Trouble Criterion Of Main Parts - Mitsubishi Electric MSH-07NV Service Manual

10-2-2 Trouble criterion of main parts

MSH-07NV- MSH-09NV-
E1
MSH-18NV- MSH-24NV-
E1
MSH-07NV- MSH-09NV-
E2
MSH-18NV- MSH-24NV-
E2
Part name
Room Measure the resistance with a tester.
temperature
(Part temperature 10°C ~ 30°C)
thermistor
Indoor coil
thermistor
Measure the resistance with a tester.
(Part temperature –10°C ~ 40°C)
Defrost
thermistor
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
Compressor
Measure the resistance between the terminals with a tester.
(Coil wiring temperature10°C ~ 30°C)
Indoor fan
motor
Measure the voltage Power ON.
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
Outdoor fan
motor
WHT-BLK
BLK-RED
BLK-YLW
YLW-RED
Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)
Vane motor
50
MSH-12NV-
E1
E1
MSH-12NV-
E2
MSH-18NV-
E2
Check method and criterion
Normal
8kΩ ~ 20kΩ
Normal
5kΩ ~ 60kΩ
07NV
09NV
C-R 3.67~4.50Ω
2.88~3.52Ω 1.85~2.28Ω
Ω
C-S 5.13~6.28Ω 3.44~4.21Ω
5.07~6.20
07/09/12NV
WHT-BLK 280 ~ 303Ω
BLK-RED 313 ~ 336Ω
BRN-YLW
4.5 ~ 5.5V
(When fan revolved one time)
YLW-GRY
0V 5V 0V
07/09NV
192~236Ω 114 ~ 141Ω
118 ~ 146Ω
373~458Ω
–
–
Normal
07/09/12NV 282 ~ 305Ω
18/24NV 358 ~ 388Ω
E1
E2
E3
Abnormal
Opened or short-circuited
Abnormal
Opened or short-circuited
Normal
12NV 18NV 24NV
1.05~1.30Ω 0.85~1.04Ω
2.38~2.91Ω 1.83~2.23Ω
Normal
18/24NV
176 ~ 192Ω
240 ~ 261Ω
Normal Abnormal
Remain 0V or 5V
(Approx.)
Normal
12NV
18NV 24NV
102 ~ 126Ω
55.3 ~ 67.6Ω
97.9 ~ 120Ω
–
– –
26.6 ~ 32.6Ω
–
–
55.5 ~ 67.8Ω
Abnormal
Opened or short-circuited
Abnormal
Opened or
short-circuited
Abnormal
Opened or
short-circuited
07NV
09NV
12NV
18NV
Abnormal
24NV
Opened or
short-circuited
Vane motor
PNK
ORN
RED
Figure
WHT
C
P
AUX. MAIN
S R
BLK
RED
MAIN
AUX.
FUSE
BLK RED WHT
MAIN
AUX.
P
BLK RED WHT
MAIN
AUX.
P
BLK RED ORN WHT
MAIN
AUX.1AUX.2
P
C
BLK YLW REDORN WHT
ROTOR
YLW BLU
P INNER PROTECTOR