Mitsubishi Electronics MSZ-GA22VA, MSZ-GA25VA, MSZ-GA35VA Indoor unit failure mode table

2. Indoor unit failure mode table

NOTE:Blinking patterns of this mode differs from the ones of Troubleshooting check table(9-4.).

Left lamp of	Abnormal point	Detection method	Check point
OPERATION
	(Failure mode)
INDICATOR lamp
Not lighted	Normal	–	–
1-time flash	Room temperature	When the room temperature thermistor	Refer to the characteristics of the room
		short or open circuit is detected every 8
every 0.5-second	thermistor		temperature thermistor (9-7.).
		seconds during operation.
2-time flash		When the indoor coil thermistor short or	Refer to the characteristic of the main
	Indoor coil thermistor	open circuit is detected every 8 seconds	indoor coil thermistor, the sub indoor coil
2.5-second OFF
		during operation.	thermistor (9-7.).
3-time flash	Serial signal error	When the serial signal from the outdoor unit is	Refer to 9-6.D"How to check miswiring
2.5-second OFF		not received for a maximum of 6 minutes.	and serial signal error".
11-time flash		When the rotational frequency feedback	Refer to 9-6.A"Check of indoor fan
	Indoor fan motor	signal is not emitted during 12-second the
2.5-second OFF			motor".
		indoor fan operation.
12-time flash		When it cannot properly read data in the	Replace the indoor electronic control
	Indoor control system	nonvolatile memory of the indoor electronic
2.5-second OFF			P.C. board.
		control P.C. board.

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