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

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Mitsubishi Electronics MSZ-GA22VA, MSZ-GA25VA, MSZ-GA35VA Trouble criterion of main parts, MXZ type Right lamp flash

MSZ-GA25VA, MSZ-GA35VA, MSZ-GA22VA specifications

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