Auto Addressing The Indoor Units - LG Multi V ARUN053GF2 Installation Manual

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Auto Addressing the Indoor Units

1. Verify all that all indoor units connected to the system have power
to the PCB board AND all zone controller system start buttons are
OFF. Verify the number of indoor units connected to the system.
2. Verify the communications cable between the indoor units and the
Space II unit is terminated at the Space II unit terminals IDU(A)
and IDU(B).
3. Verify the shield on the communications cable is grounded at the
Space II unit.
4. At the Space II unit PCB, verify all DIP switches are "OFF" on DIP
switches SW01B and SW02B.
5. Cycle power on the Space II unit and indoor units. Wait for three
(3) minutes.
6. Press and hold red Auto Address Button (SW02V) for about five (5) seconds. Release when "88" appears on the LED. After three (3) to
seven (7) minutes, the display will flash a number for about thirty (30) seconds indicating how many indoor units the system
successfully communicated with.
7. If the auto addressing procedure was successful, this number should match the known installed number of indoor units.
8. Upon completion of the auto addressing routine, the address of each indoor unit is indicated on the wired remote control display window
(CH01, CH02, CH03...CH06 indicates number of connected indoor units).
9. Upon successful completion of the auto address procedure, record the system address assigned to each indoor unit by the auto address
procedure in the column provided on the Pre-commissioning Device Configuration Worksheet.
• While this routine runs, the unit runs a self-diagnostics check. At completion, the LED should be clear and nothing displayed. Diagnostic
process should take from three (3) to seven (7) minutes.
• The auto addressing procedure must be performed again after an indoor unit PCB is replaced.
• If power is not applied to the indoor unit, an auto addressing error occurs.
• Auto addressing is only possible on the main PCB of the Space II unit.
• To improve communication, wait three (3) minutes after the power has been cycled on, then perform the auto addressing procedure.
Upon successful completion of the auto addressing function, an unintentional compressor start can occur unless the communications cable
to the indoor units is removed from the Space II unit terminals IDU(A) and IDU(B). Do NOT open the service valves or attempt to start water
source unit compressors or until directed by the Commissioning Agent. Major damage to the unit piping and compressors will occur, and
there is a risk of explosion, suffocation, physical injury, and / or death.
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Figure 59: Space II Unit Main PCB - Auto Addressing.
Main PCB
SW01B SW02B
LED
SW02V
(Auto Addressing)