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2. Trouble criterion of main parts
MSZ-A18YV -
E1
MSZ-A24YV -
E1
MSZ-A26YV -
E1
Part name
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(main), RT13(sub))
Indoor fan motor(MF)
MSZ-A18YV
INNER FUSE
145: CUT OFF
MSZ-A24/A26YV
INNER
PROTECTOR
135i
5: OPEN
86i 15: CLOSE
Horizontal vane
motor(MV1)
Vertical vane
motor(MV2)
Check method and criterion
Measure the resistance with a tester.
(Part temperature 10˚C ~ 30˚C)
Normal
8 k" ~ 20 k"
Measure the resistance between the terminals with a tester.
(Part temperature 10˚C ~ 30˚C)
Color of
lead wire
MSZ-A18YV
WHT – BLK
282 " ~ 305 "
BLK – RED
141 " ~ 152 "
Measure the voltage power ON.
Color of lead wire
BRN – YLW
(When fan revolved one time)
YLW – GRY
Measure the resistance between the terminal with a tester.
(Part temperature 10°C ~ 30°C)
Normal
282 " ~ 306 "
Abnormal
Open or short-circuit
Normal
MSZ-A24/A26YV
132 " ~ 144 "
152 " ~ 166 "
Normal
4.5 ~ 5.5V
0V 5V 0V
(Approx.)
Abnormal
Open or short-circuit
14
MSZ-A18YV
Abnormal
FUSE
Open or
short-circuit
MSZ-A24/A26YV
Abnormal
Remain 0V or 5V
RED
YLW
BRN
Figure
MAIN
AUX
MAIN
AUX.
P
ROTOR
ORN
GRN
P
:INNER PROTECTOR
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