Volkswagen Corrado (1993 year). Manual - part 94

 

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Volkswagen Corrado (1993 year). Manual - part 94

 

 

A/C SYSTEM GENERAL SERVICING 

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         REFRIGERANT RECOVERY/RECYCLING

         Refrigerant recovery/recycling equipment is used to remove
refrigerant from vehicle's A/C system without polluting atmosphere. To
remove and recycle refrigerant, connect the recovery/recycling system
and follow instructions provided with the system.
         The removed refrigerant is filtered, dried and stored in a
tank within the recovery/recycling system until it is ready to be
pumped back into the vehicle's A/C system. With refrigerant stored in
the recovery/recycling system, A/C system can be opened without
polluting atmosphere.

NOTE:    Separate sets of hoses, gauges and refrigerant
         recovery/recycling equipment MUST be used for R-12 and
         R-134a based systems. DO NOT mix R-12 and R-134a
         refrigerants, as their refrigerant oils and desiccants are
         not compatible. On systems with R-134a refrigerant, use
         Polyalkylene Glycol (PAG) wax-free refrigerant oil.

END OF ARTICLE

A/C-HEATER SYSTEM - MANUAL 

         1993 MANUAL A/C-HEATER SYSTEMS
         Volkswagen United States, Inc.

         Corrado SLC

         SPECIFICATIONS

SPECIFICATIONS TABLE

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Application                                       Specification

Compressor Type  ........................  Sanden SD-709 7-Cyl.
Compressor Belt Tension (1)
System Oil Capacity (2)  ........................  3.9-4.4 ozs.
Refrigerant (R-134a) Capacity  ................  35.0-36.6 ozs.
System Operating Pressures
 High Side  ............................  203 psi (13.8 kg/cm

ý

)

 Low Side  ...............................  17 psi (1.1 kg/cm

ý

)

(1) - Ribbed belt uses automatic belt tensioner.
(2) - Use PAG Compressor Oil (Part No. G 052 154 A2).

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WARNING: To avoid injury from accidental air bag deployment, read and
         carefully follow all SERVICE PRECAUTIONS and DISABLING &
         ACTIVATING AIR BAG SYSTEM procedures.

         AIR BAG SYSTEM PRECAUTIONS

         SYSTEM OPERATION CHECK

         Two lights pertaining to air bag system are located directly
above air bag symbol in instrument cluster. Control light is used to
indicate readiness of system. With ignition on, control light comes on
for about 5-8 seconds then goes out, while diagnosis unit in air bag
control unit performs an electronic test cycle of system.
         If control light does not function as described, a fault
probably exists in system. If fault occurs while ignition is on, it
will be stored in fault memory. Warning light will then come on, and
air bag system will be switched off. If warning light comes on or
flickers while driving, air bag system should be tested.

         SERVICE PRECAUTIONS

         Observe these precautions when working with air bag systems:

  *  DO NOT use computer memory saver tool. Using computer memory
     tool will keep air bag system active and may cause accidental
     deployment of air bag unit.

A/C-HEATER SYSTEM - MANUAL 

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F

     (90

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C).

         DISABLING & ACTIVATING AIR BAG SYSTEM

WARNING: System voltage is retained for about 20 MINUTES after system
         is deactivated. Wait about 20 MINUTES after system is
         disabled before servicing, as air bag may accidentally
         deploy, causing personal injury.

         Disabling & Activating System
         To disable system, disconnect negative battery cable. Wait 20
MINUTES before working on vehicle. To activate system, reconnect
negative battery cable. Verify system is functioning properly. See
SYSTEM OPERATION CHECK.

CAUTION:  When battery is disconnected, radio will go into anti-theft
          protection mode. Obtain radio anti-theft protection code
          from owner prior to servicing vehicle.

         DESCRIPTION

         The air conditioning system is a cycling clutch type.
Compressor is cycled on and off by a thermostatic switch to maintain
constant cooling rate. System components include evaporator, expansion
valve, receiver-drier, control panel and condenser. A dual-pressure
switch includes a high-pressure cut-out switch and a low-pressure cut-
out switch.
         Control panel includes 3 rotary knobs over 2 push buttons.
See Fig. 1. Left knob controls the fan and increases fan speed when
turned clockwise. Center knob is the temperature control and increases
heat by turning clockwise. Right knob controls air distribution.
         The 2 push buttons are ON/OFF switches controlling A/C. Left
button controls normal A/C (outside air). Right button gives maximum
A/C using recirculating air. See Fig. 1.

A/C-HEATER SYSTEM - MANUAL 

         OPERATION

         SYSTEM CONTROLS

         Air Distribution
         Air distribution control knob directs airflow. With knob at 7
o'clock position, floor vents are open. With knob at 10 o'clock
position, defrost vents are open. At 2 o'clock position dash vents are
open. At 5 o'clock position, floor and dash vents are open.

         Fan Speed Control
         Fan switch increases fan speed when turned clockwise.

         Temperature Control Knob
         Temperature control knob increases heat by turning clockwise
and increases cooling by turning counterclockwise.

         DUAL-PRESSURE SWITCH

         High-Pressure Cut-Out Switch
         This switch shuts compressor off if high pressure reaches
about 464 psi (32.6 kg/cm

ý

). High-pressure cut-out switch will reset

when pressure decreases to about 348 psi (24.5 kg/cm

ý

).

         Low-Pressure Cut-Out Switch
         This switch shuts compressor off when pressure in system is

 

 

 

 

 

 

 

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