3-2. Indoor Unit (For 16k)
Refer to the service data for the detailed failure
diagnosis.
Simple Check for Failure Diagnosis
Check Item
Diagnosis Result
OPERATION
INDICATOR
TERMINAL
BLOCK
FUSE
3.15A
DC5V
DC12V
Check to see 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
and
.
(Refer to the name plate.)
(Check the primary and secondary voltage of the
transformer.)
Check the fluctuating voltage between
and
.
(15
`
60VDC)
Check to see 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.)
2
1
3
4
5
DC325V
Check the voltage at the No.1 pin on CN10
connector.
(Check the DB01, R05 and C03.)
6
&%8
`
MCC-861
BLK
`
`
P
O
W
E
R
SU
PP
LY
C
IRCU
IT
DC5V
DC12V
HA
JEM-A
CN21
LOUVER MOTOR
LINE
FILTER
FUSE
T3.15A
4
3
1
DC MOTOR
FAN MOTOR
CN08
CN24
CN13
(WHI)
CN25
(WHI)
INF
R
ARED RAY
S
RECEI
V
IN
G
AND
INDI
CAT
ING
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
11
1
2
3
4
5
6
7
8
9
10
11
1
2
1
2
1
2
1
2
1
1
4
5
4
5
6 6
3 3
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
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)
CN10
(WHI)
RED
BLK
WHI
YEL
BLU
CN07
(WHI)
WHI
YEL
YEL
YEL
YEL
F01
BLK
BLK
250VAC
CN23
HEAT EXCHANGER
SENSOR
(TC)
R04
C03
R05
6
5
BLK
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
DB01
1
WHI
RED
INDOOR
UNIT
OUTDOOR
UNIT
2 3
2
TERMINAL
BLOCK
MAIN P.C. BOARD
MCC-867or MCC-5014
FILE NO. SVM-05019
–
5
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