Subaru SVX 1992 Manual page 1041

AUTOMATIC AIR CONDITIONING SYSTEM [T1ooo] 4-7
Gauge indication Refrigerant cycle Probable cause Corrective action
Low-pressure side sometimes becomes * Air conditioning system Refrigerant does not dis- a Drain water from refrigerant
negative . does not function and does charge cyclically . cycle or replace refrigerant.
not cyclically cool the com- 1 e Replace receiver drier.
partment air . Moisture is frozen at expan-
The system constantly func-
lion for a certain period of
sion valve outlet and inlet .
time after compressor is Water is mixed in refrigeration
stopped and restarted . cycle .
LO
HI
84-718
Fig. 215
Low-pressure side becomes negative . Receiver drier or front/rear High-pressure side is closed After the system is left at rest,
side of expansion valve's pipe and refrigerant does not flow . start again in order to confirm
is frosted or dewed . y whether or not problem is
Expansion valve or receiver
drier is frosted .
caused by water or foreign
particles .
" If the problem is due to wa-
ter, drain water from refrig-
eration cycle or replace re-
l0 H I
frigerant.
e If it is due to foreign parti-
cles, remove expansion
valve and remove it with
dry and compressed air .
" If either oil the above
method cannot correct the
problem, replace expansion
valve .
Replace receiver drier .
Check compressor oil for
Fig. 216
719
contamination .
107