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Prepare the Electrical System
Verify correct, clean, specified power is at the line side of each system component's disconnect.
1. Note if the green LED light on the component PCB board is illuminated.
2. If a Dynamic V-8 VL air cleaner is installed on a high static ducted model indoor unit, verify power has been provided to the air cleaner
controller. Verify by observing the LED in the center of the disconnect plate is illuminated.
3. If a zone controller (Remote Unit controller on the Hydro Kit) is connected to the component, verify the LCD screen displays current
operational characteristics.
Indoor Unit Auto Addressing
Disconnects should only be operated by a properly licensed electrician at this time. Never look at a disconnect switch when closing. Turn away
from the switch when closing. Incorrect wiring could cause the disconnect to explode, physical injury, and / or death.
Note:
During the pre-commissioning process, do not change any DIP switch settings. All switches should be left in the OFF position on both DIP
switches SW01B and SW02B.
Initiate the Auto Addressing Procedure
Note:
If the Auto Address Procedure has never been successfully completed for the water source system, the compressor(s) will not start when power
is applied to the unit.
1. Verify all that all indoor units connected to the system have power to the PCB board AND all zone controller system start buttons are OFF.
2. Remove the maintenance access panel and unit control box cover from the water source unit. Place panels and screws in a secure area.
3. Verify the communications cable between the indoor units and the water source unit is terminated at the water source unit terminals
IDU(A) and IDU (B).
4. Verify the shield on the communications cable is grounded at the water source unit.
5. At the water source unit PCB, verify all DIP switches are "OFF" on DIP switches SW01B and SW02B.
6. Cycle power on the water source unit. Leave disconnect in the "ON" position.
7. Check the water source unit current configuration code(s). Observe the unit setup codes using the LED display found on the water source
units PCB. Each code will display for two (2) seconds.
Table 29: Code Display Sequence.
Sequence
Code
1
-
2
-
3
2
4
25
(If the DIP switch is not set correctly, this
5
136
Note:
While this routine runs, the unit runs a self-diagnostics check. At completion, the LED should be clear and nothing displayed. Diagnostic
process should take from three (3) to seven (7) minutes.
Preparing the Electrical System / Indoor Unit Auto Addressing
Description
Model code
Total capacity in horsepower
Heat pump model
Normal mode display
number is not displayed.)
Model type (Water Mini)
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.
PRE-COMMISSIONING
Table 30: Water Mini Unit Model Identification Codes.
Capacity
Model Code
(Horsepower / Tons)
120
4 / 3.0
121
5 / 4.0
122
6 / 4.4
Power Supply
Refrigerant
1Ø, 208/230V
R410A
63
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