Service manual

12
Yes No
No
Yes
No
Yes
No
The switch of remote controller does not work.
Connection is defective.
Indoor controller board is defective.
Is the connecting
wire between the
indoor unit and
the decoration
panel connected
Is the varistor on
the indoor controller
board burnt?
Yes
Replace the varistor.
No
Is the fuse on the
indoor controller
board melted?
Yes
Yes
Replace the fuse.
Check the followings.
•The display on the remote controller does
not appear on the screen.
•The display on the remote controller is dim.
•The indoor unit does not respond to the
remote control signal when the remote
controller is not operated near the signal
receiving section on the unit.
Replace the batteries.
No
Replace the
remote controller.
Does the display appear on the
screen?
Does the indoor unit receive the
remote control signal when the
remote controller is not operated
near the signal receiving section
on the unit?
Indoor fan motor does not rotate.
Measure the resistance of connectors FAN1
and 2 on the indoor controller board.
Connection is defective.
Turn off the power supply and check the connectors
FAN1 and 2 on the indoor controller board visually.
Indoor fan motor is defective.
Are the connectors FAN1 and 2
connected?
Indoor controller board is defective.
Is the resistance 0 (short circuit) or
∞ (open circuit)?
From the preceding page.
OC302-1.qxp 04.3.17 11:49 AM Page 12