(Overall) Defrost Function (Fn4); Outdoor Unit Addressing Function - LG Multi V5 Service Manual

(Overall) Defrost Function (Fn4)

Overall Defrost Function allows the outdoor unit to operate in either
full frame / full coil (overall) defrost or in full system defrost. When
selected, the Intelligent Defrost algorithm can no longer choose
split-coil or partial frame (in multi-frame systems) defrost. System
pressure, outdoor unit coil temperatures, and outdoor ambient tem-
peratures (and humidity if Fn16 - Humidity Reference) will determine
when the defrost cycle initiates.
Use in locations where relative humidity remains high during the
heating season, or in applications where it has been proven that
operating all of the outdoor units in defrost at the same time saves
energy, and / or shortens the defrost time without impacting comfort
levels.
Can also be used with Fn6 - Rapid Defrost, SE6 - Forced Defrost,
Fn22 - Overall Defrost Operating in Low Temperatures (Heating),
and Fn16 - Humidity Reference.
For use on both heat pump and heat recovery systems.
Table 26: Setting the Overall Defrost Function.
Options
System Operates in Partial-Coil Defrost
oFF (Default)
(or Partial Frame Defrost in Multi-Frame Systems)
on System Operates in Full Frame (Overall) Defrost Only

Outdoor Unit Addressing Function

(Fn5)
Use this function to set addresses when more than one Multi V
system shares a communications bus linked to a central controller
or BMS gateway. Each system is assigned to a unique outdoor
unit address. The Outdoor Unit Addressing Function will help avoid
assigning the same address to the different systems; if not properly
addressed, a communication error could occur on one (1) or more of
the systems.
For use on both heat pump and heat recovery systems.
• 000 = Default; Central Control Address setting of "000".
• 001 = Central Control Address setting of "001".
• Set 1 of 255 Valid Addresses; 000, 001, 002, 003, 004...through
254.
• The central controller or BMS gateway must be installed first before
setting the outdoor unit address.
• A trained LG service provider must set this function during system
installation.
Function
Due to our policy of continuous product innovation, some specifications may change without notification.
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OTHER CONTROLS
Figure 14: Setting the Overall Function.
Turn No. 5 on the master outdoor unit PCB
DIP switch bank SW01 to ON.
Select from "on" through "oFF" options (see table) by using the
Defrost Mode is set. PCB does not need reset.
A trained LG service provider must set this function during system
installation.
Figure 15: Setting the Outdoor Unit Address Function.
Turn No. 5 on the master outdoor unit PCB DIP
switch bank SW01 to ON.
Select from 0 (Default) through 254 by using the SW03C forward
Outdoor Unit Address is set. PCB does not need reset.
Setting Optional Modes
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