Wiring Diagram; Indoor Unit - Carrier 42NQV009E Service Manual

4-1. Indoor Unit

COLOR INDICATION
:
BRW BROWN
:
RED RED
:
WHI WHITE
:
YEL YELLOW
:
BLU BLUE
:
BLK BLACK
:
GRY GRAY
:
PNK PINK
:
ORN ORANGE
:
GRN&YEL GREEN & YELLOW
:
GRN GREEN
HEAT EXCHANGER
SENSOR
(TC)
THERMO SENSOR
(TA)
CN25
(W HI)
1
1
2 2
3 3
4
4
5
5
6
6
7
7
8
8
9 9
10 10
11 11
MCC-861 MCC-861
1

4. WIRING DIAGRAM

TERMINAL
2 1
BLOCK
BLK
CN24
CN01
(BLU)
BLK
1 1
BLK
2 2
CN03
FUSE
(W HI)
F01
BLK
1 T3.15A
1
BLK
2 2
250VAC
CN13
(W HI)
BLU
1 1
BLU
2
2
BLU
3 3
BLU
4
4
BLU
5 5
BLU
6 6
BLU
7 7
BLU
8 8
MAIN P.C. BOARD
BLU
9 9
BLU
WP-004
10 10
WHI
11 11
4
Simple Check for Failure Diagnosis
Check Item
Check to see if the OPERATION indicator goes on
1
OPERATION and off when the main switch or breaker is turned on.
(Check the primary and secondary voltage of the
INDICATOR
transformer.)
Check the power supply voltage between
(Refer to the name plate.)
2
TERMINAL (Check the primary and secondary voltage of the
BLOCK transformer.)
Check the fluctuating voltage between
(15~60VDC)
3
FUSE
Check to see if the fuse blows out.
3.15A (Check the R04 of the varistor.)
Check the voltage at the No.4 pin on CN13 connector
4
of the infrared receiver.
DC5V
(Check the transformer and the power supply circuit
of the rated voltage.)
Check the voltage at the white lead of the louver
5
motor.
DC12V
(Check the transformer and the power supply circuit
of the rated voltage.)
6
Check the voltage at the No.1 pin on CN10
connector and CN24.
(Check the F01)
(AC 220~240V)
Refer to the service data for the detailed failure
diagnosis.
２ ３
W HI RED
CN23 CN21
LINE
FILTER
R04
3
Fan Motor
Drive circuit
1 2 3
CN11 CN10
1 2 3
1 2 3 4 5
1 2 3 4 5
CN08
1 2 3 4
HA
JEM-A
Diagnosis Result
and
1
2 and 3 .
– 16 –
FILE NO. SVM-07018
INDOOR OUTDOOR
UNIT UNIT
5
Power
CN07
supply circuit
(W HI)
1 1 W HI 1 1
+12 VDC
YEL
2 2 2 2
+5 VDC
YEL
3 3 3 3
YEL
4 4 4 4
YEL
5
5 5 5
LOUVER MOTOR
5 3 1 6
5 3 1
6
6
AC FAN MOTOR
.
2