Haier HSU-18HEA03/R2(DB)-I User Manual

SERVICE MANUAL
DC Inverter E-Series
Model No. HSU-18HEA03/R2(DB)-I
©2008 (Qingdao Haier Air Conditioner General corp.,Ltd)
All right reserved .Unauthorized copying and distribution is a violation of law
Haier Group
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
repair the product or products dealt with in this service information by anyone else could result in serious injury or death
WARNING
Wall mounted Type
Order No.AC0902S004V0

Haier HSU-18HEA03/R2(DB)-I Specifications

General

Capacity	1.5 Ton
Refrigerant	R32
Power Supply	220-240V, 50Hz
Compressor Type	Rotary
Indoor Unit Noise Level	42 dB(A)
Outdoor Unit Noise Level	55 dB(A)
Type	Split

Summary

SERVICE MANUAL

WARNING

Highlights critical safety information and precautions.

Introduction

Safety Cautions

Details essential safety guidelines for operating and servicing the unit.

Cautions Regarding Products after Repair

Provides safety advice specifically for post-repair handling.

Inspection after Repair

Outlines procedures for verifying safety and functionality after repairs.

List of Functions

Function Overview

Specifications

Printed Circuit Board Connector Wiring Diagram

Indoor Unit Connectors

Outdoor Unit Connectors

Functions and Control

Indoor Unit Functions and Control

Details on indoor unit modes, settings, and protective features.

Outdoor Unit Control System

Explains the control logic for compressor, fan, and defrost functions.

Cautions

Safety Instructions

General safety advice for unit usage, installation, and maintenance.

Operation

Standard Operation Modes

Sleep and Timer Operations

Emergency and Test Operation

Maintenance

Trouble shooting

Performance Checks

Guides on common issues and initial checks for troubleshooting.

Multiple Check Points

Service Diagnosis

Diagnostic Overview

Includes cautions, symptoms, and error code analysis.

Error Codes and Display Descriptions

Lists error indicators and their corresponding meanings.

Troubleshooting Procedures

Step-by-step diagnostic guides for specific malfunctions.

Installation

Installation Essentials

Unit Placement and Connections

Guidelines for mounting, power, pipes, purging, and drainage.

Removal Procedure

Indoor Unit Disassembly

Outdoor Unit Disassembly