CABIN
L3540-II, L4240-II, L5040-II, L5240-II, L5740-II , WSM
10-S1
1. TROUBLESHOOTING
COMPRESSOR
AIR CONDITIONING SYSTEM
Symptom
Probable Cause and
Checking Procedure
Solution
Reference
Page
Noisy
(Compressor ON)
1. Belt slipping Adjust or replace G-35
2. Compressor bracket
mounting screws loosen
Tighten –
3. Bearing of compressor
worn or damaged
Replace 10-S41
4. Piping resonant Tighten or add clamp –
5. Valves in compressor
damaged
Replace 10-S41
Noisy
(Compressor OFF)
1. Bearings of magnetic
clutch, idle pulley or crank
pulley worn or damaged
Replace 10-S41
2. Blower damaged Repair or replace –
Symptom
Probable Cause and
Checking Procedure
Solution
Reference
Page
Does Not Cool
(No Air Flow)
1. Fuse blown Replace 9-S35
2. Wiring harness
disconnected or
improperly connected
Repair –
3. A/C blower switch
damaged
Replace 10-S23
4. A/C compressor relay
damaged
Replace 10-S27
5. A/C blower motor
damaged
Replace 10-S26
Does Not Cool
(Compressor Does
Not Rotate)
1. Belt slipping Adjust or replace G-35
2. Fuse blown Replace 9-S35
3. A/C switch damaged Replace 10-S23
4. Magnetic clutch damaged Repair or replace 10-S22
5. Pressure switch damaged Replace 10-S28
Does Not Cool
(Others)
1. Insufficient refrigerant Check with manifold gauge 10-S21
2. Compressor damaged Replace 10-S41
3. Expansion valve damaged Replace –
Insufficient Cooling
(Insufficient Air Flow)
1. Air filter clogged Clean or replace G-35
2. A/C blower motor
damaged
Replace 10-S26
3. A/C blower resistor
damaged
Replace 10-S25
4. Evaporator frosted Clean or replace thermo switch –
Insufficient Cooling
(Many Bubbles in
Sight Glass)
1. Insufficient refrigerant Check with manifold gauge 10-S21
2. Air mixed in Check with manifold gauge 10-S21
3. Gas leaking from some
place in refrigerating cycle
Repair and charge refrigerant 10-S19
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