
3-2. Model: WHS24WMA21S
OPTIONAL
OPTIONAL
OPTIONAL
ROOM TEMP
WIRING CONTROL UNIT
OR WIFI
HEAT EXCHANGER
RED
RED
PIPE TEMP
DISPLAY UNIT
MOTOR
MOTOR
CONTROL UNIT
INDOOR
UNIT
LOUVER
MOTOR
OUTDOOR
UNIT
F
A
N
M
O
T
O
R
Thermistor
( Pipe temp. )
15 k
6.5 k
4.5 k
1.3 V
2.2 V
2.7 V
20
30
0
68 F
F
86 F
32
Temperature
Thermistor
( Room temp. )
15 k
6.5 k
4.5 k
1.3 V
2.2 V
2.7 V
Fan motor
1
2
3
4
5
7
6
Pin No. Terminal
code
Vm
GND
Vcc
Vsp
FG
Function of terminal
Revolution pulse output
Speed control voltage input
Control power voltage input
GND
Motor power voltage input
Lead wire
color
Blue
White
Black
Yellow
Red
- 9 -
3-2. Model: WHS24WMA21S
3. Wiring diagrams
W
A
LL
MO
U
N
TED
W
H
S0
9-3
0W
MA
W
A
LL
MO
U
N
TED
W
H
S0
9-3
0W
MA