LG ARUM072BTE5 Installation Manual page 148

PRE-COMMISSIONING
Addressing with Heat Recovery Units
Auto Addressing for Pipe Detection
Auto addressing for pipe detection function sets the connection relationship automatically between the indoor units and the heat recovery
units.
1. Turn No.1 of SW02M on the heat recovery unit PCB to OFF.
2. Confirm that the setting of Nos. 2, 3 of SW02M corresponds with the number ports used.
3. Reset the power of heat recovery unit PCB.
Turn master outdoor unit PCB No. 5 DIP switch to ON.
4. Select the "Idu" mode using ► and ◄, then push the ● button.
5. Select the "Id 5" "Ath" or "Atc" function using ► and ◄, then push the ● button. If outdoor temperature is >59°F, use "Ath". If that does
not work, use "Atc."If outdoor temperature is <59°F, use "Atc". If that does not work, use "Ath."
Atc = "At-cold outside", and Ath = "At-hot outside". Select accordingly.
6. Select the "Idu" mode using ► and ◄, then push the ● button.
7. Select the "Id 6 StA" function using ► and ◄, then push the ● button.
8. The number "88" should display on the SSD of the outdoor unit main PCB.
9. The automatic pipe detection procedure starts.
10. The procedure may run from five (5) to sixty (60) minutes, depending on the number of connected indoor units, and the ambient outdoor
temperature.
11. The number of indoor units detected is displayed for thirty (30) seconds to one (1) minute on the outdoor unit PCB after the outdoor unit
stops.
• The number of indoor units connected to each heat recovery unit will be displayed.
• If there is an auto pipe detection error, "200" will be displayed.
• If there are no auto pipe detection errors, the number "88" displays on the SSD of the outdoor unit main PCB. After "88" disappears, the
auto detection error is complete.
• Run the auto addressing and auto pipe detection procedures again whenever an indoor unit PCB and / or and heat recovery unit PCB are
replaced. Apply power to the indoor units and heat recovery units after the repair is complete, otherwise operation errors will occur.
• Error No. 200 occurs if the number of actual connected indoor units and the number of detected indoor units are different.
• If the auto pipe detection procedure fails, perform the manual pipe detection procedure. (If the auto pipe detection procedure is successful,
the manual pipe detection procedure is not required.
• The auto pipe detection procedure can be run again after a failed auto pipe detection procedure attempt; just reset the outdoor unit first.
• Do not turn off the main unit PCB for at least five (5) minutes after the auto pipe detection procedure is complete; allow time for the
outdoor unit to automatically save auto pipe detection results.
148
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.