

between pins B & C is -24V, the interconnecting cable

between ADB and sensor with cable ID: B is defective.

If +24V and -24V supply is available at the sensor cable connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors between ADB2 and MEP-660 control unit

with cable ID: G may be slack. Check and tighten the

connectors.

C. The cable with ID: G may be defective. Replace the cable and

check up.

D. MAIP8_WS card might be defective. Replace the card and check

up.

190

PARAMETER

DESCRIPTION

FAULT CODE

1191

FAULT MESSAGE

Traction motor 3 current sensor faulty

RESTRICTIONS

Dynamic braking

ALARM BELL

RESET LEVEL

Medium, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the Tr.Motor current sensor detected working normal.

RECOVERY

PROBABLE

T.M. current sensor TM3AI sensor faulty.

CAUSES

Defective cables

Defective ADB2

Defective MAIP8_WS card in slot 6.

FAULT

Remove the cable connector at the sensor.

ISOLATION

Measure voltage between pin B & A of the cable connector. The

voltage should be 24V with pin A positive. (+24V)

Measure voltage between pin B & C of the cable connector. The

voltage should be 24V with pin B positive. (-24V)

If any of the above voltages (+24V) or (-24V) is zero / less:

A. Remove sensor cable connector on ADB2 with cable ID: C.

B. Measure voltages between pins A, B and C of the ADB2

connector.

a) If voltage between B & A is less than +24V or voltage

between B & C is less than -24V, ADB2 is defective. Replace

the ADB2.

b) If the voltages between pins B&A is +24V and voltage

between pins B & C is -24V, the interconnecting cable

between ADB and sensor with cable ID: C is defective.

If +24V and -24V supply is available at the sensor cable connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors between ADB2 and MEP-660 control unit

with cable ID: G may be slack. Check and tighten the

connectors.

C. The cable with ID: G may be defective. Replace the cable and

check up.

D. MAIP8_WS card might be defective. Replace the card and check

up.

191

PARAMETER

DESCRIPTION

FAULT CODE

1192

FAULT MESSAGE

Traction motor 4 current sensor faulty

RESTRICTIONS

Dynamic braking

ALARM BELL

RESET LEVEL

Medium, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the Tr.Motor current sensor detected working normal.

RECOVERY

PROBABLE

T.M. current sensor TM4AI sensor faulty.

CAUSES

Defective cables

Defective ADB2

Defective MAIP8_WS card in slot 6.

FAULT

Remove the cable connector at the sensor.

ISOLATION

Measure voltage between pin B & A of the cable connector. The

voltage should be 24V with pin A positive. (+24V)

Measure voltage between pin B & C of the cable connector. The

voltage should be 24V with pin B positive. (-24V)

If any of the above voltages (+24V) or (-24V) is zero / less:

A. Remove sensor cable connector on ADB2 with cable ID: D.

B. Measure voltages between pins A, B and C of the ADB2

connector.

a) If voltage between B & A is less than +24V or voltage

between B & C is less than -24V, ADB2 is defective. Replace

the ADB2.

b) If the voltages between pins B&A is +24V and voltage

between pins B & C is -24V, the interconnecting cable

between ADB and sensor with cable ID: D is defective.

If +24V and -24V supply is available at the sensor cable connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors between ADB2 and MEP-660 control unit

with cable ID: G may be slack. Check and tighten the

connectors.

C. The cable with ID: G may be defective. Replace the cable and

check up.

D. MAIP8_WS card might be defective. Replace the card and check

up.

192

PARAMETER

DESCRIPTION

FAULT CODE

1193

FAULT MESSAGE

Traction motor 5 current sensor faulty

RESTRICTIONS

Dynamic braking

ALARM BELL

RESET LEVEL

Medium, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the Tr.Motor current sensor detected working normal.

RECOVERY

PROBABLE

T.M. current sensor TM5AI sensor faulty.

CAUSES

Defective cables

Defective ADB2

Defective MAIP8_WS card in slot 6.

FAULT

Remove the cable connector at the sensor.

