Vermont Casting MSY-D36NA, MSZ-D36NA, MSZ-D30NA Check of remote controller and receiver P.C. board

Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller.

B Check of remote controller and receiver P.C. board

Check if the remote controller is exclusive for this air conditioner.

Switch ON the remote controller.

Is LCD display on the remote controller visible?

Yes

Remove the batteries, then set them back and press RESET button. (Refer to 9-1.4.) Check if the unit operates with the remote controller.

Does the unit operate with the remote controller?

Yes

No

(not clear)

No

Replace the batteries. (Refer to 9-1.4.)

Turn ON a radio to AM and press switch ON the remote controller.

OK

Is noise heard from radio?		No
	Yes
Are there any fluorescent lights of
inverter or rapid-start type within the		Yes
range of 3.28 ft.?
	No

Measure the voltage between receiver P.C. board connector CN301 No.2(+) and No.3(-) when the remote controller button is pressed.

Is the voltage approx. 4VDC?		Yes
	No (5 or 0 VDC)

Replace the remote controller.

•Reinstall the unit away from lights. •Attach a filter on receiving part.

Replace the remote controller.

Replace the receiver P.C. board.

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