14
2. Trouble criterion of main parts
MSZ-A09YV -
MSZ-A12YV -
E1
E1
Part name
Figure
Check method and criterion
Indoor fan motor(MF)
INNER FUSE
136
i
3
:
CUT OFF
WHT – BLK
BLK – RED
Abnormal
Open or
short-circuit
Normal
MSZ-A09YV
303
"
~ 329
"
287
"
~ 311
"
MSZ-A12YV
396
"
~ 430
"
320
"
~ 348
"
Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C)
Normal
8 k
"
~ 20 k
"
Abnormal
Open or short-circuit
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(MAIN), RT13(SUB))
Vane
motor(MV)
Motor part
Sensor part
Measure the resistance between the terminals with a tester.
(Part temperature 10˚C ~ 30˚C)
BRN – YLW
YLW – GRY
Abnormal
Remain 0V or 5V
Normal
4.5 ~ 5.5V
Measure the voltage power ON.
(When fan revolved one time)
0V
➔
5V
➔
0V
(Approx.)
Normal
BRN-other one
Abnormal
Open or short-circuit
Measure the resistance between the terminals with a tester.
(Part temperature 10
°
C ~ 30
°
C)
Color of lead wire
Color of lead wire
BLK
RED
WHT
GR
Y
YL
W
BRN
240
"
~ 260
"
Color of lead wire
MAIN
AUX.
FUSE
RED
YLW
BRN
ORN
GRN
ROTOR
Check of indoor fan motor
A
When OPERATION INDICATOR lamp flashes 3-time.
Indoor fan does not operate.
Turn OFF the
power supply and
check the connector
CN 211 visually.
No(others)
Disconnect connector from
CN 211 on indoor electronic
control P.C. board.
Measure resistance
between lead wire
1
and
5
and then
3
and
5
.
Yes(0 or
∞
)
Is resistance
0
"
(short circuit) or
∞
(open circuit)?
Replace the
indoor fan motor.
Replace the
indoor
electronic
control P.C.
board.
CN211
1
3
5
Fan
motor
Indoor electronic
control P.C. board
OB327 --1qxp 04.1.8 1:42 PM Page 14
