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LG Multi V Service Manual
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Piping Diagrams
- 45
-
Copyright © 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
Piping Diagrams
s
s
s
s
s
s
s
s
s
s
s
s
s
Low pressure gas pipe
Liquid pipe
High pressure gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
s
Solenoid
EEV
Sensor
A
B
C
D
1. HR Unit
Ⓐ
: To be switched operation between cooling and heating by two Solenoid valve
Ⓑ
: To be used decreasing noise according to sub-cooling of inlet and outlet of indoor unit
(Simultaneous operation)
Ⓒ
: To prevent liquid charging between high pressure gas valve and HR unit at cooling mode
Ⓓ
: To be controlled the pressure between high and low pressure pipe during operation switching
PRHR042A
44
46
Table of Contents
Table of Contents
2
Safety Precautions
3
Part 1 General Information
8
Model Names
9
External Appearance
11
Nomenclature
13
Part 2 Outdoor Units
15
Function
17
1 Basic Control
18
Compressor Control
18
Normal Operation
18
EEV Control
19
2 Special Control
20
Oil Return Control
20
Defrost
22
Stop Operation
23
3 Protection Control
24
Pressure Protection Control
24
Discharge Temperature Control
25
Inverter Protection Control
25
Phase Detection
25
4 Other Control
26
Initial Setup
26
Pump down
29
Night Low Noise Function
30
Vacuum Mode
31
Static Pressure Compensation Mode
31
Cycle Data View
32
Refrigerant Noise Reduction Mode
33
Snow Removal & Rapid Defrost
34
Cool & Heat Selector (Only Heatpump)
35
Part 3 HR Units
36
Hr Units
37
Specifications
38
Parts Functions
40
Dimensions
42
Piping Diagrams
45
Wiring Diagrams
47
Functions
52
Part 4 PCB Setting and Test Run
54
Pcb Setting and Test Run
55
Unit PCB (PRHR**2A, ** : 04, 03, 02)
56
Switch for Setup of HR Unit
56
Automatic Addressing
61
Flow Chart for Chart for Auto-Addressing of Indoor and HR Unit
62
Example of Manual Valve Addressing(Non-Zoning Setting)
65
Example of Manual Valve Addressing (Zoning Setting)
66
Example of Checking Valve Address
67
Identification of Manual Valve ID (Address)
67
Method of Checking the Pipe Detection Result at Outdoor Unit
67
Unit PCB (PRHR**3A, ** : 08, 06, 04, 03, 02)
67
Switch for Setup of HR Unit
69
Automatic Addressing
76
Flow Chart for Chart for Auto-Addressing of Indoor and HR Unit
77
Example of Manual Valve Addressing(Non-Zoning Setting)
80
Example of Manual Valve Addressing(Zoning Setting)
81
Example of Checking Valve Address
82
Identification of Manual Valve ID (Address)
82
Test Run
83
Checks before Test Run
83
How to Cope with Test Run Abnormality
84
Dip Switch Setting
85
Checking the Setting of Outdoor Units
86
Part 5 Trouble Shooting Guide
87
Trouble Shooting Guide
88
1 The Phenomena from Main Component Failure
89
2 Checking Method for Key Components
90
Compressor
90
Fan Motor
91
Electronic Expansion Valve
92
Inverter IGBTM Checking Method
95
Pressure Sensor(High/Low Pressure Sensor)
96
Outdoor Fan
96
Way Valve
97
Temperature Sensor
98
Fan Lock and Fan IPM Check
98
3 Self-Diagnosis Function
100
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Installation Manual
113 pages
Owner's Manual
17 pages
5
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LG Multi V Specifications
General
Brand
LG
Model
Multi V
Category
Air Conditioner
Language
English
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