LG Dry Contact Module - 2 Contact Points 5V & 12V from Indoor PCB Installation - Manual (Page 16)

Setting and using method
16 Dry Contact for setback
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When Indoor unit is operating as Cooling Thermal On Mode Relay output is closed.
5. Indoor unit monitoring
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Monitoring operation and error status : Refer to below and
connect to the control device that you want to control.
1) Turn Off the 2 nd switch of SETTING_SW.
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Cooling, Thermal On Mode and Occupancy output : This relay
output Is for interlocking with economizer.
1) Turn ON the 2 nd switch of SETTING_SW.
Operation Display Error Display
Local Supply
(Depends on Operation
display power type)
Power
AC or DC
Local Supply
(Depends on Error
display power type)
Power
AC or DC
SETTING_SW
Economizer
Cooling Thermal On Mode
SETTING_SW