Mitsubishi Electronics MSZ-GA22VA Trouble criterion of main parts, MXZ type Right lamp flash

OPERATION INDICATOR

Lighted · Flashing of OPERATION INDICATOR lamp (all lamps) 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
	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

OPERATION INDICATOR Lighted

Blinking

Not lighted

·Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates abnormality.

·OPERATION INDICATOR lamp (left-hand side lamp) is lighted.

No.	Abnormal	Operation indicator lamp	Symptom	Detection method	Check point
	point
	MXZ type	Right lamp 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.

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.

9-5. Trouble criterion of main parts

MSZ-GA22VA - E1 MSZ-GA25VA - E1

MSZ-GA35VA - E1

Part name

Room temperature thermistor(RT11)

Indoor coil thermistor (RT12(MAIN), RT13(SUB))

Indoor fan motor(MF)

Check method and criterion Figure

Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C)

Normal	Abnormal
8 k" ~ 20 k"	Open or short-circuit
Check 9-6. A.

Horizontal vane motor(MV)

Measure the resistance between the terminals with a tester. (Part temperature 10°C ~ 30°C)

Color of the lead wire	Normal	Abnormal
BRN-other one	235 " ~ 255 "	Open or short-circuit

RED

ROTOR

YLW

BRN

ORN GRN

16