Haier Group 1U71SA1ERA - User Manual

SERVICE MANAUL
Wall Mounted Type
DC Inverter
T-Series
1U53RA1ERA
1U71SA1ERA
Model No.
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
2016 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version：V1 Date：2016-10-30

Summary

1 Introduction

1.2 Safety Cautions

Essential warnings and precautions for safe operation and maintenance.

1.2.1 Caution in Repair

Specific safety advice to be followed during repair procedures.

1.2.2 Cautions Regarding Products after Repair

Safety guidelines to follow after repair work is completed.

1.2.3 Inspection after Repair

Checks required after repair to ensure proper function and safety.

2 Specifications

Nominal Distribution System Voltage

Details on the voltage requirements for system operation.

Nominal Capacity and Input

Rated cooling/heating capacity and power input values.

Unit Technical Specifications

Physical dimensions, weight, and sound level of the unit.

Electrical Specifications

Current ratings and voltage requirements for electrical components.

Parts Technical Specifications

Specifications for key components like compressor, fan, and heat exchanger.

4 Piping Diagrams

6 Printed Circuit Board Connector Wiring Diagram

PCB (1) Outdoor Control PCB Connectors

PCB (2) Module PCB Connectors

7 Functions and Control

7.1 Main Functions and Control Specification

7.1.1 Operation Frequency Control

7.1.5 Protection Functions

Description of various protection mechanisms for the unit.

7.2 Value of Thermistor

10 Service Diagnosis

10.1 Caution for Diagnosis

Important precautions before starting diagnostic procedures.

10.2 Problem Symptoms and Measures

Troubleshooting guide for common operational issues.

10.3 Error Codes and Indoor Display

List of error codes and their descriptions for unit malfunctions.

10.3.1 Thermistor or Related Abnormality

10.3.4 Outdoor DC Fan Motor Fault

10.3.5 IPM Protection

10.3.10 Communication Fault Indoor;Outdoor

10.3.11 Loss of Synchronism Detection

13 Circuit diagrams

13.1 Outdoor unit control board Circuit Diagrams

13.2 Module board Circuit Diagram

Haier Group 1U71SA1ERA Specifications

General

Brand	Haier Group
Model	1U71SA1ERA
Category	Air Conditioner
Language	English