Diagnosing Malfunctions
1. Tracing Faults
PROBLEM CONDITION CAUSE CORRECTIVE
MEASSURE
1.
Compressor
Abnormal sound Inlet sound
Outlet sound
Insufficient
lubrication
Replenish
Insufficient belt
tension
Adjust
Released holder Tighten connections
Clutch failure Check
Abnormal revolutions Drive interruption Damaged parts Check, replace
Clutch slipping Check, replace
Lack of lubricant Replenish
Belt tension
released
Adjust
Refrigerant or oil
leakage
Refrigerant or oil
leakage
Damaged sealing Replace
Head screw is
loosened
Tighten the screws
D-ring damaged Replace
Abnormal pressure Too low / high
pressure
Insufficient cooling Adjust
Compressor Replace
2. Engine Low pressure or not
working
Normal engine
operation
Air inlet is blocked Remove
Evaporator freezing Minimum pressure
control
Fan switch
damaged
Replace the switch
Compressor Replace
Abnormal motor
operation
Engine failure Replace
Broken wire Replace
Air leak Tube leak Check, tighten
Fan cannot be
operated
Engine Switch failure Check, tighten
Abnormal motor
operation
Engine failure Replace
PROBLEM CONDITION CAUSE CORRECTIVE MEASSURE
3.
Clutch
Noise Regular / irregular
noise
Interference with
ulle
Check the position of the
compressor
Disengaged Engaged sometimes Wire defect Check the wire
Engaged by pushing by
hand
Large clutch gap Adjust
Low voltage Check the battery
Without a faulty
conductor
Defect Replace
Slipping Slipping during rotation Low voltage Check the battery
Greasy bar on clutch Clean
Defect Replace