15
Measure the voltage between receiver P.C.board connector CN101 No.2 and No.1
when remote controller button is pressed.
Yes
Yes
Check of indoor fan motor
A
Check of remote controller and receiver P.C. board
B
Indoor fan does not operate.
Turn OFF power supply.
Check connector (Fan motor) visually.
Replace the indoor fan motor.
Disconnect lead wires from connector (Indoor fan motor).
Measure resistance between lead wires No.1 and No.4 and then No.3 and No.4 of the indoor fan
motor.
Are lead wires connected?
Reconnect the lead wires.
Is soldered point of the connector
correctly soldered?
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 con-
troller.
Replace the batteries.(Refer to page 11.)
Turn on a radio to AM and press switch
on remote controller.
Is noise heard from radio?
Are there any fluorescent lights of
inverter or rapid-start type within
the range of 1m?
Is the voltage approx. 4V DC ?
Replace the indoor electronic control
P.C. board.
Replace the receiver P.C. board.
Replace the remote controller.
●
Reinstall the unit away from lights.
●
Attach a filter on receiving part.
Yes ( 0 or
∞
)
No
(others)
Yes
No
Yes
No
Is LCD display on remote
controller visible?
Remove the batteries, then set them back
and press the RESET button. Check if the
unit operates with the remote controller.
Yes
Does the unit operate with remote
controller?
Yes
OK
No
(not clear)
Yes
No
No
No(5V or 0V DC)
No
+
–
Switch on the remote controller.
w
Check if the remote controller is exclusive for this air conditioner.
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