30
Check of indoor fan motor
A
Check of remote controller and receiver P.C. board
B
Indoor fan does not operate.
Turn OFF the power supply.
Check connector (Fan motor) visually.
Repair the indoor fan motor.
Disconnect lead wires from connector (Fan motor) on indoor electronic control P.C. board.
Measure resistance between lead wires No.1 and No.4 and then No.3 and No.4 of the fan motor.
Are lead wires connected?
Reconnect the lead wires.
Is soldered point normal?
Replace the indoor electronic control
P.C. board.
Resolder it.
Is resistance 0 (short circuit) or
∞
(open circuit)?
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote
controller.
Yes ( 0 or
∞
)
No
(others)
Yes
No
Yes
No
●
Re-install the unit away from lights.
●
Attach a filter on receiving part.
Switch on the remote controller.
Is LCD display on the remote
controller visible?
Replace the batteries.(see page 26.)
Remove the batteries and then set them back.
Check if the unit operates with the remote controller.
Does the unit operate with remote controller?
Turn on a radio to AM and press
switch on remote controller.
Is noise heard from radio?
Replace the remote controller.
Are there any fluorescent lights
of inverter or rapid-start type
within the range of 1m?
Turn ON the power supply.
Measure the voltage between receiver P.C. board connector No.2(+) and No.1 when the remote controller button is pressed.
Is the voltage approx. 4V DC?
No
(5V DC or 0V DC)
Replace the receiver P.C. board.
No
(not clear)
Yes
Yes
No
OK
No
Yes
Yes
Yes
No
Replace the indoor electronic control P.C. board.
Replace the auto restart P.C. board.
Yes
Disconnect AUTO RESTART P.C. board from CN104
and short CN104
1
to
5
.
Does the unit receive the signal
from the remote controller?
No
W
Check if the remote controller is exclusive for this air conditioner.
