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OUTDOOR TECHNICAL OVERVIEW
B-19
ENGLISH
Topic TitleWiring Diagrams
2U20EH2VHA
GR
1 2 3 4 5 678
SW3
SW4
SW2
SW1
CN12
LP
HP
CN13
CN9
GND
CN11
CON8
CN8
CN5
W
TO Module
M
LED_G
LED_R
CN6
4-WAY VALVE
DC-FAN
MOTOR
M
250VAC T5A
FUSE
CON9
FG
Vsp
Vcc
CN25
CN16
ACN
ACL
ON
4321
ON
W
W
Vdc
L1 L2
Power
CN2
CN23
CN21
SW6
SW5
W
W
B
B
COMPRESSOR
Y
M
CN17
R
M
CN15
CRANKCASE HEATER
Definition of SW6
1
2
3
4
OFF
OFF
OFF
OFF
OFF
OFF OFFON
ON
ON
ON ON
Centralized Control
Address=1
Address=2
Address=16
---------------
---- ---- ---- ----
Definition of SW1
SW1-1
SW1-2
SW1-3
SW1-4
Normal Operating(Default)
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON OFF
Force Heating
Force Cooling
Rated Operating
To Indoor
Unit B
2
1
3
OR: Orange B: Black BL: Blue GR:Green R: Red
Y/G: Yellow/Green W: White Y: Yellow BR: Brown
E.E.V:Electro expansion valve
LP/HP:Low /high pressure switch
Toci: Outdoor Condensing inlet Temp. sensor
Tc: Outdoor Condensing Temperature Sensor
Ts: Compressor Suction Temp. Sensor
Ta: Ambient Temp. Sensor
Td: Compressor Discharge Temp. Sensor
Te: Defrosting Temp. Sensor
Tm: Module Temp. Sensor
Tc1(a/b/c/d/e):Condensing Temp. Sensor
for Indoor Units a/b/c/d/e (Gas Pipe)
Tc2(a/b/c/d/e):Condensing Temp. Sensor
for Indoor Units a/b/c/d/e (Liquid Pipe)
R
P2(N)
F30A 250VAC
FUSE
P1(L)
RL1
P7
P6
P5
P4
P3
W
B
ON
4321
CN2
CN3
CN1
CN4
SW1
4321
5
1 2 3 4 5 678
ON
SW7
W
W
B
B
0150530741
To Indoor
Unit A
2
1
3
R
C2
C1
A
B
To central
Controller
OFF
OFF
ON
OFF
Time Defrost Valid
3
4
CN1
R
BR
R
BL
OR
Y
W
R
BL
OR
Y
W
R
BL
OR
Y
W
R
R
W
W
B
W
B
W
W
W
R
W
W
W
BL Y W
B
R
R
B
W
2U20EH2VHA
SW5
1
3
4 5
6
7
8
ON
SW7
1
2
3
4 5
6
7
8
ON
Default setting
of SW5 & SW7
BR
G
G
G
G
G
G
G
Y/G
Y/G
Y/G
Y/G
W
U
R
V
B
W
+
-
BR
BL
Electrolytic
Capacitor
Reactor
U
V
W
ACN
RI
N(-)
P(+)
ACL
RO
CN15
Tm
CN8
B
W
W
GR
B
OR
OR
W
CN11
R
R
W
CN2
R
CN34
R
CN4
GR
BL BL
R
GRAY
OR
OR
Base Pan Heater
Tc
CN14
CN1 CN24
Ts
Ta
Td
Te
BA BA
TC1
TC2
Toci
CN7
W
B
W
CN17
BL
R
2
E.E.V-O
E.E.V-A
E.E.V-B
*
The dashed part is optional.
R
Inverter Power
Module
MAINCONTROLBOARD
POWER
FILTER
BOARD
PMV-RE PMV-A
PMV-B
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