Models: Whm48Sza21S And Whm60Sza21S - Westinghouse WHM24DMA21S Design & Technical Manual

5-2. Models: WHM48SZA21S and WHM60SZA21S

Power terminal panel
L1 BRN
BLU
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.)
5-2. Models: WHM48SZA21S and WHM60SZA21S
X6
X2
BLU
Nout2
LIN
X5
BRN
Lout
X3
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 X15
Base heater HEAT-L HEAT-N H-PRESS L-PRESS
High Low
Base heater Crankcase heater
pressure pressure
switch switch
Function of terminal
Revolution pulse output
Speed control voltage input
Control power voltage input
GND
Motor power voltage input
0 32 F 20 68 F
15 k 6.5 k
1.3 V 2.2 V
15 k 6.5 k
1.3 V 2.2 V
187 k 72.1 k
0.18 V 0.43 V
15 k 6.5 k
1.3 V 2.2 V
IPM BOARD
CN12 NIN
CN11 LIN
CN17
CN8
CN9
DC FAN1 DC FAN2
L1 L2
INDUCTOR
M
DC FAN1 MOTOR DC FAN2 MOTOR
X24 X4
Pressure sensor SV
Main Control Board
X19 X17 X20 X18
HEAT-PRO DISS SUC OUTDOOR
Superheat Discharge Suction Ambient
protection sensor sensor sensor
switch
Lead wire
color
Blue
Compressor
Yellow
48 model: 0.63
White
60 model: 0.63
Black
(
20 68 F
Red
30 86 F
4.5 k
2.7 V
4.5 k
2.7 V
46.5 k
0.64 V
4.5 k
2.7 V
- 28 -
CN18 CN16 CN15 CN14 CN5 CN6
FAN2 FAN1 SI U V
RED WHI BLU
M
M
COMPRESSOR YLW/GRN
X22 X21 X13
FAN2 FAN1 IPM-SI
X23 X11
COIL DEF VALVE
M
Coil Defrost
Electronic expansion valve
sensor sensor
)
5. Wiring diagrams
CN7
W