LG MULTI V M ARNU18GTT 4 Series Manuals

Manuals and User Guides for LG MULTI V M ARNU18GTT 4 Series. We have 1 LG MULTI V M ARNU18GTT 4 Series manual available for free PDF download: Svc Manual

LG MULTI V M ARNU18GTT 4 Series Svc Manual

LG MULTI V M ARNU18GTT 4 Series Svc Manual (91 pages)

Brand: LG | Category: Air Conditioner | Size: 14.58 MB

Table of Contents

Table of Contents

2
- Safety Precautions
  3
Part 1 General Information

7
- 1 Model Names
  
  8
  - Indoor Unit
    8
  - Multi V M
    8
- 2 External Appearance
  
  9
  - Indoor Unit
    9
  - Multi V M
    10
- 3 Nomenclature
  
  11
  - Indoor Unit
    11
  - Multi V M
    11
  - Part 2 MULTI V M
    12
Function

14
- 1 Basic Control
  
  15
  - Compressor Control
    15
  - Normal Operation
    15
  - Master and Slave Unit's EEV Control
    16
- 2 Special Control
  
  17
  - Oil Return Control
    17
  - Defrost Control
    19
  - Self-Diagnosis Function
    19
    
    Stop Operation
    20
- 3 Protection Control
  
  21
  - Pressure Protection Control
    21
  - Discharge Temperature Control
    22
  - Inverter Protection Control
    22
  - Phase Detection
    22
  - Pressure Switch
    22
- 4 Other Control
  
  23
  - Initial Setup
    23
  - Pump down
    26
  - Night Low Noise Function
    27
  - Vacuum Mode
    28
  - Static Pressure Compensation Mode
    28
  - Cool & Heat Selector
    29
  - Cycle Data View
    30
  - Refrigerant Noise Reduction Mode
    31
  - Part 3 PCB Setting and Test Run
    32
  - Part 4 Trouble Shooting Guide
    37
Trouble Shooting Guide

38
- 1 The Phenomena from Main Component Failure
  
  39
- 2 Checking Method for Key Components
  
  40
  - Compressor
    40
  - Fan Motor
    41
  - Electronic Expansion Valve
    42
  - Phase Bridge Diode Checking Method
    45
  - Inverter IPM Checking Method
    46
  - Pressure Sensor(High/Low Pressure Sensor)
    47
  - Outdoor Fan
    47
  - Way Valve
    48
  - Temperature Sensor
    48

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