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PRE-COMMISSIONING
Setting the Optional Modes
Night Low Sound Function (Fn3)
The Night Low Sound Function reduces the operating speed of the
outdoor unit fans (according to the input signal) when in cooling
mode. Operating at a low RPM reduces the fan sound levels of the
outdoor unit at night, which usually has a low cooling load.
On a rolling 24 hour basis, an internal timer begins counting hours
after the start time (delay set after peak cooling recorded operation),
switching to restricted fan speed duration operation, following what-
ever settings have been chosen.
For use on both heat pump and heat recovery systems.
Table 48: Setting the Time and Related Sound Level.
Settings
(Delay after Peak Cooling Recorded) (Hour)*
op1
op2
op3
op4
op5
op6
op7
op8
op9
op10 (Default)
op11
op12
*The system measures ambient temperature (minimum and maximum) in "Wait Time" to help determine when the system can start operating in Night Low Sound.
126
Start Time
8.0
6.5
5.0
8.0
6.5
5.0
8.0
6.5
5.0
0.0 (Continuous Operation)
0.0 (Continuous Operation)
0.0 (Continuous Operation)
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.
Setting the Night Low Sound Function.
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
Select the "Fn3" function by using the SW03C forward ►button and
the SW02C backward ◄ button, and then press the SW01C
confirm ● button.
Select from "op1" through "op12" options (see table) by using the
SW03C forward ►button and the SW02C backward ◄ button,
and then press the SW01C confirm ● button.
Press the SW01D Reset Button one (1) time to reset PCB.
The Night Low Sound function is set; the selected option value is
saved in the EPROM.
Restricted Fan Speed Duration
(Hour)
9.0
10.5
12.0
9.0
10.5
12.0
9.0
10.5
12.0
24.0
24.0
24.0
● button.
Approximate Noise Level dB(A)
6 Ton
8 to 20 Ton
55
59
55
59
55
59
52
56
52
56
52
56
49
53
49
53
49
53
55
59
52
56
49
53
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