Mitsubishi Electronics MXZ-32SV service manual Trouble criterion of main parts

12-4. Trouble criterion of main parts

Part name

Check method and criterion

Defrost thermistor

Measure the resistance using a tester.

(Part temperature -10°C ~ 40°C)

Evaporation / Gas pipe

temperature thermistor

Normal

abnormal

5kΩ ~ 55kΩ

Opened or short-circuited

Measure the resistance using a tester, after warming up the thermistor by holding by hand.

Discharge temperature

(Part temperature : 20°C ~40°C)

thermistor

Normal

abnormal

100kΩ ~ 250kΩ

Opened or short-circuited

Compressor

Measure the resistance between terminals using a tester.

W

(Winding temperature : -10°C ~ 40°C)

RED

V

Normal

abnormal

U

1Each phase 0.53Ω ~ 0.66Ω

Opened or short-circuited

WHT

BLK

Outdoor fan motor

Measure the resistance between lead wires using a tester.

WHT

(Part temperature : -10°C ~ 40°C)

P

ORN

Normal

abnormal

RED

BLU

WHT - BLK

69.0Ω ~ 86.0Ω

Opened or

YLW

BLK

BLK - YLW

23.0Ω ~ 30.0Ω

short-circuited

Protector specification

YLW - BLU

10.0Ω ~ 13.0Ω

(Not including

Short 95I15:￿

RED - BLK

73.0Ω ~ 91.0Ω

WHT - ORN)

Open

135I5:

Measure the resistance using a tester. (Part temperature -10°C ~ 40°C)

R. V. coil

Normal

abnormal

1640Ω ~ 2310Ω

Opened or short-circuited

Linear expansion valve

Measure the resistance using a tester.(Part temperature -10°C ~ 40°C)

WHT

Lead wire color

Normal

Abnormal

RED

LEV

WHT - RED

ORN

RED - ORN

Ω

Opened or short-circuited

YLW - BRN

21 ~ 26

BRN - BLU

YLW BRN BLU

Measure the resistance using a tester.

(Part temperature -10°C ~ 40°C)

Pressure

Normal

abnormal

High pressure switch

Operation OFF

(HPS)

Short

HPS1

2.35 ± 0.15MPa (24 ± 1.5kg / cm2)

Other than

HPS2

2.55 ± 0.2MPa (26 ± 2kg / cm2)

those list-

ed at left

HPS1

2.75 +- 0.10.05 MPa (28 +- 1.00.5 kg / cm2)

Open

HPS2

+ 0

+ 0

2

3.43 - 0.15 MPa (35

- 1.5kg / cm )

P Inner protector

28