17
Figure 18. VOSB036H43, VOSB048H43, & VOSB054H43
Typical Wiring Diagram
Typical wiring diagram. Refer to wiring diagram on the unit for actual wiring.
T2A
Outlet of evaporator sensor
Inlet of evaporator sensor
T2B
Indoor fan motor
Inlet air temperature sensor
T0
FM
Code
Title
XS1-5
XP1-5 Connectors
Connectors
Main Board
CN3 CN18
CN24
CN11 CN5
CN52
CN54
CN12
CN15
CN9
CN26
CN8
EARTH
PUMP
EEV
CS
( Current range: 0-1A)
( Voltage range: 0-24V AC/DC)
ON/OFF
SWITCH
CN14
ALARM
POWER IN
LACKB
DE
R
XT1
L1 L2
G
/
Y
CN2{L_IN}
CN4{N_IN}
CN6
CN20
SVD
T2
TA
DC motor
drive board
CN13
CN3
“ +5V GND +12V ”
ONLY USED
FOR TESTING
To wired
controller
comm. bus
To outdoor/
indoor/MS
units
comm
.
bus
YELLOW
GRAY
WHITE
BLUE
XT2
RED
BLACK
HA
HB
12V
COM
Q
P
CN30
Middle of evaporator sensor
EEV
Terminals
Pump motor
Water level switch
Warning lamp
Electronic expansion valve
XT1-2
PUMP
CS
ALARM
SVD Solenoid valve
Code
Title
T2B
E
U
L
B
T2A
WHITE
T1/T0
RED
ACK
L
B
TA
C
A
L
B
K
T2
Outlet air temperature sensor
To wired
controller
power
Display Board
NOTE:
Component in dash line is optional or field wiring
Error code
Error Content
E0
E1
E2
E4
E5
Mode conflict
Communication error between indoor and main outdoor unit
T0 (Inlet air temperature sensor) malfunction
TA (Outlet air temperature sensor) malfunction
T2B (Outlet of evaporator sensor) malfunction
T2A (Inlet of evaporator sensor) malfunction
Error Content
Error code
FE
Eb
U4
Ed
EE
F8
No address
EEV malfunction
MS self-inspection error
Outdoor unit fault
High water alarm
MS error
E6
DC fan motor error
E7
EC
EEPROM failure
E3
T2 (Middle of evaporator sensor) malfunction
D8
A0
Remote off
Emergency stop
NOTE:
1. Refer to manual for
communication wiring
2. Please use the 2-conductor
shielded twisted cable for
communication
XP1
XP2
XP3
XS1
XS2
XS3
XP4
XS4
XP5
XS5
N=3
N=4
HHE interface
FAN CTON HTON 4 5 6
CN50
FM
FAN
CO2
sensor
Vco2
COM
7
8
GND
Vco2
