LG ARNU21GL3G2 Manuals

Manuals and User Guides for LG ARNU21GL3G2. We have 3 LG ARNU21GL3G2 manuals available for free PDF download: Service Manual, Installation Manual

LG ARNU21GL3G2 Service Manual

LG ARNU21GL3G2 Service Manual (138 pages)

Brand: LG | Category: Air Conditioner | Size: 13 MB

Table of Contents

Table of Contents

2
- Safety Precautions
  3
Part 1 General Information

8
- 1 Model Names
  
  9
  - Indoor Unit
    9
  - Outdoor Unit
    10
- 2 External Appearance
  
  11
  - Indoor Unit
    11
  - Outdoor Unit
    12
- 3 Combination of Outdoor Units
  
  13
- 4 Nomenclature
  
  14
  - Indoor Unit
    14
  - Outdoor Unit
    14
- Part 2 Outdoor Units
  
  15
Function

17
- 1 Basic Control
  
  18
  - Normal Operation
    18
  - Compressor Control
    18
  - Master and Slave Unit's EEV Control
    19
- 2 Special Control
  
  20
  - Oil Return Control
    20
  - Partial Defrost
    23
  - Oil Equalizing Control
    24
- 3 Protection Control
  
  25
  - Pressure Protection Control
    25
  - Discharge Temperature Control
    26
  - Inverter Protection Control
    26
  - Phase Detection
    27
  - Pressure Switch
    27
- 4 Other Control
  
  28
  - Initial Setup
    28
  - Emergency Operation
    31
  - Refrigerant Auto Charging
    33
  - Refrigerant Amount Automatic Judgment
    35
  - Itr(Cooling)
    36
  - Itr(Heating)
    37
  - FDD Code
    39
  - Multi V ITR Result Report
    40
  - Pump down
    41
  - Pump out
    42
  - Auto Back up Function_Inverter Compressor
    44
  - Night Low Noise Function
    45
  - Vacuum Mode
    46
  - Static Pressure Compensation Mode
    46
  - Cool & Heat Selector
    47
- Part 3 PCB Setting and Test Run
  
  49
- Part 4 Trouble Shooting Guide
  
  54
Trouble Shooting Guide

55
- 1 The Phenomena from Main Component Failure
  
  56
- 2 Checking Method for Key Components
  
  57
  - Compressor
    57
  - Fan Motor
    58
  - Electronic Expansion Valve
    59
  - Phase Bridge Diode Checking Method
    62
  - Inverter IPM Checking Method
    63
  - Fan IPM Checking Method(UX3 Chassis)
    64
  - Fan IPM Checking Method(UX2 Chassis)
    65
  - Pressure Sensor(High/Low Pressure Sensor)
    66
  - Outdoor Fan
    66
  - Solenoid Valve
    67
  - Reverse Valve
    68
  - Temperature Sensor
    68
  - Others
    69
- 3 Self-Diagnosis Function
  
  70

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LG ARNU21GL3G2 Service Manual

LG ARNU21GL3G2 Service Manual (95 pages)

Brand: LG | Category: Air Conditioner | Size: 11 MB

Table of Contents

Table of Contents

2
- Safety Precautions
  3
Part 1 General Information

8
- Indoor Unit
  9
- Model Names
  9
- Outside Unit
  10
- External Appearance
  11
- Indoor Unit
  11
- Outside Unit
  12
- Combination of Outside Units
  13
- Indoor Unit
  14
- Nomenclature
  14
- Outside Unit
  14
- Part 2 Outside Units
  15
Function

16
- Basic Control
  17
- Compressor Control
  17
- Normal Operation
  17
- Master and Slave Unit's EEV Control
  18
- Oil Return Control
  19
- Special Control
  19
- Oil Equalizing Control
  21
- Stop Operation
  21
- Pressure Protection Control
  22
- Protection Control
  22
- Discharge Temperature Control
  23
- Inverter Protection Control
  23
- Phase Detection
  24
- Pressure Switch
  24
- Initial Setup
  25
- Other Control
  25
- Cool & Heat Selector
  28
- Geothermal Mode
  29
- 220 V out for Solenoid Valve
  30
- Variable Water Flow Control
  31
- Outside Unit Adress
  32
- Using a Sump Heater
  33
- Vacum Mode
  34
- Forced Oil Return
  35
- Refrigerant Noise Reduction Mode
  36
- Cycle Data View
  37
- Part 3 PCB Setting and Test Run
  38
- Part 4 Trouble Shooting Guide
  43
Trouble Shooting Guide

44
- The Phenomena from Main Component Failure
  45
- Checking Method for Key Components
  46
- Compressor
  46
- Electronic Expansion Valve
  47
- Phase Bridge Diode Checking Method
  50
- Inverter IPM/IGBT Checking Method
  51
- Outdoor Fan
  52
- Pressure Sensor(High/Low Pressure Sensor)
  52
- Solenoid Valve
  53
- Reverse Valve
  54
- Temperature Sensor
  54
- Others
  55
- Self-Diagnosis Function
  56

LG ARNU21GL3G2 Installation Manual

LG ARNU21GL3G2 Installation Manual (23 pages)

Brand: LG | Category: Air Conditioner | Size: 2 MB

Table of Contents

Table of Contents
2
Installation Parts

3
Safety Precautions

4
Installation

7
- Selection of the Best Location
  7
- Ceiling Opening Dimension and Hanging Bolt Location
  8
- Indoor Unit Installation
  9
- Wiring Connection
  9
- Part Name and Functions
  11
- Checking the Drainage
  12
- Drain Piping
  13
- Dip Switch Setting
  15
- Group Control Setting
  16
- E.S.P Table
  21

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