ISOLATION

Measure voltage between pin B & A of the cable connector. The

voltage should be 24V with pin A positive. (+24V)

Measure voltage between pin B & C of the cable connector. The

voltage should be 24V with pin B positive. (-24V)

If any of the above voltages (+24V) or (-24V) is zero / less:

A. Remove sensor cable connector on ADB2 with cable ID: E.

B. Measure voltages between pins A, B and C of the ADB2

connector.

a) If voltage between B & A is less than +24V or voltage

between B & C is less than -24V, ADB2 is defective. Replace

the ADB2.

b) If the voltages between pins B&A is +24V and voltage

between pins B & C is -24V, the interconnecting cable

between ADB and sensor with cable ID: E is defective.

If +24V and -24V supply is available at the sensor cable connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors between ADB2 and MEP-660 control unit

with cable ID: G may be slack. Check and tighten the

connectors.

C. The cable with ID: G may be defective. Replace the cable and

check up.

D. MAIP8_WS card might be defective. Replace the card and check

up.

193

PARAMETER

DESCRIPTION

FAULT CODE

1194

FAULT MESSAGE

Traction motor 6 current sensor faulty

RESTRICTIONS

Dynamic braking

ALARM BELL

RESET LEVEL

Medium, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the Tr.Motor current sensor detected working normal.

RECOVERY

PROBABLE

T.M. current sensor TM6AI sensor faulty.

CAUSES

Defective cables

Defective ADB2

Defective MAIP8_WS card in slot 6.

FAULT

Remove the cable connector at the sensor.

ISOLATION

Measure voltage between pin B & A of the cable connector. The

voltage should be 24V with pin A positive. (+24V)

Measure voltage between pin B & C of the cable connector. The

voltage should be 24V with pin B positive. (-24V)

If any of the above voltages (+24V) or (-24V) is zero / less:

A. Remove sensor cable connector on ADB2 with cable ID: F.

B. Measure voltages between pins A, B and C of the ADB2

connector.

a) If voltage between B & A is less than +24V or voltage

between B & C is less than -24V, ADB2 is defective. Replace

the ADB2.

b) If the voltages between pins B&A is +24V and voltage

between pins B & C is -24V, the interconnecting cable

between ADB and sensor with cable ID: F is defective.

If +24V and -24V supply is available at the sensor cable connector,

A. Sensor may be defective. Replace and check.

B. The 19 pin connectors between ADB2 and MEP-660 control unit

with cable ID: G may be slack. Check and tighten the

connectors.

C. The cable with ID: G may be defective. Replace the cable and

check up.

D. MAIP8_WS card might be defective. Replace the card and check

up.

194

PARAMETER

DESCRIPTION

FAULT CODE

1195

FAULT MESSAGE

S1 Auxiliary Contact Stuck Open. Run Auto/Manual Test

RESTRICTIONS

Dynamic braking

ALARM BELL

RESET LEVEL

Low, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the S1 power contactor Aux. Contact closes.

RECOVERY

PROBABLE

Defective Power contactor

CAUSES

Defective wiring.

Defective digital output card MLSD16 in slot No. 14.

Defective digital input card MDIP16 in slot No. 10

FAULT

Set the display mode to ‘Manual Test for outputs’ under ‘Test Mode’

ISOLATION

available in main menu. The display exhibits certain conditions to

be full filled. After that press Enter key to start testing of outputs.

Ensure control air pressure is 5 Kg./Sq.Cm.

Enter 6 against channel no. and then press Enter key to test S1

power contactor. Press 1 to energise the contactor and 0 to de-

energise the contactor.

Press 1 to energise the S1 power contactor.

If the contactor is not picking up. Check the voltage across the

operating coil of the magnet valve.

If the voltage is zero, check the voltage between Wire 13 at the coil

terminal and locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13 wire connected

to the coil terminal.

B. If the voltage is more than 65V, check the voltage between

locomotive 13 wire and S1CL wire at the coil terminal.

C. If the voltage is zero, negative path is not getting completed

through MEP.

a) Check the slackness of the connector at MEP-660 control unit

for the cable ID: AY. If found slack tighten the connector.

b) Check the continuity of wire S1CL from the coil terminal to

the connector of cable ID: AY (pin - G). If necessary replace

the cable.

c) If still voltage is zero, the digital output card MLSD16 in slot

No. 14 might be defective. Replace the card and check once

again.

