Trouble Criterion Of Main Parts - Mitsubishi Electric MSH-18RV Service Manual

2. Trouble criterion of main parts

MSH-18RV -
E1
MSH-24RV -
E1
Part name
Room Measure the resistance with a tester.
temperature
(Part temperature 10°C ~ 30°C)
thermistor (RT11)
Indoor coil
thermistor (RT12)
Measure the resistance with a tester.
Defrost
(Part temperature –10°C ~ 40°C)
thermistor
(RT61)
Measure the resistance with a tester.
Ambient temper-
(Part temperature –10°C ~ 40°C)
ature thermistor
(RT63)
MSH-24RV only
Measure the resistance between the terminals with a tester.
(Part temperature –10°C ~ 40°C)
Compressor
(MC)
Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)
Indoor fan
motor (MF) Measure the voltage Power ON.
Measure the resistance between the terminals with a tester.
(Part temperature –10°C ~ 40°C)
Outdoor fan
motor (MF)
Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)
Vane motor
(MV)
MUH-18RV -
E1
MUH-24RV -
E1
Check method and criterion
Normal
8kΩ ~ 20kΩ
Normal
5kΩ ~ 60kΩ
Normal
5kΩ ~ 60kΩ
MSH-18RV
C-R 0.90Ω ~ 1.12Ω
1.79Ω ~ 2.21Ω
C-S
WHT-BLK
BLK-RED
BRN-YLW
4.5 ~ 5.5V
(When fan revolved one time)
YLW-GRY
0V 5V 0V
MSH-18RV
WHT-BLK 102Ω ~ 126Ω
BLK-RED 97Ω ~ 120Ω
BLK-YLW –
YLW-RED –
Normal
358 ~ 388Ω
Abnormal
Open or short-circuit
Abnormal
Open or short-circuit
Abnormal
Open or short-circuit
Normal
MSH-24RV
0.84Ω ~ 1.04Ω
1.82Ω ~ 2.24Ω
Normal
176Ω ~ 192Ω
240Ω ~ 261Ω
Normal Abnormal
Remain 0V or 5V
(Approx.)
Normal
MSH-24RV
55Ω ~ 68Ω
–
26Ω ~ 33Ω
55Ω ~ 68Ω
Abnormal
Open or short-circuit
57
WHT
AUX
Abnormal
S
Open or
RED
short-circuit
Abnormal
Open or
short-circuit
FUSE
MSH-18RV
Abnormal
BLK
MSH-24RV
Open or
short-circuit AUX.1 AUX.2
BLK
PNK
ORN
RED
P :INNER PROTECTOR
Figure
C
P
~
MAIN
R
BLK
MAIN
AUX
MAIN
AUX
P
RED ORN WHT
MAIN
P
C
YLW RED ORN WHT
ROTOR
YLW BLU