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3rd Party Controller
The product can also be linked to 3rd party controller using Modbus RTU. Various datapoints and
setting options are available through Modbus protocol. Contact your authorized dealer for more
information.
How to wire 3rd 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_MODBUS).
Step 4. Connect the 3rd party controller to terminal block 2(21/22) completely.
Indoor PCB
NOTE
• If CN_MODBUS port is used to interlink with LG metering module, a 3rd-party controller
cannot be connected at the same time.
ACCESSORIES INSTALLATION
CN_MODBUS
79
TB 2
21
22
A
B
rd
3
PARTY
CONTROLLER
(DC 5 V)
A
B
rd
3
PARTY
CONTROLLER
or METER
INTERFACE(LG)
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