Volkswagen Golf Variant / Jetta. Manual - part 470

-1-.
With the “standard charge”, parallel operation of electrical con‐

sumers during the charging process is possible. The charging

time is lengthened by this.
Depending on the battery type, the Battery Charger - VAS5900-

switches to maintenance charging after 1 to 7 hours. To reach a

100% charge level, the Battery - A- should remain connected to

the Battery Charger - VAS5900- .
Possible malfunctions and how they are handled
1 - Displayed voltage does not match the nominal voltage:
– Hold down the

↑

button or

↓

button until the charging process

begins.

2 - Displayed battery voltage does not match the nominal volt‐

age - the charging process has already begun:

– Press the

START/STOP

button two times.

– Hold down the

↑

button or

↓

button until the charging process

begins again.

3 - The Battery Charger - VAS5900- does not recognize the

Battery - A- , if the battery voltage is less than 2V:

The display remains unchanged.
The selected battery type and Ampere hours (Ah) are displayed.
Battery - A- charging, ending
– Press the

START/STOP

-button.

– Remove the charging clamps from the battery terminals.
– Disconnect the Battery Charger - VAS5900- from the power.

3.2.4

Battery Charger - VAS5900- Service

Charge

Special tools and workshop equipment required
♦ Battery Charger - VAS5900-

WARNING

Risk of injury. Follow all warning messages and safety pre‐

cautions.

Refer

⇒ “1.3 Warnings and Safety Precautions”, page 3

Caution

“Service charging” is not permitted for VW vehicles, because

voltage surges can damage the on-board electronics.
The Battery - A- must always be disconnected from the vehicle

electrical system when using the “service charge” mode.

Beetle 2012 ➤ , Golf 2015 ➤ , Golf Variant 2007 ➤ , Golf Variant 2010 ➤ ...

Do not check or charge a Battery - A- when the visual indicator

has »no color or is bright yellow«. Jump starting must not be

used!
There is a risk of explosion during testing, charging or jump

starting.
These Batteries - A- must be replaced.

Caution

Always set the mode that corresponds to the Battery - A- during

the charging process. Refer to the Battery Charger - VAS5900-

Operating Instructions.
“Service Charging” is suitable for:

♦ Wet batteries having a visual indicator which allows charg‐

ing (visual indicator black or green).

The “Service charge (SERV)” mode is only used with sulfated

Batteries - A- . The Battery - A- with voltages greater than 14.4 V

is charged. A partial removal of the sulfation layer can result from

this. Check the visual indicator after charging, immediately before

the Battery - A- is used. Refer to

⇒ “2.3 Color Display in Battery Cover, Checking, Visual Indicator”,

page 10

Note

The Battery - A- temperature must be at least 10 °C.

Procedure
– Turn off the ignition and all electrical consumers and remove

the ignition key.

– Connect the Battery Charger - VAS5900- to the power supply.

The last selected mode is shown on the display. Refer to

⇒ “3.2.2 Battery Charger VAS5900 Device Description”, page

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3. Battery, Charging

INFO

button.

The symbol -1- for “service charge of wet batteries” or the symbol

-2- for “service charge of Gel/Absorbent Glass Mat (AGM) bat‐

teries” is indicated in the display.
– Set the battery capacity (Ah) on the Battery - A- to be charged

with the corresponding

↑

button or

↓

button.

– Connect the red charge terminal (+) to the positive terminal of

the Battery - A- .

Note

On vehicles with a Start/Stop function and an installed Battery

Monitoring Control Module - J367- , the black charge terminal (-)

must be connected to the body ground. The Start/Stop system

will malfunction when it is connected to the Battery - A- negative

terminal.

– Connect the black charge terminal (-) to the negative terminal

of the Battery - A- /negative connector.

The Battery Charger - VAS5900- recognizes the nominal voltage

of the connected Battery - A- (6 V/12 V/24 V) and begins the

charging process automatically.

The Battery Charger - VAS5900- begins the “final charging” when

the charge level is approximately 80 to 85% of the battery voltage.

The fourth bar is indicated on the display -1-. The Battery - A- is

now ready to be used.

Note

A successful “service charge” depends on the degree of sulfation

on the Battery - A- .

Possible malfunctions and how they are handled
1 - Displayed voltage does not match the nominal voltage:
– Hold down the

↑

button or

↓

button until the charging process

begins.

2 - Displayed battery voltage does not match the nominal volt‐

age - the charging process has already begun:

– Press the

START/STOP

button two times.

– Hold down the

↑

button or

↓

button until the charging process

begins.

3 - The charger does not recognize a Battery - A- , when the

battery voltage is less than 2 V:

The display remains unchanged.
The set operating mode and Ampere-hours (Ah) are displayed.
Battery - A- charging, ending
– Press the

START/STOP

-button.

– Remove the charging clamps from the battery terminals.
– Disconnect the Battery Charger - VAS5900- from the power.

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Severely Discharged Battery, Charging

with Battery Charger - VAS5900-

Special tools and workshop equipment required
♦ Battery Charger - VAS5900-

WARNING

Risk of injury. Follow all warning messages and safety pre‐

cautions.

Refer

⇒ “1.3 Warnings and Safety Precautions”, page 3

WARNING

Do not check or charge a Battery - A- when the visual indicator

has »no color or is bright yellow«. Jump starting must not be

used!
There is a risk of explosion during testing, charging or jump

starting.
These Batteries - A- must be replaced.

Caution

♦ The polarity protection of the charger clamps is not active

in the operation mode “charging severely discharged bat‐

teries/Support mode”. Connect the charger clamps to the

battery terminals correctly according to polarity!

♦ Always set the mode that corresponds to the Battery - A-

during the charging process. Refer to the Battery Charger

- VAS5900- Operating Instructions.

♦ The Battery Charger - VAS5900- does not recognize the

severely discharged Battery - A- . Refer to

⇒ “3.7 Severely Discharged Batteries”, page 68

♦ Do not touch

START/STOP

button when battery cables are

incorrectly connected! The Battery Charger - VAS5900-

can become damaged.

The Battery Charger - VAS5900- will not automatically recognize

the Battery - A- for Batteries - A- with a voltage less than 2 V.

Note

♦

For information. Refer to the chapter

⇒ “3.7 Severely Discharged Batteries”, page 68

♦

The Battery - A- temperature must be at least 10 °C.

♦

Severely discharged batteries in vehicles must be replaced

prior to delivery. Pre-existing damage cannot be ruled out.

Procedure
– Turn off the ignition and all electrical consumers and remove

the ignition key.

– Connect the Battery Charger - VAS5900- to the power supply.

The last selected mode is shown on the display. Refer to

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3. Battery, Charging

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