OB274-35
Measure the resistance between the terminals with a tester.
(Part temperature14°F ~ 104°F)
Measure the resistance between the terminals with a tester.
(Part temperature 14°F ~ 104°F)
Measure the resistance between the terminals with a tester.
(Part temperature 50°F ~ 86°F)
Compressor
(MC)
Room
temperature
thermistor(RT11)
MS09TW MS12TN MS15TN MS17TN MU09TW MU12TN MU15TN MU17TN
2. Trouble criterion of main parts
Part name
Indoor coil
thermistor(RT12)
Indoor fan
motor(MF)
Motor par
t
Sensor par
t
Motor par
t
Outdoor fan
motor(MF)
Vane motor(MV)
Check method and criterion
Measure the resistance with a tester.
(Part temperature 50°F ~ 86°F)
Measure the voltage Power ON.
Measure the resistance between the terminals with a tester.
(Part temperature 50°F ~ 86°F)
Figure
WHT
RED
BLK
P
1
2
3
MS09
RED
BLK
FUSE
MAIN
AUX.
YLW
GRY
BRN
WHT
1
2
3
MS12/15/17
RED
ORN
FUSE
BLU
BLK
WHT
YLW
AUX.1
MAIN
AUX.2
AUX.3
AUX.4
BRN
Normal
8k
"
~ 20k
"
Abnormal
Open or short-circuit
Normal
MU09
0.7~1.0
"
1.0~1.4
"
1.9~2.4
"
1.4~1.9
"
2.4~3.0
"
1.4~1.8
"
2.3~2.9
"
MU12
MU15
MU17
C-R
C-S
Normal
MS09
Abnormal
Open or
short-circuit
76~83
"
WHT-BLK
BLK-RED
BRN-YLW
YLW-GRY
Normal
MS09
4.5 ~ 5.5V
Abnormal
Remain 0V or 5V
(When fan revolved one time)
0V
➔
5V
➔
0V (Approx.)
Normal
Abnormal
Open or short-circuit
MS09
282 ~ 306
"
MS12/15/17
358 ~ 388
"
Abnormal
Open or
short-circuit
70~76
"
2.7~3.4
"
Normal
MS12/15
65~72
"
8~10
"
52~57
"
10~12
"
MS17
WHT-BLK
BLK-YLW
4~6
"
5~7
"
4~5
"
5~6
"
YLW-BLU
BLU-BRN
28~31
"
35~39
"
BRN-RED
Abnormal
Open or
short-circuit
Normal
MU09
54~67
"
58~72
"
102~126
"
97~120
"
MU15/17
WHT-BLK
BLK-RED
Abnormal
Open or
short-circuit
MU12
116~143
"
215~264
"
MU15/17
RED
AUX.
MAIN
ORN
BLK
WHT
P
MU09/12
RED
AUX.
MAIN
BLK
WHT
P
RED
YLW
BRN
ORN
GRN
ROTOR
P
:INNER PROTECTOR
MS09
YLW
RED
BLU
ORN
PNK
ROTOR
MS12/15/17
BRN- other one RED- other one