CHUNLAN -B, Service Manual

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Troubleshooting
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(2) Display of remote controller or wire controller indicates air delivery position, but fans are
not operating.
Phenomena Possible causes Correction method
Indoor fan burnt or broken wire Repair or replace fan
Damaged fan capacitor Replace capacitor
Bad contact in main ctrl board
relay or coil broken wire Replace main control board relay
Display of remote
controller or wire
controller indicates air
delivery position, but
fans are not operating
Fan card contact open Repair bad contact
Note: During heating, defrosting or prevention of cold air, remote controller indicating air
speed but fans not operating is normal and not failure.
(3) Troubleshooting for failure of outdoor fan or compressor operation at “Cooling” or
“Heating”:
Phenomena Possible causes Correction method
Neither outdoor fan nor
compressor operating at “Cooling”
or “Heating” OD control board relay coil
broken wire or bad contact Replace relay
OD fan motor failure or
damaged fan capacitor Replace motor or
capacitor Compressor operating but outdoor
fan not operating at “Cooling” or
“Heating”
OD control board relay failed Replace relay
Compressor failure Replace compressor
OD control board relay failure Replace relay
AC contact unreliable/damaged Replace AC contactor
Outdoor fan operating but
compressor not operating
Compressor operating
capacitor damaged Replace this capacitor
(4) Compressor shutdown shortly after startup
Phenomena Possible causes Correction method
Compressor
shutdown
shortly
after startup During cooling, sunshine or blocked ventilation can cause
higher condensation pressure; and when this is serious,
compressor overload protection will act to stop
compressor.
Remove
obstruction and use
rain shelter