LG Multi V CRUN Series

System
SERVICE MANUAL
System
Heat Pump Air Conditioner
SERVICE MANUAL
LG
MODELS: CRUN/CRNN Series
website http://www.lgservice.com
e-mail http://www.lgeservice.com/techsup.html
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

LG Multi V CRUN Series Specifications

General

Type	VRF (Variable Refrigerant Flow)
Refrigerant	R410A
Compressor Type	Inverter Scroll Compressor
Indoor Unit Options	Ceiling Cassette, Wall Mounted
Control System	Centralized Control Options

Summary

Safety Precautions

Safety Symbols and Meanings

Explains the meaning of safety symbols used throughout the manual.

Cautions Before Installation

Covers warnings and precautions to follow before installing the unit.

Electrical Work and Movement Cautions

Details safety guidelines for electrical work and unit handling.

Test Run Cautions

Lists critical safety measures before operating the unit.

Indoor Unit Types

CRNN-TC Ceiling Mounted Cassette (1 Way)

Technical details for CRNN-TC 1-way cassette units.

CRNN-TETD Ceiling Mounted Cassette (4 Way)

Technical details for CRNN-TE/TD 4-way cassette units.

CRNN-BHBGBE Concealed Duct (High Static)

Technical details for high static concealed duct units.

CRNN-BNBJ Concealed Duct (Low Static)

CRNN-VB Convertible Type

CRNN-SR CRNN-ST Wall Mounted Type

CRNN-SU Art Cool Type (Mirror)

CRNN-SP Art Cool Type

CRNN-SV Art Cool Type (Wide)

CRNN-CAACBACCACDA Floor Standing Type

CRUN Series Outdoor Units

Specifications

Function

Operation Details

Control Devices and Function

1.1 Wired Remote Control

1.2 Wireless Remote Control

1.3 Simple Central Control

2. Deluxe Central Control

Introduction to the deluxe central control system.

Installation

Transmission Cable Specifications

Separation of Transmission and Power Lines

Installation Procedures

Indoor Unit Addressing

Explains automatic addressing for indoor units.

Group Number Setting for Indoor Units

Troubleshooting Guide

Component Failures and Diagnosis

Lists common failures, causes, and troubleshooting methods.

Key Component Checking Methods

Detailed checks for compressor, LEV, bridge diode, IPM.

Self-Diagnosis Function

Explains error codes and self-diagnosis procedures.