Lennox VRF VMDB Series, Installation Instruction

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20
EXV
FM
ALARM
PUMP
CN18 CN3
CN24
CN2
EARTH
Y/G
CN15 CN9
CN17
Y/G
L1 L2
CN51
CN50
CN1
HHE interface
( Current range:
0-1A)
(Voltage range:
0-24V AC/DC)
FAN CTON HTON AUXH
T2A
T2B
T2
T1
XS5 XP5
Display Board
RED BLUE
N=5
YELLOW
GRAY
WHITE
BLUE
ON/OFF
SWITCH
Occupancy
sensor
Main Board
CS
POWER IN
XT1
XT2
CN21
CN26 CN4
CN5
CN54
CN52 CN8
T2A
T2B
T2
EXV
Warning lamp
Electronic expansion valve
ALARM
Indoor fan motor
Room temperature sensor
T1
FM
Code Title
XS1-7
XP1-7
XT1-2
Connectors
Terminals
Pump motor
Water level switch
Swing motors
PUMP
GM1-2
CS
Error Code
Error Content
E1
E0
E2
E3
E4
Mode conflict
Communication error between
indoor and main outdoor unit
E5
FE
D8
A0
Eb
U4
Ed
EE
F8
No address
Outdoor unit fault
Water level alarm
Emergency stop
Remote OFF
E6 DC fan motor error
E7 EEPROM failure error
“ +5V GND +12V ”
ONLY USED
FOR TESTING
CN30
RED
BLACK
HA
HB
12V
COM
Q
P
Magnet
Ring
To wired
controller
comm. bus
To outdoor/
indoor/MS
units
comm
.
bus
To wired
controller
power
MS error
CN14
GM1 GM2
XP6
XP4
XP3
XP2
XP1
BLUE
BLACK
WHITE RED
XS4
XS3
XS2
XS1
XS6
XP7
XS7
CN12
NOTE:
1. Refer to manual for communication
wiring
2. Please use the 2-conductor shielded
twisted cable for communication
NOTE:
Component in dash line is
optional or field wiring
Inlet of evaporator sensor
Outlet of evaporator sensor
Middle of evaporator sensor
T1(Room temperature sensor) malfunction
T2(Middle of evaporator sensor) malfunction
T2A(Inlet of evaporator sensor) malfunction
T2B(Outlet of evaporator sensor) malfunction
MS self-inspection error
EXV malfunction
Figure 31. Typical Wiring Connections
CN4
18 AWG stranded shielded cable
White plug
White wire
Black wire
Black wire
Thermistor
Solder or connect with V0SNSR00P
Figure 30. Identify T1 Sensor on Wiring Diagram
Typical wiring diagram. Refer to wiring diagram on the unit for actual wiring.
Setting Blower Operation
Blower cycling can be configured to determine indoor
operation.
• Default operation is indoor unit blower OFF when the
indoor unit is in thermo OFF.
• Settings can be adjusted in the -3P controller and
cannot be configured at the indoor unit PCB.
• Consult the specific controller manual for detailed
blower setting information.
NOTE - Ensure the blower is set to the ON position when
using an electrical duct heater.