OB274-37
Yes
Yes
Yes
No
Yes
Yes
Yes
No
No
Check of remote controller and receiver P.C. board
B
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote
controller.
Replace the batteries.(Refer to page 33.)
Turn 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 3.28ft.?
MS12/15/17
Connect properly.
Replace the receiver P.C. board.
MS09
Is the connector connecting receiver
P.C. board and indoor electronic con-
trol P.C. board properly connected?
Does the unit receive signal of
ON/OFF with the remote controller
and emit a beep tone?
Replace the remote controller.
Replace the power monitor, receiver
P.C. board with the indoor electronic
control P.C. board.
●
Re-install the unit away from lights.
●
Attach a filter on receiving part.
Switch on the remote controller
Is LCD display on remote con-
troller displayed?
Remove 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
No
(not clear)
Yes
No
No
No
No
OK
Connect properly.
No
Replace the indoor electronic
control P.C. board.
Replace the auto restart assembly.
Is auto restart assembly properly
connected?
Does the unit receive signal of
ON/OFF with remote controller
and emit a beep tone?
Does the unit receive signal of
ON/OFF with remote controller
and emit a beep tone?
OK
OK
OK
w
Check the remote controller is exclusive
for this air conditioner.
w
In case of replacing the receiver P.C.
board of MS09TW, replace the indoor
electronic control P.C. board with it
because they are unified.
