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LG RCAW User Manual

LG RCAW
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Operation & Maintenance Manual
LG
MODELS: RCAW - Compact (50Hz)
website http://www.lgservice.com
IMPORTANT
• Please read this Operation & Maintenance Manual
completely before Operating & Maintenance the product.
• Operating & Maintenance must be performed in
accordance with the national wiring standards by
authorized personnel only.
• Please retain this Operating & Maintenance for future
reference after reading it thoroughly.
R134a
Chiller
Air-cooled Screw
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LG RCAW Specifications

General IconGeneral
BrandLG
ModelRCAW
CategoryChiller
LanguageEnglish

Summary

Safety Considerations

Safety Warnings and Symbols

Explains warning/caution symbols and their meanings for safe operation.

General Safety Precautions

Covers essential safety guidelines for installation, operation, and maintenance to prevent hazards.

General Information

HMI Unit Operation Guide

Guides users on manipulating the Human Machine Interface (HMI) unit for operation.

Menu Navigation and Settings

Details navigation through menus like Main Menu, User Setting, I/O Display, Alarm, System, and Parameter.

Delay Setting Configuration

Configures control sequence and alarm determination delays for chiller operation.

Controls Overview

PLC and HMI Unit Components

Introduces the PLC and HMI components, keys, and display for chiller control.

Control Menu Structure and LEDs

Outlines the control menu structure and the indication status of LEDs for system monitoring.

PLC Configuration and Communication

Explains PLC DIP switches, MODBUS configuration, and register map for communication.

Connector Pinouts and Wiring

Details connector locations, pinouts, and RTD/MODBUS connections for wiring.

Machine On/Off Control Modes

Describes Hand Mode and Auto Mode for turning the machine on and off.

Start-Up Procedures

Pre Start-Up Checklist

Lists critical checks to perform before attempting to start the chiller.

Chiller Start-Up Procedure

Provides a step-by-step guide for initiating the chiller's operation.

Operating Limits: Temperature and Voltage

Specifies the acceptable operating temperature and voltage limits for the unit.

Flow Rate and Pressure Drop Specs

Details flow rate requirements and chilled water pressure drop characteristics.

Operation Details

Chiller Operational Sequence

Explains the step-by-step sequence of chiller operation, including delays and fan control.

Sensor Monitoring and RTD Data

Covers the RTD sensors used for monitoring temperatures and their resistance data.

Service and Maintenance

Cooling Cycle Components and Compressor

Illustrates cooling cycle components and describes the compressor's construction and operation.

Compressor Troubleshooting and Protection

Lists common compressor issues, causes, remedies, and protection methods.

Condenser and Fan Maintenance

Provides guidance on condenser coil cleaning and condenser fan assembly.

Switches for Control and Safety

Describes flow, pressure, and anti-freezing switches for unit control and safety.

Refrigerant and Oil Cycle Management

Details procedures for refrigerant/oil charging, and components like filters and valves.

Control and Power Panel Layout

Shows the physical layout of the power and control panels.

Power Panel Electrical Components

Covers power panel components: starters, OCRs, voltage monitoring, and relays.

Contactors and Control Panel Internals

Explains contactors, and internal control panel components like PLC, sensors, and fans.

Maintenance Schedule

Trouble Shooting

General Malfunction Diagnosis

Introduces general troubleshooting steps for unit malfunctions and system issues.

Alarm Recognition, Causes, and Remedies

Lists various alarms, their recognition, possible causes, and recommended remedies.

Appendix

Wiring Diagrams and Schematics

Provides detailed electrical wiring diagrams for unit components.

Cycle Diagram and Legend

Illustrates the refrigerant and oil cycle with a component legend.

Installation and Operation Checklists

Offers checklists for project information, model details, equipment checks, and start-up parameters.

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