FILE NO. SVM-05026
– 15 –
4. WIRING DIAGRAM
4-1. Indoor Unit
Table 4-1-1 Simple Check for Failure Diagnosis
Diagnosis Result
Check if the OPERATION indicator goes on and off when the
main switch or breaker is turned on.
(Check the primary and secondary voltage of the transformer.)
Check the power supply voltage between
1
and
2
.
(Refer to the name plate.)
(Check the primary and secondary voltage of the transformer.)
Check the fluctuating voltage between
2
and
3
. (15~60VDC)
Check if the fuse blows out.
(Check the R04 of the varistor.)
Check the voltage at the No. 4 pin on CN13 connector of the
infrared receiver.
(Check the transformer and the power supply circuit of the
rated voltage.)
Check the voltage at the white lead of the louver motor.
(Check the transformer and the power supply circuit of the
rated voltage.)
Check the voltage at the No. 1 pin on CN10 connector.
(Check the DB01, R05 and C03.)
Refer to the service data for the detailed failure diagnosis.
Check Item
OPERATION
INDICATOR
TERMINAL
BLOCK
FUSE
3.15A
DC5V
DC12V
DC325V
(DC310~340V)
1
2
3
4
5
6
MCC-861
BLK
HA
JEM-A
CN21
TERMINAL
BLOCK
LOUVER MOTOR
FUSE
T3.15A
4
3
2
1
CN08
CN24
CN13
(W HI)
CN25
(W HI)
INFRAR
ED RAYS
RE
C
E
IV
IN
G A
N
D
IN
DI
CA
TI
N
G
P
A
RT
S
1
3
4
5
6
7
8
11
2
1
2
3
4
5
6
7
8
9
10
11
10
9
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
1
2
1
2
1
2
1
2
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
3 4
2
1
MCC-861
BLK
THERMO SENSOR
(TA)
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
BLU
WHI
CN03
(WHI)
CN01
(BLU)
CN07
(W HI)
WHI
YEL
YEL
YEL
YEL
F01
BLK
BLK
250VAC
CN23
HEAT EXCHANGER
SENSOR
(TC)
5
BLK
W HI
RED
COLOR INDICATION
BRW
RED
WHI
YEL
BLU
BLK
GRY
PNK
ORN
GRN&YEL
GRN
:
:
:
:
:
:
:
:
:
:
:
BROWN
RED
WHITE
YELLOW
BLUE
BLACK
GRAY
PINK
ORANGE
GREEN & YELLOW
GREEN
INDOOR
UNIT
OUTDOOR
UNIT
MAIN P.C. BOARD
WP-004
LINE
FILTER
Power
supply circuit
+12 VDC
+5 VDC
Fan Motor
Drive circuit
AC FAN MOTOR
150°
C
6
1 2 3 4 5
6
1 2 3 4 5
1 2 3
1 2 3
5
3
1
5
3
1
YE
L
GR
Y
BR
W
WH
I
BL
K
RE
D
CN11
CN10
6
３
２
R04
