Mitsubishi Electronics PUZ-A24NHA2, PUZ-A42NHA2-BS, PUZ-A30NHA2, PUY-A36NHA2 HOW to Check the Parts

10-6. HOW TO CHECK THE PARTS

PUZ-A18/24/30/36/42NHA2 PUZ-A18/24/30/36/42NHA2-BS PUY-A12/18/24/30/36/42NHA2 PUY-A12/18/24/30/36/42NHA2-BS

Parts name

Check points

Thermistor (TH3)

Disconnect the connector then measure the resistance with a tester.

<Outdoor pipe>

(At the ambient temperature 10:~30:, 50˚F~86˚F)

Thermistor (TH4)

Normal

Abnormal

<Discharge>

TH4

160k"~410k"

Thermistor (TH6)

<Outdoor 2-phase pipe>

TH3

Thermistor (TH7)

TH6

4.3k"~9.6k"

Open or short

<Outdoor>

TH7

Thermistor (TH8)

TH8

39k"~105k"

<Heatsink>

Fan motor(MF1,MF2)

Refer to next page.

Solenoid valve coil

Measure the resistance between the terminals with a tester.

<Four-way valve>

(At the ambient temperature 20:, 68˚F)

(21S4)

Normal

Abnormal

A18-36

A42

Open or short

1500±150"

2350±170"

Motor for compressor

Measure the resistance between the terminals with a tester.

(MC)

U

(Winding temperature 20:, 68˚F)

Normal

Abnormal

V

A12, 18

A24, 30, 36

A42

Open or short

W

0.320"

0.880"

0.266"

Linear expansion valve

Disconnect the connector then measure the resistance with a tester.

(LEV-A)

(Winding temperature 20:, 68˚F)

For A12, 18

Red

Normal

Abnormal

M

1

Brown

2

Red - White

Red - Orange

Brown - Yellow

Brown - Blue

Blue

3

Open or short

46±4"

Orange

4

Yellow

5

White

6

Linear expansion valve

Disconnect the connector then measure the resistance with a tester.

(LEV-A)

(Winding temperature 20:, 68˚F)

For A24-42

Gray

Normal

Abnormal

M

1

Gray - Black

Gray - Red

Gray - Yellow

Gray - Orange

2

Orange

Open or short

46±3"

3

Red

4

Yellow

5

Black

6

Solenoid valve coil

Measure the resistance between the terminals with a tester.

(At the ambient temperature 20:, 68˚F)

<Bypass valve>

(SV)

Normal

Abnormal

For A24-36 only

1450±150"

Open or short

55