WAKL5N0802A
Edition: 07.02.2022
Page: 12/18
3.9. Oil level check of the compressor at the oil sight glass
Observe inspection glass at compressor for ca. 10-15 min while the
compressor is ON. Refrigerant oil must be visible. In the case of under-
or over-filling there is a risk of serious damage to the compressor.
The oil should be clear and clean.
Danger! Risk of injury!
Be particularly careful when working close to hot, rotating or energized parts.
Refrigerant oil is circulating together with the refrigerant in the entire cooling system. For this
reason, the oil level may be different for every reading
3.10. Compressor oil exchange
Whenever the refrigerant circulation system has been opened, the filter dryer must be re-
newed (see point 3.5).
Switch on ignition. Switch on the air conditioner into operation for approx. 10 min.
First check refrigerant oil level at the
sight glass.
Connect the blue manometer (to atmospheric
pressure) to service connection (5) of the ser-
vice shut-off valve ND
– low pressure - (6) of
the refrigerant compressor and the red ma-
nometer (to atmospheric pressure) to service
connection (1) of the service shut-off valve HD
– high pressure – (2). Set service shut-off
valve ND (6) and HD (2) in “Service Position
Compressor” (turn clockwise until stop) and
then evacuate
Oil sight glass
1
5
2
6
