20
Compressor
(MC)
INNER
PROTECTOR
MU-A07/A09YV
150
i
5°C OPEN
90
i
10°C CLOSE
MU-A12YV
155
i
5°C OPEN
90
i
10°C CLOSE
Part name
Outdoor fan
motor
(MF)
INNER
PROTECTOR
MU-A07/A09YV
130
i
5°C OPEN
83
i
15°C CLOSE
INNER FUSE
MU-A12YV
145
i
2°C
CUT OFF
Check method and criterion
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
Figure
P
R
C
S
RED
BLK
WHT
MAIN
AUX.
Normal
MU-A07/A09YV
361 ~ 443
Ω
381 ~ 468
Ω
196 ~ 241
Ω
201 ~ 246
Ω
WHT-BLK
BLK-RED
WHT
RED
BLK
MAIN
AUX.
FUSE
MU-A07YV -
MU-A09YV -
MU-A12YV -
E1
E1
E1
Normal
MU-A07YV
3.41~4.18
Ω
5.41~6.63
Ω
2.99~3.67
Ω
2.46~3.01
Ω
2.96~3.63
Ω
C-R
C-S
Abnormal
Open or short-circuit
4.02~4.92
Ω
MU-A09YV MU-A12YV
Abnormal
Open or short-circuit
MU-A12YV
P INNER PROTECTOR
Color of
lead wire
9-3.
Trouble criterion of main parts
A
A
Check of MU & MUX TYPE / MUH & MXZ TYPE SWITCH OVER
Start
Turn OFF the power supply (indoor / outdoor unit).
Set switch (SW2-
2
) on the indoor electronic
control P.C. board to MU type.
w
1
Does the unit operate?
OK
Yes
No
Refer to the
"Instruction of
troubleshooting."
w
1 Set the switch (SW2-
2
) on indoor electronic control P.C. board to
MU type, when the outdoor unit is MU type.
If the setting is MUH or MXZ type, the unit does not work.
Refer to 9-4. MU & MUX TYPE / MUH& MXZ TYPE SWITCH OVER AND
AUTO RESTART FUNCTION on service manual OB329.
When OPERATION INDICATOR lamp flashes 0.5-second intervals.
Outdoor unit doesn’t operate.
MU-A12YV
WHT
RED
BLK
MAIN
AUX.
P
MU-A07/A09YV
OB330-1.qxp 03.12.3 1:18 PM Page 20
