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ARWN038GA2
LG ARWN038GA2 Service Manual
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SERVICE MANUAL R410A
MODEL : WATER MINI Series
CAUTION
Before Servicing the units, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com
R410A
2
Table of Contents
Table of Contents
2
Safety Precautions
3
Part 1 General Information
10
Model Names
11
External Appearance
11
Nomenclature
12
Part 2 Outside Units
13
Function
15
1 Basic Control
16
Compressor Control
16
Normal Operation
16
Master and Slave Unit's EEV Control
17
Indoor Unit
18
Stopping Operation
20
2 Special Control
18
Oil Return Control
18
3 Protection Control
21
Pressure Protection Control
21
Discharge Temperature Control
22
Inverter Protection Control
22
Liquid Back Control
23
Pressure Switch
23
4 Other Control
24
Initial Setup
24
Vacuum Mode
26
Black Box Function
27
Test Run
28
Part 3 Test Run
29
Dip Switch Setting
31
Part 4 Trouble Shooting Guide
34
Trouble Shooting Guide
35
1 The Phenomena from Main Component Failure
36
2 Checking Method for Key Components
37
Compressor
37
Electronic Expansion Valve
38
Inverter IPM Checking Method
41
Other
42
3 Self-Diagnosis Function
43
Troubleshooting Guide
46
Other manuals for LG ARWN038GA2
Installation Operation & Maintenance
92 pages
4
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LG ARWN038GA2 Specifications
General
Cooling Capacity
3.8 kW
Heating Capacity
4.0 kW
Cooling Capacity (BTU/h)
13000 BTU/h
Heating Capacity (BTU/h)
13600 BTU/h
Voltage (V)
220-240 V
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