LG ARUV Series Service Manual page 203

Comp. combination during oil return control
Before 70sec.
1unit(half size) minimum Hz
1 unit 50 Hz
minimum Hz
2 unit
minimum Hz +
3 unit
constant comp.1
minimum Hz : temp. out excess -5°C: 30Hz
temp. out below -5°C : 40Hz
2.2 Defrost
Starting Condition
Starting defrost control if one case of bellowing cases is satisfied
[1] 1-UNIT Model
a) air temp. ≥ 0°C : hex pipe temp. < -7°C
b) -5°C < air temp. < 0°C : hex pipe temp. < (air temp.-8°C)
c) air temp. ≤ -5°C : hex pipe temp. < (air temp. -11°C)
[2] 2 & 3 UNITS Model
1) Partly defrost
When there is one or more bellowing cases of hex pipe temp. as each unit
a) air temp. ≥ 0°C : hex pipe temp. < -10°C
b) air temp. < 0°C : hex pipe temp. < (air temp.-11°C)
2) All defrost
When all hex pipe temp. is satisfied bellowing cases
a) air temp. ≥ 0°C : hex pipe temp. < -7°C
b) -5°C < air temp. < 0°C : hex pipe temp. < (air temp._8°C)
c) air temp. ≤ -5°C : hex pipe temp. < (air temp. -9°C)
Component
Inv Compressor
Sub unit
compressor
Fan
Main EEV
4 way valve
Subcooling EEV
Hot gas bypass
valve
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Only for training and service purposes
Pressure limit
after 70sec.
60 Hz
80 Hz
45 Hz +
constant comp.1 constant comp.1
45 Hz +
constant comp.2 constant comp.2
Starting
Min. frequency
All off
High pressure
0 Hz
Full open
On off
min.
On
Normal
Before 70sec. after 70sec.
50 Hz 80 Hz
60 Hz +
60 Hz
constant comp.1
minimum Hz + 60 Hz +
constant comp.2
minimum Hz + 60 Hz +
constant comp.3
Running
60 Hz
On
High pressure
control
Full open Base pulse
Off
min.
On
- 203 -
Ending
30 Hz
Off
control
On
min.
On
LGE Internal Use Only
Function