Control Board - Westinghouse WHU09DHA21S Service Manual

Model: WHU24SZA21S
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.)
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

Control board

Lead wire
color
Compressor
Blue
24 model: 0.75
(
Yellow 20
White
Black
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
- 30 -
)
68 F