Cause
Check Item
Action
(Turn OFF Main Switch)
Phenomenon
Measure coil
resistance by tester.
Replace indoor unit
fan motor.
Failure of
Indoor Unit
Fan Motor
Disconnected
Coil
"RUN" light is
ON and LCD
is indicated.
However, the
system does
not operated.
(ex.
The indoor,
outdoor fans
or compressor
does not
operate.)
The Comp.
does not Stop
or Start even
if the Setting
temperature
on LCD is
Changed *3)
Measure insulation
resistance.
Burnt-Out
Coil
Measure coil
resistance by tester.
Replace outdoor unit
fan motor.
Failure of
Outdoor Unit
Fan Motor
Disconnected
Coil
Measure insulation
resistance.
Burnt-Out
Coil
Check connections.
Failure of
One of PCBs
Disconnected
Wiring to
PCB
Check PCB by
self-checking *1).
Correctly connect
wiring.
Replace PCB
if failed.
Check it by
self-checking *1).
Check it by
Check Mode *2).
Failure of
PCB
Replace or correctly
connect wires if
abnormality exists.
Failure of
Air Inlet
Thermistor
Failure of
Thermistor
Disconnection
of Thermistor
Check magnetic
switch activates
correctly or not.
Replace magnetic
switch.
Replace PCB if
failed.
Failure of
Magnetic
Switch for
Comp.
Insufficient
Contacting
Measure resistance
between two wires.
Replace compressor.
Failure of Comp. Motor
Check for abnormal
sound from comp.
Failure of Comp.
Abnormality of Remote
Control Switch Cord
Check it by Test Run.
Failure of Indoor Unit PCB
for
outdoor unit,
indoor unit,
remote
control switch
●
Abnormalities of Devices
In the case that no abnormality (Alarm Code) is indicated on the remote control switch, and normal
operation is not available, take necessary action according to the procedures mentioned below.
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