103
PCB Settings
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After the self-diagnostics check is complete, the SSD is clear with nothing displayed. Diagnostic process takes from three (3) to seven (7) minutes.
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. The shields must be tied together and taped back.
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” 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.
• Supply power to the indoor units. If power is not supplied, an operation error will occur.
• See Error No. CH200 will appear when the auto addressing procedure has failed. See the Troubleshooting section for information on how to
resolve Error No. CH200.
• During the pre-commissioning process for systems with Gen 4 indoor units,
do not change any DIP switch settings except for No. 3 on
SW01B, which must be ON to enable Gen. 4 features. All other combinations of switches (one [1] through seven [7]) must be left in the OFF
position on the outdoor unit DIP switch bank 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.
Disconnects must only be operated by a properly licensed electrician at this time.
Never look at a disconnect switch when closing. Turn away
from the switch when closing. Incorrect wiring could cause the disconnect to explode, physical injury, and / or death.
Indoor Unit Auto Addressing Procedure
WARNING
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 must 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.
INDOOR UNIT ADDRESSING
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