Removing and installing electrical air conditioner compressor V470, engine codes CNLA and CRJA (hybrid) — VW

Removing and installing
electrical air conditioner compressor
V470
, engine codes CNLA and CRJA (hybrid)
Note
If the
air conditioner compressor control unit
J842
is defective, the amount of refrigerant in the new air conditioner compressor should be adjusted. The refrigerant circuit must not be flushed with R134a.
The procedure required to clear the air conditioner compressor of refrigerant oil is described in the workshop manual 'Air conditioning systems with refrigerant R134a'
Rep. gr.
00
under 'Flushing (cleaning) refrigerant circuit with refrigerant R134a'; 'Standard circuit diagrams for various flushing circuits'; 'Flushing circuit and air conditioner'.
If the refrigerant circuit is flushed with refrigerant R134a, e.g. following air conditioner compressor damage, the vehicle must be de-energised beforehand
Electric drive
Rep. gr.
93
De-energising high voltage system
.
WARNING
High voltage on high-voltage system of hybrid vehicle. Danger of electric shock! Following procedure also requires work on high-voltage system. Now de-energise the high-voltage system
Electric drive
Rep. gr.
93
De-energising the high-voltage system
.
WARNING
High voltage on high-voltage system of hybrid vehicle. Danger of electric shock! Before starting work, carry out a visual check of high-voltage components in area of work. Comply with general warnings
Hybrid electrical system
Rep. gr.
93
General warnings for working on the high-voltage onboard power supply system
.
Note
The bolting points of the air conditioner compressor and the engine must be checked prior to installation.
The contact surfaces must be clean, rust- and grease-free.
Otherwise, repair the contact surfaces using the
contact surface cleaning set
VAS 6410
Electrical system; General information
Rep. gr.
97
Contact surface cleaning set VAS 6410
.
Special tools and workshop equipment required
Air conditioner service station
VAS 6007A
(or later model).
Torque wrench
V.A.G 1331
Removing
Note
The refrigerant must be extracted beforehand, e.g. with
air conditioner service station
VAS 6007A
(or later model).
In vehicles with start-stop system, note abort conditions
Chapter
.
Remove bolts
2
(25 ± 3 Nm) from air conditioner compressor
1
.
WARNING
High voltage on high-voltage system of hybrid vehicle. Danger of electric shock! Before starting work, carry out a visual check of high-voltage components in area of work. Comply with general warnings
Hybrid electrical system
Rep. gr.
93
General warnings for working on the high-voltage onboard power supply system
.
Remove power and control electronics for electric drive
Electric drive
Rep. gr.
93
.
Pull high-voltage wire
2
from air conditioner compressor
1
.
Note
Do not turn connector. Danger of destruction.
Pull connector
2
off air conditioner compressor
1
.
WARNING
Danger from escaping pressurised refrigerant!
Freezing of skin and other body parts.
Extract refrigerant and then immediately open refrigerant circuit.
If the refrigerant was extracted more than 10 minutes before the opening of refrigerant circuit, the refrigerant must be extracted again. The pressure in the circuit will increase due to subsequent evaporation.
Unscrew bolt of high-pressure line (20 ± 3.0 Nm), remove high-pressure line from air conditioner compressor and seal with suitable bungs.
Remove bolt of low-pressure line (20 ± 3.0 Nm) and remove low-pressure line from air conditioner compressor.
Take
electric air conditioner compressor
V470
out downwards.
Installing
Note
The bolting points of the air conditioner compressor and the engine must be checked prior to installation.
The contact surfaces must be clean, rust- and grease-free.
Otherwise, repair the contact surfaces using the
contact surface cleaning set
VAS 6410
Electrical system; General information
Rep. gr.
97
Contact surface cleaning set VAS 6410
.
Note
If the
air conditioner compressor control unit
J842
is defective, the amount of refrigerant in the new air conditioner compressor should be adjusted. The refrigerant circuit must not be flushed with R134a.
The procedure required to clear the air conditioner compressor of refrigerant oil is described in the workshop manual 'Air conditioning systems with refrigerant R134a'
Rep. gr.
00
under 'Flushing (cleaning) refrigerant circuit with refrigerant R134a'; 'Standard circuit diagrams for various flushing circuits'; 'Flushing circuit and air conditioner'.