Indoor Unit Auto Addressing - LG ARUM072BTE5 Installation Manual

PRE-COMMISSIONING

Indoor Unit Auto Addressing

Indoor Unit Auto Addressing Procedure
WARNING
Disconnects should only be operated by a properly licensed electrician at this time.
from the switch when closing. Incorrect wiring could cause the disconnect to explode, physical injury, and / or death.
• Supply power to the indoor units. If power is not supplied, an operation error will occur.
• During the pre-commissioning process for systems with Gen 4 indoor units,
SW01B, which should be ON to enable Gen. 4 features. All other combinations of switches (one [1] through seven [7]) should be left in the
OFF position on the outdoor unit DIP switch bank SW01B. Refer to System Combinations and Outdoor Unit Operation Settings for proper
setting of No. 3 on SW01B.
• If the Auto Address Procedure has never been successfully completed for the system, the compressor(s) will not start when power is applied
to the unit.
• Auto addressing is only possible on the main PCB of the outdoor unit (master unit if dual / triple frame system).
• If an indoor unit PCB has been replaced, the auto addressing procedure must be performed again.
1. Verify all that all indoor units connected to the system have power to the PCB board AND all wired controller system start buttons are OFF.
2. Remove the maintenance access panel and unit control box cover from the outdoor unit. Place panels and screws in a secure area.
3. Verify that the communications cable between the indoor units and the outdoor unit is terminated at the outdoor unit terminals IDU(A) and
IDU (B).
4. Verify the shield on the communications cable is grounded at the outdoor unit.
5. If installing a dual- or triple-frame system, verify which outdoor unit will be the "Master" unit, the Slave1 unit, and the Slave2 unit; check if
the DIP switches on DIP-SW01 are set properly. (See "Setting Outdoor Units in Dual / Triple Frame Systems" under "Pre-Commissioning /
Outdoor Unit DIP Switch Settings" earlier in this section.)
6. Cycle power on the outdoor units, indoor units, etc., and wait three (3) minutes while the outdoor unit sequences through the self-diagnos-
tics check, and to improve indoor unit communication when initial power is supplied. Leave disconnect in the "ON" position.
7. Check the outdoor unit(s) current configuration code(s). Observe the unit setup codes using the SSD display found on the outdoor units
PCB.
After the self-diagnostics check is complete, the SSD should be clear and nothing displayed. Diagnostic process should take from three (3) to seven
(7) minutes.
8. Know how many indoor units are connected to the system.
9. Press and hold the red SW01C button for about five (5) seconds. Release when "88" appears on the SSD of the master outdoor unit PCB.
After three (3) to seven (7) minutes, the display will flash a number for about thirty (30) seconds, indicating how many total indoor units
the system successfully communicated with.
10. This number should match the known installed number of indoor units if the auto addressing procedure was successful. If using LGMV,
read the address of each indoor unit. The address of each indoor unit is also indicated on wired remote control displays.
11. Upon completion of the auto addressing routine, the display will be blank and the system will be in standby waiting for another command.
12. 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.
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Never look at a disconnect switch when closing. Turn away
do not change any DIP switch settings except for No. 3 on