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Installation Instructions
2/3 ton
Outdoor U nit-
POWER
L1
L2
G
Thermostat
Code
Name
C
24V common
R
24V AC power supply
W1
Defrosting signal
4-way valve control
signal,energized under
B
the heating mode
Compressor control
Y
signal
G
Fan
Outdoor unit
XT1
POWER
L 1 L1
L1
L2
L2
AP 1 N
L2
接 地
接 地
XT 2
G
C
R
Thermostat
W 1
B
Y
Code
Name
C
24V common
R
24V AC power supply
W1
Defrosting signal
4-way valve control
signal,energized under
B
the heating mode
Compressor control
Y
signal
Fan
G
①Only applicable for the unit
：
Note
whose motor is with earthing wire
18
Wiring Diagram
AUH2436ZGDA
XT1
L2
W1
L1
L2
W2
L2
L7
W3
G
θ
EKV1
EKV2
XT2
G
FA
FA1
W10
C
W11
R
W12
W1
JUMP
W13
B
W14
Y
4WAY
DC_MOTOR1
M1
4YV
Note:1. Jumper cap needs to be connected if
2. ①Only applicable for the unit with iron shell motor
G
①
L
Symbol
AP4
COMP
AP1 L1
AP2
M1
AP1
AP3
AP2
AP3
M 1
XT1 XT2
AP4
XT1~XT2
EH1
COMP
EH2
L1
Electric Component Position Map
L
AUH4860ZGDA
1
2
3
G
RT 1 RT 2 RT 3
20K
EKV1
EKV2
θ
θ
θ
θ
5
5
FA
FA1
16
T_SENSOR
2
T_LAC
17
18
COM - MANUAL
19
20
DC - MOTOR
1
DC - MOTOR
2
4WAY
VA
5
5
M 1
M 2
YV 1
YV 2
G
G
①
AC-L
AP1
AC-N
W4
E1
L-OUT N-OUT
G
RT1 RT2 RT3
20k
15K
50K
RD
W7
θ
θ
EH2
EH1
L1
BK
X1
X2
T_SENSOR2
HEAT_TIE_B
HEAT_TIE_C
PWR1
AP3
COMM1
T_LAC
H-PRESS
VA
LPP
HPP
W23
W24
W20
W21
θ
3
P
P
LP
HP
20K
2YV
RT
SP
the re is a jumper cap on unit
' S main board .
.
Name
Symbol
Name
Compressor
HPP
High Pressure Switch
Fan Motor
H-PRESS
High Pressure Sensor
Filter Board
4YV
4-Way Valve
Drive Board
EKV1/EKV2
Electronic expansion valve coil 1/2
Control Board
LPP
Low Pressure Switch
Connection Board
2YV
Electromagnetic Valve
Wiring Board
RT1
Defrosting Temp.Sensor
Compressor Band Heater
RT2
Environment Temp.Sensor
Bottom Band Heater
RT3
Discharge Temp.Sensor
Inductance
RT
Speed Adjustment Temp.Sensor
PFC Inductor
L2-L7
Magnet Ring
DC - BUS
AC-L
L-OUT1
AP1
N
N-OUT1
L-OUT N-OUT
HP
LP
4
5
SP
P
P
21
22 23
24
3
N
X1
X2
H - PRESS
HPP
LPP
10
4
COMM
1
AP3
JUMP
11
2
PWR 1
HEAT _ TIE_C
HEAT _ TIE_B
U
26
27
EH 4
12
1
2
XT 3
U
D 102
D 102
D 101
EH 3
EH 1
EH 2
D 101
D 101
D 102
Electric box
W5
W6
AC-L N
AP4
L6
W8
PWR1 PWR2
PWR
W9
2
3
AP2
W22
COMM
4
U
V
W
L1-2 L2-2
YE
L5
L5
L5
W16 W17 W18
W
V
COMP
3～
W19
G
Code
Name
20K
Speed adjustment temperature sensor
AP1
Filter board
AP2
Drive board
AP3
Main control board
COMP
Compressor
EH1
Electric heating belt 1 of compressor
EH2
Electric heating belt 2 of compressor
EH3
Electric heating belt 3 of compressor
EH4
Electric heating belt of chassis
EKV1
Electronic expansion valve 1
EKV2
Electronic expansion valve 2
HP
High pressure switch
L
Inductor
8
6
7
9
LP
Low pressure switch
M1
Upper fan
M2
Lower fan
RT1
Defrosting temperature sensor
RT2
Ambient temperature sensor
AC-L
RT3
Discharge temperature sensor
SP
High pressure sensor
DC - BUS
XT1~XT3 Wiring board
YV1
4-way valve
COMM
YV2
Solenoid valve
Component layout
AP2
PWR
AP2
L
V
W
L1-1 L1-2 L2-1 L2-2
M1
13
14
BN WH YE
BU
AP3
XT1 XT2
V
W
COMP
L
M2
3～
15
G
25
G
G
Radiator
L2-1 L1-1
BN
WH BU
L3
L4
L4
L3
U
L
AP1
XT 3
31-5000483 Rev. 3
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