Mitsubishi Electric MS-18NV Service Manual page 20

MS-18NV -
E4
2. Trouble criterion of main parts
Part name
Room
Measure the resistance with a tester.
temperature (Part temperature 10°C ~ 30°C)
thermistor
Indoor coil
thermistor
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
Compressor
C-R
C-S
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
Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)
Vane motor
Check method and criterion
Normal
8k½ ~ 20k½ Opened or short-circuited
Normal
0.95 ~ 1.17½
1.92 ~ 2.36½
Normal
176 ~ 192½
WHT-BLK
BLK-RED 240 ~ 261½
Normal
BRN-YLW 4.5 ~ 5.5V
(When fan revolved one time)
YLW-GRY
0V 5V 0V
(Approx.)
Normal
102 ~ 126½
97.9 ~ 120½
Normal
Opened or short-circuited
358 ~ 388½
Abnormal
Abnormal
Opened or
short-circuited
Abnormal
Opened or
short-circuited
Abnormal
Remain 0V or 5V
Abnormal
Opened or
short-circuited
Abnormal
20
Figure
WHT C
P
~
AUX MAIN
R
S
BLK
RED
MAIN
AUX
FUSE
MAIN
AUX
P
BLK RED ORN WHT
PNK
ROTOR
ORN
RED
YLW BLU
INNER PROTECTOR
P