Not working of remote
controller switch ON/OFF
Short circuit the protecting parts in the
Indoor controller board.
Trouble of the Indoor controller board. Check the Indoor controller board out.
Wiring between the indoor and the wired
remote controller is coming off.
Check the wiring between the Indoor and the wired
remote controller.
Trouble of the remote controller.
Check the varistor (ZNR1) and fuse (FUSE) out in
the Indoor controller board.
Exchange the remote controller.
Wiring between the indoor and outdoor is
coming off.
Working the Indoor units
and not working the outdoor
units.
Check the wiring out between the indoor and
outdoor.
Difference of wiring polarity between the
indoor and outdoor.
Trouble of the outdoor inverter P.C. board.
Trouble of the contactor (52C). Exchange the contactor.
Check the outdoor inverter P.C. board.
Malfunction of outdoor unit. Refer to the TECHNICAL & SERVICE MANUAL of
outdoor unit.
Fan motor connector is coming off.
Not rotating the fan in the
indoor unit.
Trouble of the Indoor controller board.
Check the fan motor output of the Indoor
controller
board.
Check the connector out.
Trouble of the fan motor. Check the resistance value between the each tap
of fan motor.
A connector attaching the panel to the body
is not connected.
Horizontal vane doesn't work.
Check if the connector for vane motor is connected.
Connect it.
A connector attaching the panel to the body
is not connected.
Fixing of horizontal vane.
Connect it.
Phenomenon Cause Countermeasure
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