Refrigerant, draining
| WARNING | Follow the safety instructions for work on the air conditioning system. see Refrigerant |
Note. First read the instructions covering slow and fast leaks. See AC-system, oil, refilling
Note. Always plug the pipes and connections when working on the climate control system.
Note. The recycling unit must have an oil separator. The oil separator must be of a type that allows the amount of run out oil to be measured.
Note. The ambient temperature must be above 20°C when draining the system.
Note. Always disconnect the battery ground cable when working with the climate control system. See Battery disconnecting and connecting
Note. Always use new O-rings lubricated with compressor oil.
When draining refrigerant, the recycling unit can be attached to the service valve for both the high pressure side (HP) (1) and the low pressure side (LP) (2) at the same time. This is the quickest method.
Scheme 390
Check the amount of oil (if any) that has run out when draining the refrigerant.
AC-system, oil, refilling
Operation Number(s): 87003-2
| WARNING | Never mix different types of oils. Always use the correct type of compressor oil. |
| CAUTION | When installing a completely new air conditioning system: Check that there is oil in the compressor. The other components should contain no oil. |
Note. Too much lubricating oil will impair refrigeration. Too little lubricating oil will damage the compressor.
Draining/refilling oil
When draining oil from the compressor, inspect for the following
- the oil changes color to red
- the oil contains metal residues
- the clarity/translucency of the oil
Draining the oil on the air conditioning compressor without drain plug occurs via the pressure and intake side openings after the pulley and the clutch plate have been rotated 4-5 turns and with the openings facing downwards.
Filling oil in air conditioning compressors without drain plugs occurs via the pressure side's opening.