LG R410A Service Manual page 102

Function
2) Step 2 : PCB error check
- After 40 sec, error check begins.
- All errors of units including sub units are displayed in 7 segment.
- If communication with the inverter fan PCB and that with the inverter
compressor PCB are normal, 2 LED's on the main PCB are blink.
LED01k represents the communication state with the inverter compressor PCB.
LED02k represents the communication state with the inverter fan PCB.
3) Step 3 : Auto addressing of indoor units
- Auto addressing begins when address(red) button in Main PCB is pressed for 6 sec.
- During auto addressing, 7 segment on main PCB displays "88"
- After auto addressing, the number of indoor units is displayed in 7 segment for 30 sec. The address of each
indoor unit is displayed on each wired remote controller.
Push address(red) button for 6 sec.
Auto address starts
Auto address is in progress (max. 15 min.)
The number of indoor units is displayed for 30 sec.
Auto address process is finished.
Every indoor unit displays its address on
wired remote controller and the 7 segment of
main PCB is off.
102 Outdoor Unit
1 2 3 4 5 6 7 8
(35 indoor units found)
(6 sec.)