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Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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)RXU:D\7574)UDPHV
WIRING
Table 19: TR / TQ Frame Wiring Diagram Legend.
Table 20: TR / TQ Frame DIP Switch Settings.
*For Gen 4 Multi V four-way ceiling cassette indoor units, DIP switches 1, 2, 5, 6, and 8 must be set to OFF. These DIP switch-
es 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 5, Multi V IV,
Multi V Water 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
SW7
VENTILATOR
INTERLOCK
Off
On
Selects ventilator interlock function for four-way ceiling cassette indoor units.
1. On: Automatic (vent relay will be turned on after ten [10] seconds
of indoor unit operation
2. Off: Manual (ventilator needs to be set through the controller)
Terminal
Purpose
Function
CN_MOTOR1
Fan motor output
Motor output of BLDC
CN_WF
Wi-Fi module
Wi-Fi module connection
CN-PTC
Auxiliary heater
Auxiliary heater connection
CN_DUST
N/A
N/A
CN_FLOAT
Float switch input
Float switch sensing
CN_EEV
EEV output
EEV control output
CN_DISPLAY
Display
Display of indoor status
CN_OPTION
Option PCB (EEPROM)
Option PCB connection
CN_ROOM
Room sensor
Room air thermistor
CN_PIPE_IN
Suction pipe sensor
Pipe in thermistor
CN_HUMID
N/A
N/A
CN_LEAK
Leak sensor
Leak sensor connection
CN_PIPE_OUT
Discharge pipe sensor
Pipe out thermistor
CN_EXT
External on/off controller
External on/off controller connection
CN_CC
Dry Contact
Connection to Dry Contact (Optional)
CN_AIRC*
Air cleaner
Air cleaner control
CN_VANE2
Step Motor
Step motor output
CN_VANE1
Step Motor
Step motor output
CN_DCDRAIN
Drain pump output
AC output for drain pump
CN_485
Communication
Connection between indoor and outdoor units
CN_COMM
Communication
Connection on Sub PCB between indoor and outdoor units
CN_REMO
Remote controller
Remote control connection
CN_POWER
AC Power supply
AC power line input for indoor controller
*If a Third-Party Dry Contact and an LG internal heater or an LG Auxiliary Heater Kit is installed, supplemental heat capability cannot be controlled by the Third-Party Thermostat.