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SYMPTOM
Weak from
pressure or Don't
work
2. Motor
Unable to control
the fan
(2) How to check the air conditioning system with the needle of high low gauge
To connect with manifold pressure gauge can find the cause of air conditioning system.
Because manifold pressure gauge is various sensibly (Ambient Temp. is based on 30~35 °C)
Caution: Operating E/G RPM 1500~2000 is must, and so to that you can check the correct cause and air
conditioning. (In case below the figure of indicated pressure gauge has some clearance, confirm with
approximate indicated needle data.)
Gauge pressure conversion
2
lb/in
=PSI
2
1 kg/cm
=14,223 lb/in
(Ex) 200 PSI=14 kgf/cm
CABIN
CONDITION
Motor is normal
Motor is abnormal
Air leakage
Motor
Motor is abnormal
2
2
CAUSE
Air inlet clogged
Evaporator freezing
Ventilator switch
damage
Compressor
Motor failure
Wire cut
Duct leakage
Air volume control switch
failure
Motor failure
111
REMEDY
Remove
Controlling minimum
pressure
Replace the switch
Replace
Replace
Replace
Check, tighten
Check, tighten
Replace
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