2020/07/23 page 9
CONNECTION OF REFRIGERANT TEMPERATURE SENSORS TO THE MODULE
Connect the temperature sensors TEMP1 and TEMP2 to the relevant terminals on the module. Sensor IN, blue
(refrigerant temperature in front of the exchanger) connect to terminals TEMP1 (terminals no.10+11).
Sensor OUT, red (refrigerant temperature behind the exchanger) connect to terminals TEMP2 (terminals no.
12+13).
Follow the colour coding of the sensors and wires
–
white wire to white terminal! Sensors are standardly
supplied with a cable length 3 m.
Notice:
When the temperature sensor is connected incorrectly or is defective the safety function of the communication
module is activated and the system generates corresponding error message (see the list of error messages of
the applied LG unit).
Sensors with longer cable length on request.
4.5 CONNECTION TO AN OUTDOOR COMPRESSOR UNIT
Connect a suitable power cable between the power terminals of the outdoor compressor unit (see the diagram
of the given unit) and the “supply” terminals in the communication box –
terminal block no. 1-L, 2-N, PE.
Connect suitable (shielded) communication cable between the outdoor compressor unit
(terminals “IDU“) a
nd
“OUT COMM” box terminals –
terminal block X1, no. 3 (A) +4 (B).
Attention, the polarity must be followed (marked A, B).
4.6 MOV-MV POWER LIMITATION MODULE CONNECTION (ACCESSORIES)
Make sure that the compressor unit is without voltage!
There is a risk of electric shock and damage to the device when installing the module under voltage!
Compressor unit accepts the module only when the power supply is activated. Before connecting the
power limitation module, address the system first!
Connect a suitable (shielded) communication cable between the terminals of the MOV-MV power limitation
module and the “POWER COM” terminals no. 29 + 30.
Attention, the polarity (colour of the terminals) must be followed.
Install the MOV-MV power limitation module in the outdoor compressor unit - the module plugs into the
connector on the PCB of the outdoor unit (example for the ARUN
–
LTE4 series outdoor unit).
ATTENTION, the orientation of the module in relation to the connector must be observed - see the
MOV-MV module manual
.
