Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 1134 / 1164

HEATER, AIR CONDITIONER AND VENTILATION
-
On-vehicle Service
55-8
ON-VEHICLE SERVICE
55200840225
SIGHT GLASS REFRIGERANT LEVEL TEST
The sight glass is a refrigerant level indicator. To check the
refrigerant level, clean the sight glass and start the vehicle
engine. Push the A/C button to operate the compressor, place
the blower switch to high and move the temperature control
lever to max cool. After operating for a few minutes in this
manner, check the sight glass.
1. If the sight glass is clear, the magnetic clutch is engaged,
the compressor discharge line is warm and the compressor
inlet line is cool; the system has a full charge.
2. If the sight glass is clear, the magnetic clutch is engaged
and there is no significant temperature difference between
compressor inlet and discharge lines; the system has
lost some refrigerant.
3. If the sight glass shows foam or bubbles, the system
could be low on charge. The system has to be recharged
with refrigerant.
MAGNETIC CLUTCH TEST
55200850303
1. Disconnect the connector (1-pin) to the magnetic clutch.
2. Connect battery (+) voltage directly to the connector for
the magnetic clutch.
3. If the magnetic clutch is normal, there will be “click”. If
the pulley and armature do not make contact (‘click’),
there is a malfunction.
RECEIVER DRIER TEST
55200860115
Operate the unit and check the piping temperature by touching
the receiver drier outlet and inlet.
If there is a difference in the temperatures, the receiver drier
is restricted.
Replace the receiver drier.
COMPRESSOR DRIVE BELT ADJUSTMENT
55200100101
Refer to GROUP 11 - On-vehicle Service.
Sight glass