LG ARUM072BTE5 Installation Manual page 130

PRE-COMMISSIONING
Setting the Optional Modes
High Efficiency Function Cooling
Operation (Auto Dust Mode) (Fn11)
High Efficiency Function (Auto Dust Mode) attempts to remove sand
/ debris that may have collected on the outdoor unit coil. After the
cooling, heating, etc., mode is satisfied, this function will start the fan
motors, operating them at full speed and in the reverse direction. Air
is drawn in through the top of the outdoor unit, and passes through
the coil to help dislodge any loose debris.
The op3 setting requires an LG I / O Module to be installed in the
master outdoor unit. If a binary signal is sent to the outdoor unit via
a third party source, normal VRF system operation can be interrupt-
ed, and the Auto Dust Throw function can be performed. All other
settings will not interrupt the Multi V system operation
Use on both heat pump and heat recovery systems.
The Auto Dust Mode function is not a substitute for coil cleaning and
does not clear the coil of all debris. A coil cleaning procedure should be
included when performing regular preventative maintenance.
Table 53: Setting the High Efficiency Function (Auto Dust Mode).
Settings
Off (Default)
op1
op2
op3*
op4
op5
*op3 requires LG's I / O Module.
130
Reverse Cycle Fan
Runtime (Minutes)
-
5
5
3
1
1
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Setting the High Efficiency Function (Auto Dust Mode).
Turn No. 5 on the master outdoor unit PCB
DIP switch bank SW01 to ON.
Select the "Func" mode by using the SW03C forward ►button and
the SW02C backward ◄ button, and then press the SW01C
confirm ● button.
Select the "Fn11" function by using the SW03C forward ►button and
the SW02C backward ◄ button, and then press the SW01C
confirm ● button.
Select from "oFF", "op1" through "op5" options (see table) options by
using the SW03C forward ►button and the SW02C backward
◄ button, and then press the SW01C confirm ● button.
The High Efficiency Function in Cooling Operation (Auto Dust Throw)
is set. PCB does not need reset.
Time Delay Between Cycles
-
2 Hours
2 Hours
5 Minutes Following
Compressor Shutdown
-
1 Hour
Number of Cycles
-
No Limit
2
1
1
2