Westinghouse WHM24DMA21S Service Manual page 29

Models: WHM48SZA21S and WHM60SZA21S
Power terminal panel
L1
L2
YLW/GRN
USE COPPER SUPPLY WIRES
Connection terminal panel
C
BLU
B
RED
WHT
Y
BLK
W
YLW
SI
Fan motor
Pin No. Terminal
code
1 FG
2 Vsp
Vcc
3
4
GND
5
6 Vm
Temperature
Thermistor
(Outdoor temp.)
Thermistor
(Coil & Defrost temp.)
Thermistor
(Discharge temp.)
Thermistor
(Suction temp.)
X6
X2
Nout2
BRN
LIN
X5
Lout
X3
BLU
NIN
FILTER
X4
BOARD
EARTH
X1 PTC
X7 X8
Lout1 Nout1
YLW/GRN
X7 X1
PTC Power
X12 SI
X8 H
X3 X6 X5 X16
Base heater HEAT-L HEAT-N H-PRESS
High
Base heater Crankcase heater
pressure
switch
Function of terminal
Revolution pulse output
Speed control voltage input
Control power voltage input
GND
Motor power voltage input
0 32 F 20
15 k 6.5 k
1.3 V
15 k 6.5 k
1.3 V
187 k 72.1 k
0.18 V 0.43 V
15 k 6.5 k
1.3 V
BLU CN12 NIN
BRN
CN11 LIN
CN8 CN9
L1 L2
INDUCTOR
DC FAN1 MOTOR DC FAN2 MOTOR
X24 X4
Pressure sensor SV
Main Control Board
X15 X19 X17
L-PRESS HEAT-PRO DISS
Low Superheat Discharge
pressure protection sensor
switch switch
Lead wire
color
Blue
Compressor
Yellow
48 model: 0.63
White
60 model: 0.63
Black
(
Red
68 F 30 86 F
4.5 k
2.2 V 2.7 V
4.5 k
2.2 V 2.7 V
46.5 k
0.64 V
4.5 k
2.2 V 2.7 V
- 28 -
IPM BOARD
CN17 CN18 CN16 CN15
DC FAN1 DC FAN2 FAN2 FAN1
M M
X22 X21
FAN2 FAN1
X20 X18 X23
SUC OUTDOOR COIL DEF
Suction Ambient Coil Defrost
sensor sensor sensor sensor
)
20 68 F
CN14 CN5 CN6 CN7
SI U V W
RED WHI BLU
M
COMPRESSOR YLW/GRN
X13
IPM-SI
X11
VALVE
M
Electronic expansion valve