Porsche 928 - WORKSHOP MANUAL 1977 Workshop Manual page 327

928 Air Conditioner
87
l
Cleaning the refrigerant
Note
If the syphonecl-off refrigerant is heavily con-
taminated, it must be pumped through the fll-
ter systems several times.
The cleaning condition can be seen at the
moisture indicator (14).
1. Open the filling cylinder shut-off valve (22).
2. Switch on the service unit. The green pilot
lame liahts LID.
a .-.
3. After cleaning the refrigerant (condition
shown by the moisture indicator), close the
shut-off valve).
The unk switches off automatically when all re-
frigerant has been pumped into the filling cyi-
lnder (red pilot lamp lights up). The pressure
in the filling cylinder increases.
Installation work on the air-conditioning system
Printed in Germany - XXV, 1990
87 - 4l