Pre-Commissioning; Preparing The Electrical System / Indoor Unit Auto Addressing - LG Multi V Water IV Installation Manual

PRE-COMMISSIONING

Preparing the Electrical System / Indoor Unit Auto Addressing

Prepare the Electrical System
1. Verify correct, clean, specified power is at the line side of each system component's power disconnect switch.
2. Note if the green LED light on the component PCB board is illuminated.
3. 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 that the LED in the center of the disconnect plate is illuminated.
4. If a zone controller is connected to the component, verify the LCD screen displays current operational characteristics.
Indoor Unit Auto Addressing
During this procedure, only a properly-licensed electrician should operate power input disconnect switches. Never look at a disconnect
switch when closing. Turn away from the switch when closing. Incorrect wiring could cause the disconnect to explode, resulting in physical
injury or death.
Upon successful completion of the auto addressing function, an unintentional compressor start can occur unless the communica-
tions cable to the indoor units is removed from the water source unit terminals IDU(A) and IDU(B). Do NOT open the service valves
or attempt to start water source unit compressors until directed by the LG-authorized Commissioning Agent. Major damage to the unit
piping and compressors will occur, and there is a risk of explosion, suffocation, physical injury, and / or death.
Note:
During the pre-commissioning process for Gen. 4 systems, do not change any DIP switch settings except for SW01 switch number 3
which should be ON to enable Gen. 4 features. All other switches should be left in the OFF position on ODU DIP switch SW01. Refer to
"DIP Switch Settings for Generation 4 Equipment" on page 93 for proper setting of DIP switch 3.
Auto Addressing Procedure
Note:
If the Auto Address Procedure is not successful, the compressor(s) will not start when power is applied.
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.
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 only.
5. At the water source unit PCB, verify DIP switch SW01 is set as necessary for your system. Refer to "DIP Switch Settings for Generation 4
Equipment" on page 93.
6. If the LED on the main PCB is not observable from the power disconnect switch location, have a second person cycle power on the water
source unit. Leave input power disconnect in the ON position.
7. Check the water source unit current configuration code(s). Observe the unit setup codes listed in Table 66 on the LED display on the WSU
main PCB. Each code will display for approximately two (2) seconds.
Table 66: Setup Code Display Sequence.
Sequence Code Displayed
1 See Description Capacity of Master WSU in horsepower (HP). Refer to Table 15 through Table 18 for HP values.
2 See Description Capacity of Slave 1 WSU in HP. Refer to Table 15 through Table 18 for HP values.
3 See Description Capacity of Slave 2 WSU in HP. Refer to Table 15 through Table 18 for HP values.
4 See Description Total capacity in HP of all WSUs. Refer to Table 15 through Table 18 for HP values.
5 2 or 3
6 22 or 46
7 1, 2, or 3
94
2 = Heat Pump; 3 = Heat Recovery
22 = 208-230V system; 46 = 460V system
Model type. 1 = General; 2 = Tropical; 3 = Factory
Due to our policy of continuous product innovation, some specifications may change without notification.
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Description