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MS24WN MU24WN
Part name FigureCheck method and criterion
Measure the resistance between the terminals with a tester.
(Part temperature 14˚F ~ 104˚F)
Compressor(MC)
INNER
PROTECTOR
320i 9-F OPEN
198i20-F CLOSE
Indoor fan motor(MF)
INNER
PROTECTOR
275i 9-F OPEN
187i27-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
293i14-F OPEN
190i27-F CLOSE
Horizontal vane
motor(MV1)
Vertical vane
motor(MV2)
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)
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)
P
P
R
C
S
RED
BLK
WHT
MAINAUX.
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
RED1
ORN4
YLW5
BRN2
BLU3
:INNER PROTECTOR
P
2. Trouble criterion of main parts
OB311--1.qxp 04.1.13 9:53 AM Page 30