LG ARUV Series Service Manual page 288

Troubleshooting Guide
Auto-addressing of valves flow chart
Check that No.1 S/W of SW02M on HR unit PCB is
turned off
Check that No.2 and 3 of SW02M on HR unit PCB
corresponds to HR unit model (No.4 ~ No.8 Off)
Turn on the power of outdoor unit, HR unit and
indoor unit
Wait for 3 minute
Press SW02M of outdoor unit main PCB for 5
seconds
'88' is displayed on outdoor unit main PCB and HR
unit PCB
After about 5 minutes, the number of indoor units in
communication are displayed on outdoor unit main
PCB for 30 seconds
Are the number
of indoor units connected to the outdoor unit
wiring and displayed one(N1)
equal?
Are the number
displayed with H after 30 seconds and
that of HR units Installed
equal?
'88' is displayed on the outdoor unit main PCB
Outdoor unit runs in heating mode for about 2~7
minutes
The number of indoor units found is displayed on
the outdoor unit main PCB for 30 seconds after the
outdoor unit stops
Are the number of
indoor units connected to the outdoor unit
piping and displayed one(N2)
equal?
End of auto-addressing
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Only for training and service purposes
No
Yes
No
Yes
No
Yes
CAUTION:
- Auto-addressing may not be normally completed accord-
ing to installing situation and ambient temperature.
In this case, manually address the valves of the HR unit.
- The number of indoor units found by an HR unit is dis-
played on 7-SEG of the HR unit for 30 seconds when the
outdoor unit is turned off after auto-addressing.
- When auto-addressing is completed successfully, N1 and
N2 displayed on 7-SEG of the outdoor unit should be
equal.
- Auto-addressing is not applicable in case of valve group
control.
If you want to do automatic addressing again after auto-
matic addressing fails, wait more than 10 minutes.
(Do automatic addressing after pipes are cool down suffi-
ciently.)
Immediately turn off the power of outdoor, HR and
indoor units
Check power and communication wiring between
outdoor, HR and indoor units
Retry auto-addressing after checking trouble
Incompletion of auto-addressing
Addressing error 200 occurs after 30 seconds
Check the piping between outdoor, HR and indoor
units
Retry auto-addressing after checking trouble
Incompletion of auto-addressing
- 288 -
LGE Internal Use Only