LG MULTI V M ARNU07GTU 4 Series User Manual

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Copyright © 2018 LG Electronics Inc. All rights reserved.
Only training and service purposes.
Function
3.2 Discharge temperature control
n MULTI V M control
SC : Sub Cooling, SH : Super Heating
3.3 Inverter protection control
n ARUN050LMS0
- Cooling mode
- Heating mode
3.4 Phase detection
n If the power lines are connected incorrectly the product will not work and displays error like below.
Case 1) 1 or more phase lines are omitting (disconnected)
Case 2) Neutral (N) line connected wrongly to any phase line
3.5 Pressure switch
- Main has pressure sensing switch in series between compressor and power relay.
- The state of pressure sensing switch is normally on. It has small electric current from 220V AC. Never touch the
connecting terminal with hand nor short two wires directly.
Temperature Range Compressor Sub cooling EEV IDU EEV
Tdis ≥ 115 ℃ OFF Min. pulse Min. pulse
Tdis ≥ 110 ℃ -5Hz/10 s
SC_SH decrease control SH decrease control
Tdis ≥ 108 ℃ -5Hz/30 s
108 ℃ > Tdis ≥ 105 ℃ no increase
105 ℃ > Tdis ≥ 100 ℃ +3Hz or less
Tdis < 100 ℃ Normal control
Normal Operation Frequency Down System stop
AC input Current 20 and less 20 or Over 29
Compressor Current 10 and less 10 or Over 12
Normal Operation Frequency Down System stop
AC input Current 20 and less 20 or Over 29
Compressor Current 11 and less 11 or Over 13
Case
Terminal block
Error No.
R S T N
Missed Phase
X
50
X
X 05
X
50
(when Fan Motor
operating)

LG MULTI V M ARNU07GTU 4 Series Specifications

General

Brand	LG
Model	MULTI V M ARNU07GTU 4 Series
Category	Air Conditioner
Language	English