Schematic Diagram
13
(4)Model:GWHD(28)NK3BO
22BU
21BN
PE
PE
PE
12YEGN
10BU
11BN
1BN
BK
BU
BN
N(1)
L
2
3
N
BU
BN
14YE
13BU
15RD
16YEGN
18WH
3
2
N(1)
BN
BU
BK
BK
BU
BN
N(1)
2
3
YEGN
3
2
N(1)
BN
BU
BK
N
L
YEGN
YEGN
YEGN
2BN
3BN
4BN
5BU
6BU
7BU
8BU
9YEGN
BK
GY
WH
RD
PE
17WH
PE
PE
L
L5
X1
PE
E(PE)
N1
N1
POWER
YEGN
C1
AC-L2
AC-L1
AP2
N2
U
W
V
FAN MOTOR
INDOOR UNIT
D
M
AP1: Main Board
PE
SAT
COMP.
INDOOR UNIT
C
INDOOR UNIT
A
INDOOR UNIT
B
4YV
than 30V to prevent the risk of electrical shock!
of terminal P(DC+) and N(DC-) at AP1 is higher
Please don't touch any terminal when the voltage
WARNING
0
0
0
0
0
0
0
0
0
0
0
L
FILTER
N LINE
LOAD
L2
L1
L3
L4
L'
N'
RD
YE
BU
LX2-2
LX2-1
YE
RD
BK
WH
BU
BN
BU
N1
TEM.SENSOR
Liquid Valve
TEM.SENSOR
Gas Valve
Gas Valve
TEM.SENSOR
Liquid Valve
TEM.SENSOR
TEM.SENSOR
Liquid Valve
TEM.SENSOR
Gas Valve
4V
WH
OG
LX1-2
LX1-1
HP
WH
BU
BK
RD
BN
W
U
V
OVC-COMP
20YE
19BU
COM-INNER
YEGN
YE
OFAN
HPP
AC-L
N2
FD
FD
FC
FC
FB
FA
FA
FB
5
5
EKV
TEM.SENSOR
EXHAUST
TEM.SENSOR
OUTROOM
TEM.SENSOR
OUTTUBE
RT3
RT2
RT1
T-SENSOR
WH
RD
TUBE-A
RT5
RT4
Gas Valve
TEM.SENSOR
Liquid Valve
TEM.SENSOR
BK
BK
RT6
RT7
TUBE-B
RD
BK
RD
RD
TUBE-C
RT9
RT8
BK
BK
RT10
RT11
TUBE-D
RD
YE
EKV
5
5
5
5
EKV
EKV
5
5
BU
23RD
24RD
HEAT-C
COMP
HEATER
P
XTA
XT1
XTB
XTC
XTD