Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1995 1995 Service Manual MECHANICAL COMPONENTS SECTION AIR CONDITIONING SYSTEM MSA5TCD95L5748

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4-7 DIAGNOSTICS
9. Sight Glass Inspection

9. Sight Glass Inspection
1. INSPECTION CONDITION
1) Operate the engine at approximately 1,500 rpm.
2) Open the door windows.
3) Set the fan switch to the 4th (High) position.
4) Set the mode selector switch to "A/C" position.
5) Set the temperature control switch to Full cold position.
6) Ensure that compressor discharge pressure is at least
588 kPa (6 kg/cm2, 85 psi).
NOTE:
When discharge pressure does not reach 588 kPa (6
kg/cm2, 85 psi) in areas where outside air temperature is
low, proceed as follows:
a. Set the TEMP. SWITCH to the Full hot position.
b. Set the temperature control switch to "MAX. A/C" posi-
tion.
c. Close the door windows completely.
d. Increase the compartment temperature so that dis-
charge pressure reaches at least 588 kPa (6 kg/cm2, 85
psi).
2. REFRIGERANT CHARGE AMOUNT CHECKING
Check the refrigerant charge amount using the following
table as a guide.
Item to check Adequate Insufficient Almost in refrigerant Too much refrigerant
CLEAR FOAMY or BUBBLY FROSTY NO FOAM
Air bubbles sometimes Air bubbles always Frost-like appears. No air bubbles appear.
appear when engine appear.
speed is increased or
decreased.
State in sight glass

G4M0669 G4M0670 G4M0671 G4M0672

High-pressure side is High-pressure side is There is almost no High-pressure side is
hot while low-pressure warm and low-pressure temperature difference hot and low-pressure
Temperature of high side is cold. (A big side is slightly cold. between high and low side is slightly warm.
and low pressure lines temperature difference (Not so big temperature pressure side. (Slight temperature
between high and low difference between high difference between high
pressure side) and low pressure side) and low pressure side)
Both pressures on high Both pressures on high High-pressure side is Both pressures on high
Pressure of system and low pressure sides and low pressure sides abnormally low. and low pressure sides
are normal. are slightly low. are abnormally high.

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