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68
Multi V Ducted Indoor Units
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING
Vertical Air Handler NJ Chassis
Table 35: NJ Frame Wiring Diagram Legend.
Table 36: NJ Frame DIP Switch Settings.
Terminal Purpose Function
CN-POWER AC Power supply AC Power line
CN-MOTOR1 Fan motor output Motor output of BLDC
RV-VM Sub PC power supply Power supply connection
CN_OUT Heater Connection for heater
CN-FLOAT Float switch input Float switch sensing
CN-ZONE Zone controller Zone controller connection
CN-EEV EEV Output EEV control output
CN-OPTION Optional PCB EPROM Option PCB connection
CN-EXT
External ON / OFF controller External ON / OFF controller connection
CN-DISPLAY Display Display of indoor status
CN-CC Dry contact Dry Contact connection
CN-PTC
Auxiliary heater Auxiliary heater connection
CN-PIPE/OUT (RD) Discharge pipe sensor Pipe out thermistor
CN-LEAK (VI) Refrigerant leak detector Refrigerant leak detector connection
CN-PIPE/IN (WH) Suction pipe sensor Pipe in thermistor
CN-REMO (GN) Wired remote controller Wired remote control connection
CN-ROOM (YL) Room sensor Room air thermistor
CN-D/PUMP Drain pump output AC output for drain pump
CN-485 Communication Connection between indoor and outdoor units
*For Gen 4 Multi V vertical air handler indoor units, DIP switches 1, 2, 7 and 8 must be set to OFF. These DIP switches are
used for other models.
**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Wa-
ter IV, Multi V S Engineering Manual for additional information.
DIP Switch Setting Off On Remarks
SW3
GROUP CONTROL Master Slave
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
SW4
DRY CONTACT
MODE
Variable Auto
Sets operation mode for optional Dry Contact accessory
1. Variable: Auto or Manual Mode can be set through 7-Day Programmable
Controller or Wireless Remote Controller (factory default setting is Auto if
there is no setting)
2. Auto: For Dry Contact, it is always Auto mode
SW5
CONTINUOUS FAN Off On
Selects continuous fan for ducted indoor units.
1. On: Indoor unit fan will always operate at a set fan speed, except when
the system is off, or the outdoor unit is in defrost mode (when the oudoor unit
is in defrost mode, the fan will operate at super low fan speed)
2. Off: Indoor unit fan speed can be changed by on / off
SW6
HEATER INTERLOCK Off On
Selects heater interlock function for vertical air handler units
1. On: Automatic (heater will automatically operate during heating mode)
2. Off: Manual (heater needs to be manually turned on during heating mode)
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