– 9 –
Diagnosis result
Check to see if the OPERATION indicator goes on and off when the main
switch or breaker is turned on. (Check the transformer and receiver unit.)
Check the power supply voltage between
and
. (Refer to the name
plate.) (Check the primary and secondary voltage of the transformer.)
Check for fluctuate voltage between
and
.
Check to see if the fuse blows out.
(Check the R01 of the Varistor.)
Check the voltage between
and
on CN11 connector.
(Check the transformer and the power supply circuit of the rated voltage.)
Check the voltage between
and
on CN14 connector.
(Check the transformer and the power supply circuit of the rated voltage.)
Check items
OPERATION
indicator
Terminal
block
Fuse
6.3A
DC 5V
DC 12V
Color
Identification
BRW : BROWN
RED : RED
WHI : WHITE
YEL : YELLOW
BLU : BLUE
BLK : BLACK
GRY : GRAY
PNK : PINK
ORN : ORANGE
GRN : GREEN
PUR : PURPLE
GRN : GREEN &
&YEL
YELLOW
1
2
3
4
5
4. WIRING DIAGRAM
Table 4-1-1 Quick check for failure diagnosis
Refer to the service data for the detailed failure diagnosis.
BLK
WHI
RED
BLU
PUR
GRY
BLK
HEAT
EXCHANGER
SENSOR
(TC)
INFRARED RAYS
RECEIVING AND
INDICATING PARTS
MAIN P.C. BOARD
MCC-875
DRAIN-UP KIT
(OPTION)
FAN MOTOR
3
4
2
5
1
5
1 2 3 4 5
1 2
1 2
1 2
1 2
1 2 3
1 2
3
1
3
1
2
1
3
2
1
3
2
1
3
1
3
5
3
1
3
1
3 4 5
4
3
2
1
5
4
3
2
1
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
SWITCH P
.C.
BO
ARD
MCC-5026
BLK
BLK
BLK
2
1
2
1
THERMO
SENSOR
(TA)
TRANSFORMER
FLOAT
SWITCH
BLK
BLK
BLK
BLK
2
1
2
1
2
4
3
2
1
1
2
1
2
1
WHI
CN11
CN05
CN12
CN13
CN07
CN17
CN04
CN03
DRAIN-PUMP
MOTOR
CN20
CN01
CN19
CN06
CN30
CN15
CN14
CN09
P02
P03
MF-CAPA
R01
RY01
GRY
GRN
BLU
WHI
BLK
RED
BLU
BLU
YEL
BLK
BLU
ORN
FUSE
T6, 3A, AC 250V
220 –240V
~
50Hz
220V
~
60Hz
CONNECTION
CABLE
INDOOR
TERMINAL
BLOCK
RED
WHI
EARTH
EARTH
RED
BLK
WHI
GRY
GRY
WHI
RED
BLU
PUR
GRY
2
1
3
2
1
3
YEL
ORN
RED
BRW
R02
R03
SG01
DRAIN-UP KIT
(OPTION)
