Mitsubishi Electronics MSZ-FA35VA, MSZ-FA25VA service manual Plasma, Air, Purifying

Lighted · Flashing of AREA lamp(left-hand side lamp) indicates abnormality.

Blinking

Not lighted

NOTE : Before taking measures, make sure that the symptom reappears for accurate troubleshooting. Self check table

No.	Abnormal	Operation indicator lamp	Symptom	Detection method	Check point
	point
	Indoor	Left lamp of AREA lamp flashes.	Indoor unit	When it cannot properly read data in the
		4-time flash
			and outdoor		• Replace the indoor electronic
1	control			nonvolatile memory of the indoor electronic
			unit do not		control P.C. board.
	system			control P.C. board.
			operate.
		2.5-second OFF

Lighted · Flashing of All lamps indicate abnormality.

Blinking

Not lighted

No.	Abnormal	Operation indicator lamp	Symptom	Detection method	Check point
	point
	Attachment	All lamps flash at the same time.	Indoor unit
		0.5-second ON		When the electricity is not conducted to the	• Refer to 9-6.E"Check of
	of the		and outdoor
1					installation of the horizontal
	horizontal		unit do not	interlock switch (Fan) of the horizontal vane.	vane".
	vane		operate.
		0.5-second OFF

Lighted

· Flashing of AREA lamp(both lamps) indicates abnormality.

Blinking

· POWER lamp is lighted.

Not lighted

No.	Abnormal	Operation indicator lamp	Symptom	Detection method	Check point
	point
	MXZ type	Both lamps flash	Outdoor unit	When the operation mode of the each indoor	• Unify the operation mode.
	Operation		operates but	unit is differently set to COOL(includes DRY)
1					Refer to service manual
			indoor unit	and HEAT at the same time, the operation
	mode
					OB377.
		2.5-second OFF	does not	mode of the indoor unit that has operated at
	setting
			operate.	first has the priority.

Lighted · Flashing of PLASMA/WASH lamp indicates abnormality.

Blinking

Not lighted

No.	Abnormal	Operation indicator lamp	Symptom	Detection method	Check point
	point
	PLASMA	PLASMA/WASH lamp flashes.	Indoor unit
	DEODORIZING/			When PLASMA DEODORIZING power or
	PLASMA	2-time flash	and outdoor		• Replace the indoor electronic
1				PLASMA AIR PURIFYING power can not be
	AIR		unit do not		control P.C. board.
	PURIFYING		operate.	turned OFF.
	power control	2.5-second OFF

NOTE : When the indoor unit has started operation and the above detection method has detected an abnormality (the first detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with OPERATION INDICATOR lamp flashing.

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