Mitsubishi Electric PLFY-P-VLMD-E Service Manual download pdf (Page 15)

TROUBLE SHOOTING

7-1. Simple check of main components

Motor terminal

Relay connector

Red-Black

40.5Ω

White-Black

48.8Ω

Red

White

Black

Relay connector

Protector

Check points

Measure the resistance between the terminals using a tester.

(Surrounding temperature: 20˚C to 30˚C)

Measure the resistance between the terminals using a tester.

(Surrounding temperature: 20°C)

Measure the resistance between the terminals using a tester.

Parts name

Room temperature

thermistor (TH21)

Disconnect the connector, then measure the resistance using a tester.

(Surrounding temperature 10°C to 30°C)

(Refer to the thermistor)

Liquid pipe thermistor

(TH22)

Gas pipe thermistor

(TH23)

Normal

4.3kΩ~9.6kΩ

Abnormal

Open or short

Normal

572Ω

(Model:20~100)

430Ω (Model:125)

Abnormal

Open or short

Normal

(2)-(6)

Yellow-

Blown

(1)-(5)

White-Red

(3)-(5)

Orange-Red

(4)-(6)

Blue-Brown

Abnormal

Open or

short

Measure the resistance between the terminals using a tester.

0˚C/6.0kΩ,10˚C/3.9kΩ

20˚C/2.6kΩ,25˚C/2.2kΩ

30˚C/1.8kΩ,40˚C/1.3kΩ

Linear expansion

valve

Drain sensor

Drain-pump

Disconnect the connector then measure the resistance valve using a tester.

(Surrounding temperature: 20°C)

150Ω±10%

White

Yellow

Orange

Blue

Red

Brown

CN60

Red

LEV

517.6Ω

(1)-(2) White-Black

(1)-(3) White-Blue

369.6Ω

420.6Ω 310.1Ω

(1)-(4) White-Red

352.2Ω 268.9Ω

(1)-(5) White-Orange

304Ω 229Ω

(1)-(9) White-Yellow

547Ω 431Ω

411Ω

366.4Ω

328.7Ω

290Ω

521Ω

462.5Ω

397.7Ω

341.8Ω

308Ω

553Ω

50, 63 80 10020 to 40

Measure the resistance between the terminals using a tester. (Surrounding temperature: 20

°C

to 30

°C

)

Vane motor

Fan motor

Disconnect the connector and measure the resistance using a tester. (Surrounding temperature: 25°C)

Normal

CNT(1)~(3)

CN3T(1)~(3)

App.112.5Ω (Model:20~100)

App.15Ω (Model:125)

App.1.2Ω (Model:20~100)

App.4Ω (Model:125)

Model:20~100

Abnormal

Open or short

Normal

1-2

1-3

1-4

1-5

App.300Ω

Model:125

App.18kΩ

Abnormal

Open or short

Power transformer

Relay connector

Protector

White

Black

Blue

Red

ange

Bro

Yellow

Normal

125

Abnormal

Open or short

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 34 35

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Mitsubishi Electric PLFY-P-VLMD-E Service Manual Page 15

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