3Rd Party Controller - LG Therma V HM091MRS Installation Manual

ACCESSORIES INSTALLATION
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3rd Party Controller

The product can also be linked to 3rd party controller. You can connect external controllers using
Modbus protocol except for LG controller. If 3rd party controller is used, LG controller is not
applied to AWHP simultaneously.
How to install 3 rd party controller
Follow below procedures step 1 ~ step 4.
Step 1. Check if the power of the unit is turned off.
Step 2. Disassemble front panels and distinguish control box(Indoor) of
the unit.
Step 3. Check if the harness(White) is inserted fully to the indoor unit
PCB (CN_COM).
Step 4. Connect the 3rd party controller to terminal block 2(11/12)
completely. (including Meter interface module)
h The terminal block connection number may differ depending on the model. Refer to the
"Wiring Diagram" in the SVC Manual.
CN_COM
Indoor PCB
11 12
1(L) 2(N)
rd
3 PARTY
CONTROLLER
(DC 5 V)
1(L) 2(N)
3 rd PARTY
CONTROOLER
or METER
INTERFACE(LG)