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11
Trouble-Shooting
Power cutoff
Fuse burn-out
Power plug is not firmly seated or
connection is poor
Line connection failure between indoor unit
and outdoor unit
Controller fuse burned out
Controller burned out
The switch is in
the air supply
mode but the
fan motor does
not run
Both outdoor fan and
compressor do not run
The operation is under
Cooling or
Heating
mode; the compressor
runs but the outdoor fan
does not run
The operation is under
Cooling or
Heating
mode; the outdoor unit
runs but the compressor
does not run
Poor cooling effect
in cooling operation
Short-circuit between lines
Indoor fan or motor burned out
or lines are disconnected
Remote controller failure
Relay failure
Failure of outdoor fan motor
Failure of outdoor relay
Poor contact at defrosting temp.
sensor or at tube sensor
Compressor failure
Operating capacitor of compressor
burned out
Cooling load is too heavy
Set temperature is too high
Coil line break
Poor contact
54
Restore power supply
Resolve the problem of short-circuit,
replace fuse
Resolve the problem of poor contact
Plug is securely seated in the socket
Check the line connection according
To the electrical diagram and ensure
correct connection
Replace controller fuse
Replace controller
Repair or replace fan or motor
Remove failure or replace damaged
parts
Replace relay
Replace relay
Replace relay
Replace defrosting temp. sensor or
tube sensor
Replace Compressor
Replace capacitor
Check the forecasted cooling load
Decrease set temperature
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