34
2. Trouble criterion of main parts
MSH24WN MUH24WN
Part name
Figure
Check method and criterion
Measure the resistance between the terminals with a tester.
(Part temperature 14˚F ~ 104˚F)
Compressor(MC)
INNER
PROTECTOR
320
i
9
-
F OPEN
198
i
20
-
F CLOSE
Indoor fan motor(MF)
INNER
PROTECTOR
275
i
9
-
F OPEN
187
i
27
-
F CLOSE
Normal
Terminal
C – R
C – S
0.74
"
~ 0.91
"
1.84
"
~ 2.26
"
Abnormal
Open or
short-circuit
Measure the resistance with a tester.
(Part temperature 14˚F ~ 104˚F)
Color of lead wire
WHT – BLK
BLK – RED
Abnormal
Open or
short-circuit
Normal
35
"
~ 39
"
65
"
~ 71
"
Measure the resistance with a tester.
(Part temperature 50˚F ~ 86˚F)
Normal
8 k
"
~ 20 k
"
Abnormal
Open or short-circuit
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(main), RT13(sub))
Discharge temperature
thermistor(RT62)
Ambient temperature
thermistor(RT63)
Outdoor fan motor(MF)
INNER
PROTECTOR
293
i
14
-
F OPEN
190
i
27
-
F CLOSE
Horizontal vane
motor(MV1)
Vertical vane
motor(MV2)
R.V. coil(21S4)
LEV(Expansion valve)
Measure the resistance with a tester.
Before measurement, hold the thermistor with your hands to warm it up.
(Part temperature 32˚F ~ 104˚F)
Normal
120 k
"
~ 800k
"
Abnormal
Open or short-circuit
Normal
5 k
"
~ 60 k
"
Abnormal
Open or short-circuit
Motor part
Sensor part
Measure the resistance between the terminals with a tester.
(Part temperature 50˚F ~ 86˚F)
Measure the voltage power ON.
Color of lead wire
BRN – YLW
YLW – GRY
Abnormal
Remain 0V or 5V
Normal
4.5 ~ 5.5V
(When fan revolved one time)
0V
➔
5V
➔
0V
(Approx.)
Measure the resistance between the terminals with a tester.
(Part temperature 14˚F ~ 104˚F)
Color of lead wire
WHT – BLK
BLK – RED
Abnormal
Open or
short-circuit
Normal
51
"
~ 62
"
50
"
~ 61
"
Normal
282
"
~ 306
"
Abnormal
Open or short-circuit
Measure the resistance between the terminal with a tester.
(Part temperature 50
°
F ~ 86
°
F)
Measure the resistance between the terminals with a tester.
(Part temperature 14˚F ~ 104˚F)
Normal
2.673 k
"
~ 3.268 k
"
Abnormal
Open or short-circuit
Color of lead wire
WHT – RED
RED – ORN
YLW – BRN
BRN – BLU
Abnormal
Open or
short-circuit
Normal
30.3
"
~ 37.0
"
Measure the resistance with a tester.
(Part temperature : 14˚F ~ 104˚F)
Measure the resistance with a tester.
(Part temperature 14˚F ~ 104˚F)
Normal
5 k
"
~ 60 k
"
Abnormal
Open or short-circuit
Defrost thermistor
(RT61)
P
P
R
C
S
RED
BLK
WHT
MAIN
AUX.
1
2
3
RED
BLK
MAIN
AUX.
YLW
GRY
BRN
WHT
1
2
3
RED
AUX.
MAIN
ORN
BLK
WHT
P
RED
YLW
BRN
ORN
GRN
ROTOR
LEV
WHT
6
RED
1
ORN
4
YL
W
5
BRN
2
BLU
3
:INNER PROTECTOR
P
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