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Table 36: NK Frame Wiring Diagram Legend.
Terminal
CN-POWER
CN-MOTOR1
CN-VM
CN_OUT
CN-DAMPER
CN-ZONE
CN-EXT
CN-EEV
CN-OPTION
CN-DISPLAY
CN-PTC
CN-CC
CN-LEAK
CN-FLOAT
CN-PIPE-OUT
CN-WF
CN-HUMID
CN-AIRC
CN-PIPE-IN
CN-ROOM
CN-REMO
CN-D-PUMP
CN-485
Table 37: NK Frame DIP Switch Settings.
DIP Switch Setting
SW3
GROUP CONTROL
DRY CONTACT
SW4
MODE
SW5
CONTINUOUS FAN
SW6 HEATER INTERLOCK
*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
Water IV, Multi V S Engineering Manuals for additional information.
Purpose
AC Power supply
Fan motor output
Sub PC power supply
Heater
N / A
Zone controller
External ON / OFF controller
EEV Output
Optional PCB EPROM
Display
Auxiliary heater
Dry contact
Refrigerant leak detector
Float switch input
Discharge pipe sensor
Wi-Fi
N / A
N / A
Suction pipe sensor
Room sensor
Wired remote controller
Drain pump output
Communication
Off
On
Master
Slave
Variable
Auto
Off
On
Off
On
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.
Vertical Air Handler NK Chassis
Function
AC Power line
Motor output of BLDC
Power supply connection
Connection for heater
N / A
Zone controller connection
External ON / OFF controller connection
EEV control output
Option PCB connection
Display of indoor status
Auxiliary heater connection
Dry Contact connection
Refrigerant leak detector connection
Float switch sensing
Pipe out thermistor
Wi-Fi module connection
N / A
N / A
Pipe in thermistor
Room air thermistor
Wired remote control connection
AC output for drain pump
Connection between indoor and outdoor units
Group control setting using 7-Day Programmable Controller; selects Master /
Slave on each indoor unit
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
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 outdoor
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
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)
WIRING
Remarks
73
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