Subaru SVX 1992 Manual page 1040

4-7 IT1000I AUTOMATIC AIR CONDITIONING SYSTEM
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too low and low- High- and low-pressure sides Compressor pressure opera- Replace compressor .
pressure side is too high . become equal soon after tion is improper .
compressor operation stops. l
Damaged inside packings for
1
compressor
LO
HI
No temperature difference
between high and low- pres-
Compressor discharge capac-
ity does not change. (Com-
Replace compressor .
sure sides pressor stroke is set at maxi-
mum .)
84-715
Fig. 212
Both high- and low-pressure sides are too 0 There is a big temperature Receiver drier inside is a Replace receiver drier
low . difference between receiver clogged a little . o Check compressor oil for
drier outlet and inlet. Outlet contamination .
temperature is extremely
'-' low .
" Receiver drier inlet and ex-
pansion valve are frosted .
" Temperature of expansion High-pressure pipe located 0 Check and repair malfunc-
valve inlet is extremely low between receiver drier and tioning parts.
LO HI
as compared with areas
near receiver drier .
expansion valve is clogged . o Check compressor oil for
contamination .
Expansion valve inlet may
be frosted .
" Temperature difference oc-
84-716
Fig. 213
curs somewhere in high-
pressure side .
Both high and low-pressure sides are too There is a big temperature Expansion valve becomes 0 Remove foreign particles by
low . difference between expansion closed a little compared with using compressed air .
valve inlet and outlet while the specification. o Check compressor oil for
the valve itself is frosted. l contamination .
1) Improper expansion valve
adjustment
2) Malfunctioning thermal
valve
3) Outlet and inlet may be
clogged
LO HI
Area near low-pressure pipe Low-pressure hose is clogged o Check and repair malfunc-
connection and service valve or crushed . tioning parts .
are extremely cold as com- a Check compressor oil for
pared with area near expan- contamination .
sion valve outlet and evapora-
tor.
Air flow volume is not Evaporator is frozen Replace compressor .
enough or low. j
Compressor discharge capac-
ity does not change . (Com-
134-716
pressor stroke is set at maxi-
Fig. 214
mum length .)
106