SUNWARD SWDM40 - Common Failures and Solutions

SWDM40 OPERATION & MAINTENANCE MANUAL
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3.5.2 Common Failures and Solutions
1. Failure of Controlling Circuit and
Component
Failure
Cause
Solution
Condensor
fan
Fan not work
Bad contact of connector；bad contact of
ground wire
Check and
repair
No pull-in of relay; Temperature controller
not work
Change
Damage of temperature controller package
Change
Fan work but can’t
stop
Wrong wiring of temperature controller
Repair
Relay can’t be turn off
Change
Stuck of condenser
fan
Burnout ; stuck of fan fin
Change
Evaporator
fan
Burnout of
evaporator fan
Rubedo of speed regulating resistor
Change
Small air volume of
evaporator fan
Impeller looseness; impurity clogging
Check and
repair
Evaporator fan
doesn’t turn
Invalid third gear switch; bad contact of
ground wire
Repair
Compressor
Low rotation speed
of compressor
Looseness of belt; belt abrasion
Repair or
change
Compressor doesn’t
run normally
Uneven gap of clutch
Adjust
Pressure switch work unstable
Change
Compressor doesn’t
turn
Burnout of clutch solenoid coil
Change
Pressure switch not work(open circuit)
Change
Too large gap of clutch
Repair or
change