If the Voltage is more than 65V and still power contactor is not

picking up, then the power contactor or magnet valve or pneumatic

circuit is defective. Identify and replace the component/contactor.

Press 0 to de-energise the power contactor.

While you are toggling the power contactor, check the status of the

Green LED 9 and Yellow LED 9 on the digital input card MDIP16 in

slot 10.

With power contactor energized, Both the LEDs should glow.

10. If the Green LED is not glowing, check the voltage between wire 51

at the power contactor aux. Interlock and locomotive 4 wire.

A. If the voltage is zero, check the continuity of the wire Loop 51

connected to S1 power contactor interlock. Identify faulty wiring

195

and rectify.

B. If the voltage is more than 65V, check the voltage between

S1FB and locomotive 4 wire.

a) If the voltage is zero, the interlock is bad. Replace the

interlock/aux. Contact.

b) If the voltage is more than 65V,

1) Check the slackness of the connector at the MEP660

control unit for the cable ID: AU. If the connector is slack

tighten the connector.

2) Check the continuity of the wire S1FB from the contactor

to the cable (ID: AU) connector pin-K. If necessary

replace the cable.

3) If still Green LED 9 is not glowing, the digital input card

MDIP16 in slot No. 10 defective. Replace the card and

check.

11. If the Green LED 9 is glowing and corresponding yellow LED is not

glowing also, the MDIP16 card is defective.

196

PARAMETER

DESCRIPTION

FAULT CODE

1196

FAULT MESSAGE

S21 Auxiliary Contact Stuck Open. Run Auto/Manual Test

RESTRICTIONS

ALARM BELL

RESET LEVEL

Low, Manual

If the fault condition is still present when cleared manually, the fault

will be generated again.

FAULT

Automatic when the S21 power contactor Aux. Contact closes.

RECOVERY

PROBABLE

Defective Power contactor

CAUSES

Defective wiring.

Defective digital output card MLSD16 in slot No. 14.

Defective digital input card MDIP16 in slot No. 10

FAULT

Set the display mode to ‘Manual Test for outputs’ under ‘Test Mode’

ISOLATION

available in main menu. The display exhibits certain conditions to

be full filled. After that press Enter key to start testing of outputs.

Ensure control air pressure is 5 Kg./Sq.Cm.

Enter 7 against channel no. and then press Enter key to test S21

power contactor. Press 1 to energise the contactor and 0 to de-

energise the contactor.

Press 1 to energise the S21 power contactor.

If the contactor is not picking up. Check the voltage across the

operating coil of the magnet valve.

If the voltage is zero, check the voltage between Wire 13 at the coil

terminal and locomotive 4 wire.

A. If the voltage is zero, check the continuity of 13 wire connected

to the coil terminal.

B. If the voltage is more than 65V, check the voltage between

locomotive 13 wire and S21CL wire at the coil terminal.

C. If the voltage is zero, negative path is not getting completed

through MEP.

a) Check the slackness of the connector at MEP-660 control unit

for the cable ID: AY. If found slack tighten the connector.

b) Check the continuity of wire S21CL from the coil terminal to

the connector of cable ID: AY (pin - H). If necessary replace

the cable.

c) If still voltage is zero, the digital output card MLSD16 in slot

No. 14 might be defective. Replace the card and check once

again.

If the Voltage is more than 65V and still power contactor is not

picking up, then the power contactor or magnet valve or pneumatic

circuit is defective. Identify and replace the component/contactor.

Press 0 to de-energise the power contactor.

While you are toggling the power contactor, check the status of the

Green LED 10 and Yellow LED 10 on the digital input card MDIP16

in slot 10.

With power contactor energized, Both the LEDs should glow.

10. If the Green LED is not glowing, check the voltage between wire 51

at the power contactor aux. Interlock and locomotive 4 wire.

A. If the voltage is zero, check the continuity of the wire Loop 51

connected to S21 power contactor interlock. Identify faulty

197

Medha MEP 660. Troubleshooting Manual (2008) - page 2