LG MULTI V M ARNU07GTU 4 Series Svc Manual page 24

Function
2) Step 2 : Communication check
- If all model code is displayed in 7 segment communication between Compressor Module is normal.
- If 104* is displayed in 7-segment, check communication wires between Compressor Module and Dip switch
setting.
3) Step 3 : PCB error check
- After 40 s, error check begins.
4) Step 4 : Auto addressing of indoor units
- Auto addressing begins when address(red) button in DISPLAY PCB is pressed for 6 s.
- During auto addressing, 7 segment on DISPLAY PCB displays "88"
- After auto addressing, the number of indoor units is displayed in 7 segment for 30 s. The address of each
indoor unit is displayed on each wired remote controller.
Push address(red) button for 3 s
Auto address starts
Auto address is in progress (max. 15 min.)
The number of indoor units is displayed for 30 s
Auto address process is finished.
Every indoor unit displays its address on
wired remote controller and the 7 segment of
main PCB is off.
n DISPLAY PCB
- 24 -
7 - Segment
SW01D (reset)
SW04C (X : cancel)
DIP-SW01
SW03C (
SW02C (
SW01C (
(10 indoor units found)
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Only training and service purposes.
: forward)
: backward)
: confirm)