Logic Input Control Diagram (Fig. 7); Outputs - Information About The Operational Status Of The Equipment - LG KM113.27UU Installation Manual

2. Input terminals
1ST,2ST,3ST"
(voltage free contacts):
no contact closed = no power
request
contact POWER
(terminals 13+15)=low
request (displays shows C1/H1)
contact POWER
(terminals 13+16)=higher power
request (displays shows C4/H4)
both contacts POWER 1ST+2ST
closed (terminals 13+15+16) =
maximum power request (C7/H7)
The power request algorithm requires
at least "C1/H1" code to activate the
equipment (compressor unit).
The power request algorithm requires
at least "C0" / "H0" code to stop the
equipment (compressor unit).
5.3 OUTPUTS – INFORMATION ABOUT THE OPERATIONAL STATUS OF THE
EQUIPMENT
DEFROST
Logic output "DEFROST" (terminals 19+20).
The contact is closed if the equipment is in the "defrost" mode and at the same time the display module shows
an information message "d F"
The contact opens when the defrost mode is completed and when the refrigerant temperature in the heat
exchanger reaches at least 20°C.
During regular operational status the contact is off/open.
ERROR
Logic output "ERROR"(terminals 21+22).
The contact is off/open if the equipment diagnostics identified a defect or the equipment is not powered - no
supply voltage.
The defect code is also shown on the module display using the variable communicated by the MODBUS.
Defects identified by the communication module:
List of error codes of the outdoor unit – see the servicing manual of the applied LG equipment.
If more than one error has occurred at the same time, only the code of the first error is shown on the display.
During regular operational status the contact is on/closed.
Notice:
To restart the device after errors occur, it is NECESSARY to perform a "RESET" of the compressor unit device,
i.e. disconnect the device from the power supply.
2020/07/23
"POWER
– logic inputs
1ST closed
power
2ST closed
Cool / Heat
Power level
0,1,4,7
Stop / Start
Fig.7 – Logic input control diagram
Er .. 2 thermometer error "blue"
Er .. 6 thermometer error "red"
Er .. 99 Modbus communication error
Er .. 5 Communication error with the outdoor unit
Er .. XX outdoor unit errors
I&C
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