Operation CHARM: Car repair manuals for everyone.

Emptying/Vacuum Pumping/Filling With Refrigerant






Emptying/vacuum pumping/filling with refrigerant

Draining refrigerant

Note! To empty the system the ambient temperature should be above 20°C. Running the engine a short time (five minutes) before starting work will speed up the draining process.




- Drain at the service valve.
- The A/C system will empty in approximately 25 minutes.
- Check the amount of oil (if any) that has run out when draining the refrigerant.

Note! When fault-tracing: There are no high/low pressure connections on the compressor. Thus is it only possible to check the operation of the low pressure switch (Pressostat). Connecting to the service valve.

Vacuum pumping

Caution! Check and top up with fresh compressor oil as required according to before vacuum-pumping the climate control unit on the car.

Vacuum pump system for at least 50 minutes.

Amount of refrigerant in the air conditioning (A/C) system
For the amount of refrigerant the air conditioning (A/C) system can contain, refer to the specification label on the right side spring strut turret in engine compartment.
Fill the system via the service valve.

Note! Carry out a final leak test using a lead detector on the connections where new components have been installed.