LG ARUM080LTE5 Engineering Product Data Book page 759

Multi V 5
8. Electrical Wiring
■ Automatic pipe detection(For Heat Recovery System)
1. Turn No.1 dip switch of SW02E of HR unit PCB off.
2. Confirm that the setting of No.2, 3, 4 of SW02E corresponds with the type of the valve connection.
3. Reset the power of HR unit PCB
4. Master outdoor unit PCB DIP switch on : No.5
5. Select the mode using '▶', '◀' Button : "Idu" Push the '●' button
6. Select the "Id 5" function using '▶', '◀' Button :"Ath" or "Atc" Push the '●' button.
Outdoor temperature is over 15°C(59°F) : "Ath" Using (If it fail, use "Atc")
Outdoor temperature is below 15°C(59°F) : "Atc" Using (If it fail, use "Ath")
7. Select the mode using '▶', '◀' Button : "Idu" Push the '●' button
8. Select the "Id 6" function using '▶', '◀' Button :"StA" Push the '●' button
9. System is operated after "88" is displayed on 7-SEG of the outdoor unit main PCB.
10.Pipe detection process is proceeded.
11.5~30 minutes are required depending on the number of the indoor units and outdoor temperature.
12.The number of the indoor units connected is displayed on 7-SEG of the outdoor unit main PCB for about 1 minute
• For a HR unit, the number of the indoor units connected to each HR unit is displayed.
• '200' is displayed in case of auto pipe detecting error, and auto pipe detection process is completed when
after "88" is disappeared.
CAUTION
• Execute auto addressing and auto pipe detection again whenever the indoor PDB and HR unit PCB is
replaced.
– Operation error occurs unless power is supplied to the indoor and HR units.
• Error No.200 occurs if the number of connected indoor units and that of scanned indoor units are
different.
• If auto pipe detection process fails, complete it with manual pipe detection (see Manual pipe detection
part).
• If auto pipe detection process is completed normally, manual pipe detection is not required.
• If you want to do auto pipe detection again after auto pipe detection fails, do after reset of outdoor unit
by all means.
• During 5 minutes after pipe detection is completed, do not turn off the main unit PCB to save the result
of pipe detection automatically.
48
Installation of Outdoor Units