Subaru SVX 1992 Manual page 1038

4-7 IT902) AUTOMATIC AIR CONDITIONING SYSTEM
2) Compressor operation inspection
No . Point to check Switch operation Judgement standard Remarks
DEF switch "ON" Compressor ON Compressor turns OFF several
1 Compressor ECON switch "ON"
i
Compressor OFF seconds after ECON switch is
DEF switch "ON" Compressor ON turned ON .
3) Illumination control inspection
No. Point to check Switch operation Judgement standard Remarks
11D Illumination lamp illuminates
and both switch lamp and
"set" temperature display dim .
Green lamps remain on al-
1 Illumination switch Lighting switch "ON"
Switch lamps :
OFF -" Green lamp illumi-
though OFF and OUT-TEMP
nates .
switches are ON .
ON -+ Amber lamp illumi-
nates .
2. INSPECTION USING SIGHT GLASS
When high-pressure line is greater than 588 kPa (6 kg/cm', 85 psi) observe sight glass to check refrigerant
amount .
Correct amount of refrigerant cannot be judged if the line pressure is less than 588 kPa (6 kg/cm', 85 psi) since
air bubbles flow through system .
Item to check Adequate Insufficient
Almost in refrigerant
Too much refrigerant
CLEAR FOAMY Or BUBBLY FROSTY
NO FOAM
Air bubbles sometimes
Air bubbles always ap- Frost-like appears. NO air bubbles appear .
appear when engine
pear .
speed is increased or de-
creased
State in sight glass
°
°
, °
u ,
°
°
" ,~
°
High-pressure side is hot
High-pressure side is There is almost no tem- High-pressure side is hot
while low-pressure side is warm and low-pressure perature difference be- and low-pressure side is
Temperature of high and
cold . (A big temperature side is slightly cold . (Not tween high and low- pres- slightly warm . (Slight tem-
low pressure lines difference between high so big temperature differ- sure side. perature difference be-
and low-pressure side.) ence between high and tween and low pressure
low-pressure side.) side.)
Both pressures on high Both pressures on high High-pressure side is ab- Both pressures on high
Pressure of system and low-pressure sides and low-pressure sides normally low . and low-pressure sides
are normal . are slightly low .
are abnormally high .
Fig. 209
3. INSPECTION USING MANIFOLD GAUGE
Standard pressure:
High-pressure side
Approx . 1,275 - 1,471 kPa (13 - 15 kg/cm2, 185
- 213 psi)
Low-pressure side
Approx. 196 kPa (2 kg/cm', 28 psi)
B4-712
Connect manifold gauge and read pressure gauge indi-
cation.
Vehicle conditions :
Windows . . .. . . . . .. . .. ... . .. . ... ... . . . ... . ... ... . . . . .. .... . .. ... . . . . ... Open
Engine speed . .. . . . . . .. .. . . . . . .. . . .. . .. . . .. . 1,500 - 1,700 rpm
Blower fan speed . . . . . . . . . . . . . . ... . .. . .. . . . . . .. . .. . . .. .. . . .. . .. .... .. . . HI
Inlet . . ... . .. . .. ... . . . ... . .. . . ..... . . . . ... . .. . .. . . . . ... . .. . ... .. . . .. . .. .. FRESH
"Set" temperature display . . .. . .. . . .. . .. ... . . .. ... 18°C (65°F)
104