LG Multi V Water II Outdoor Unit Service Manual (ARWN / ARWB Series PDF)

Description

LG Multi V Water II Outdoor Unit Service Manual (ARWN / ARWB Series PDF) DOWNLOAD

LG Multi V Water II Outdoor Unit Service Manual – Factory Technical Guide

This is the official LG Electronics Service Manual for Multi V Water II VRF Outdoor Units using R410A refrigerant. It is designed strictly for authorized service personnel and provides in-depth factory procedures for installation support, system control, diagnostics, PCB configuration, and field repair.

The manual applies to ARWN (Heat Pump) and ARWB (Heat Recovery) series outdoor units ranging from 8HP to 60HP, including 208/230V and 460V three-phase systems.

It is an indispensable reference for HVAC engineers, VRF specialists, and service centers working on LG Multi V commercial systems.

📑 What’s Inside This Manual

🔐 Safety & Service Guidelines

• Installation and electrical safety rules

• Refrigerant handling (R410A)

• Fire, shock & explosion prevention

• Transport, grounding & environmental precautions

📘 General Information

• Model naming structure

• System architecture

• Indoor & outdoor unit overview

• External appearance diagrams

• Unit combination tables

• Nomenclature decoding (ARWN / ARWB / PRHR series)

🧩 Supported Models (Excerpt)

• ARWN Series (Heat Pump)

  • ARWN072BA2, ARWN144BA2, ARWN216BA2, ARWN288BA2

  • ARWN360BA2, ARWN432BA2, ARWN480DA2, ARWN580DA2

• ARWB Series (Heat Recovery)

  • ARWB072BA2, ARWB144BA2, ARWB216BA2, ARWB288BA2

  • ARWB360BA2, ARWB432BA2, ARWB480DA2, ARWB580DA2

⚙️ Outdoor Unit Functions

• Basic control logic

• Compressor control (inverter & constant speed)

• Fuzzy control for Te / Tc

• Master & Slave EEV control

• Oil return control (cooling & heating)

• Stopping operation sequences

• Protection controls:

  • High/Low pressure

  • Discharge temperature

  • Inverter protection

  • Liquid back prevention

  • Phase detection

  • Pressure switch logic

🧠 Advanced Control Features

• Initial setup sequences

• Communication checks

• PCB error diagnostics

• Auto-addressing of indoor units

• Emergency operation modes

• Auto backup (inverter & constant speed compressor)

• Vacuum mode

• Static pressure compensation

• Black Box error data logging

🧪 PCB Setting & Test Run

• Pre-test inspection checklist

• Insulation resistance testing

• Crankcase heater preheat rules

• DIP switch locations

• SW01B / SW02B configuration tables

• Long pipe mode, COP mode, forced oil return

• Vacuum mode and solenoid valve functions

🔧 Compressor Replacement Procedure

Step-by-step factory method for:

• Refrigerant recovery

• Brazing removal

• Compressor extraction

• Reinstallation & torque values

• Vacuum drying

• Refrigerant recharging

• Functional verification

🛠 Troubleshooting Guide

• Component failure symptoms

• Compressor diagnostics

• Electronic Expansion Valve (EEV) testing

• Inverter IPM checking

• Bridge diode testing

• Self-diagnosis functions

• Error code logic for indoor & outdoor units

📂 File Details

This is the same technical reference used by LG-trained service engineers. It gives you factory-level control over diagnostics, PCB configuration, compressor replacement, and fault resolution—saving costly service calls and minimizing system downtime.

👉 Download instantly and service LG Multi V Water II systems with complete confidence and precision.