Cooper S Clubman (R55) L4-1.6L Turbo (N14) (2008)
Condenser HVAC: All Technical Service Bulletins
A/C - Poor Or No Cooling
SI M64 01 08
Heating and Air Conditioning
August 2008
Technical Service
SUBJECT
Air Conditioning System Leak Testing
MODEL
R55 (Cooper Clubman, Cooper S Clubman)
SITUATION
The customer complains of poor or no air conditioning cooling. After further diagnosis, the system is found to be low or empty of a refrigerant charge,
but when using an electronic leak detector, no leak can
be found.
CAUSE
In most cases, an electronic leak detector is not sufficient for identifying small leaks in the system.
Electronic leak detectors can give false alarms and can lead to an improper diagnosis of small leaks. A leak cannot be located exactly if accessibility is
impaired (in the case of the expansion valve, evaporator
or condenser).
PROCEDURE
Always use proper eye and hand protection whenever servicing air conditioning systems. Refer to repair manual RA 64 50 ... for further information.
1.
Always troubleshoot and correct any faults in the IHKA/IHKR (Independent Heating and Air Conditioning) system before proceeding further.
2.
If the source of the leak is difficult to detect, the evaporator and condenser area needs to be checked further for leaks.
3.
A special testing adapter set (64 5 120) has been developed, which allows pressure testing of the air conditioning evaporator and condenser while
still installed in the vehicle.
This prevents a lot of unnecessary disassembly of the vehicle for diagnosis purposes.
4.
In order to use this adapter set, the following auxiliary materials will be needed:
5.
Nitrogen (in pressurized cylinder) obtained locally. Ensure that employees are advised of how to handle pressurized cylinders correctly (danger of
asphyxiation). For this purpose, follow the notes
and instructions in the technical safety specifications available from the gas supplier.
6.
Nitrogen tank set with pressure reducer (available via the dealer equipment program).
5.
If the evaporator or condenser is suspected of leaking, recover the remaining refrigerant from the system, using a BMW approved refrigerant
