MANUALS · HEATER, AIR CONDITIONER AND VENTILATION [55] · страница 72 из 118 · Открыть оригинал PDF ↗
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Service
SERVICE ADJUSTMENT PROCEDURES TEST PROCEDURESESSFABC
SIGHT GLASS REFRIGERANT LEVEL TEST
The sightglassisrefrigerant level indicator. To check the
refrigerant level,cleanthe sight glass and start the vehicle
engine. Push the air conditioner button to operate the com-
pressor,placetheblowerswitchtohighandmovethe
temperature control lever to max cool. After operating for
few minutes in this manner, check the sight glass
(1) Ifthesightglassisclear,themagneticclutchis
engaged,the compressor discharge line is warm and the
compressorinletlineiscool;thesystemhasfull
charge;
(2) If the sight glass is clear, the magnetic clutch is engaged and
there is no significant temperature difference between com-
pressor inlet and discharge lines; the system has lost most of
it refrigerant charge
(3) If the sight glass shows foam or bubblesthe system could
be low on charge The system has to be tested, leak checked
then recharged with refrigerant
MAGNETIC CLUTCH
(1) Disconnect the wiring from the magnetic clutch.
(2) Connect battery (~) to compressor body:
3) Connect battery (+) voltage directly to wiring for the magnetic
clutch_
4) If the magnetic clutch is normal; there will be a "click" . If the
pulley and armature do not make contact ("click") there is a
malfunction.
RECEIVER DRIER
To Test the Receiver Drier
(1) Operatetheunit and check the piping 'temperature by
touching the receiver drier outlet ad inlet:
(2) If there isdifference inthetemperatures, the receiver
drier is restricted.
Replace the receiver drier.
DUAL PRESSURE SWITCH
Measure the pressure at the high pressure sideWhen the
dual pressureswitch 'isONas in the figure at left,and if
thereis continuitybetweenthedualpressure switchter-
minals, then the condition is normal; if there is no continuity,
replace the switch:
Mitsubishi Motors CorporationJuly 1993
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