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Mitsubishi Electric MXZ-24UV -E2 Service Manual page 27

Inverter-controlled multi system
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Table of Contents
12-4. Trouble criterion of main parts
Part name
Defrost thermistor
Evaporation / Gas pipe
temperature thermistor
Discharge temperature
thermistor
Compressor
W
RED
V
U
WHT
BLK
Outdoor fan motor
WHT
P
ORN
RED
BLU
YLW
BLK
Protector specification
Short
95I15:
Open
135I5:
R. V. coil
Linear expansion valve
WHT
LEV
RED
ORN
YLW BRN
BLU
High pressure switch
(HPS)
Measure the resistance using a tester.
(Part temperature -10°C ~ 40°C)
Normal
5kΩ ~ 55kΩ
Measure the resistance using a tester, after warming up the thermistor by holding by hand.
(Part temperature : 20°C ~40°C)
Normal
100kΩ ~ 250kΩ
Measure the resistance between terminals using a tester.
(Winding temperature : -10°C ~ 40°C)
Normal
1Each phase 0.53Ω ~ 0.66Ω
Measure the resistance between lead wires using a tester.
(Part temperature : -10°C ~ 40°C)
WHT - BLK
BLK - YLW
YLW - BLU
RED - BLK
Measure the resistance using a tester. (Part temperature -10°C ~ 40°C)
Normal
1640Ω ~ 2310Ω
Measure the resistance using a tester.(Part temperature -10°C ~ 40°C)
Lead wire color
WHT - RED
RED - ORN
YLW - BRN
BRN - BLU
Measure the resistance using a tester.
(Part temperature -10°C ~ 40°C)
HPS1
2.35 ± 0.15MPa (24 ± 1.5kg / cm
HPS2
HPS1
2.75
HPS2
Check method and criterion
Normal
69.0Ω ~ 86.0Ω
23.0Ω ~ 30.0Ω
10.0Ω ~ 13.0Ω
73.0Ω ~ 91.0Ω
Normal
43Ω ~ 52Ω
Pressure
Operation OFF
2.55 ± 0.2MPa (26 ± 2kg / cm
+
+
0.05
MPa (28
0.5
kg / cm
-
-
0.1
1.0
+
+
0
3.43
0
MPa (35
kg / cm
-
-
1.5
0.15
27
abnormal
Opened or short-circuited
abnormal
Opened or short-circuited
abnormal
Opened or short-circuited
abnormal
Opened or
short-circuited
(Not including
WHT - ORN)
abnormal
Opened or short-circuited
Abnormal
Opened or short-circuited
Normal
abnormal
2
)
Short
Other than
2
)
those list-
2
ed at left
)
Open
2
)
P Inner protector

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