OPERATION INDICATOR

No.

Abnormal

 

 

Operation indicator lamp

Symptom

Condition

Correspondence

point

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Left lamp lights and lower lamp flashes.

 

 

 

 

MXZ type

Lower lamp flashes.

Outdoor unit

The operation mode of the each indoor unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is differently set to COOL (includes DRY) and

• Unify the operation mode.

 

Operation

 

 

 

 

 

 

 

 

 

operates but

1

 

 

 

 

 

 

 

 

 

HEAT at the same time, the operation mode

Refer to outdoor unit service

 

mode

2.5-second OFF

indoor unit does

of the indoor unit that has operated at first has

manual.

 

setting

 

 

 

 

 

 

 

 

 

not operate.

the priority.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8-5. TROUBLE CRITERION OF MAIN PARTS

MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA

MSY-A15NA MSY-A17NA MSY-A24NA

Part name

Check method and criterion

Figure

 

Room temperature

Measure the resistance with a tester.

 

 

 

thermistor(RT11)

 

 

 

Indoor coil thermistor

Refer to 8-7. "Test point diagram and voltage",

 

 

"Indoor electronic control P.C. board", the chart of thermistor..

 

 

(RT12(MAIN),RT13(SUB))

 

 

 

 

Indoor fan motor(MF)

Check 8-6. .

 

 

 

 

Measure the resistance between the terminals with a tester.

RED

 

Horizontal vane

(Part temperature 50 ~ 86°F)

 

 

 

ROTOR

motor(MV)

Color of the lead wire

Normal

YLW

 

MSZ-A09/12/15/17NA

BRN-other one

235 ~ 255 Ω

BRN

 

MSY-A15/17NA

ORN

GRN

 

 

 

Horizontal vane

Measure the resistance between the terminals with a tester.

RED

 

(Part temperature 50 ~ 86°F)

 

 

motor(MV1)

 

ROTOR

Vertical vane

Color of the lead wire

Normal

YLW

 

motor(MV2)

BRN-other one

282 ~ 306 Ω

BRN

 

MSZ-A24NA

ORN

GRN

MSY-A24NA

 

 

 

 

 

 

17

Page 17
Image 17
Logitech MSZ-A09NA, OB450 REVISED EDITION-B service manual Trouble Criterion of Main Parts, MXZ type

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