Haier 1U12BE8ERA User Manual

SERVICE MANUAL
Wall Mounted Type
DC Inverter
1U12BE8ERAModel 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
2015 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version˖V1 Date˖2015-11-13

Haier 1U12BE8ERA Specifications

General

Brand	Haier
Model	1U12BE8ERA
Category	Air Conditioner
Language	English

Summary

1. Introduction

1.1 Model Name Explanation

Explains the structure and meaning of the product model number.

1.2 Safety Cautions

Provides critical safety warnings and precautions for servicing and operating the unit.

2. Specifications

4. Piping Diagrams

Cooling Mode Piping Diagram

Illustrates the refrigerant circuit and component layout for cooling operation.

Heating Mode Piping Diagram

Illustrates the refrigerant circuit and component layout for heating operation.

5. Operation Range

6. Printed Circuit Board Connector Wiring Diagram

PCB (1) Control Board Connectors

Lists and describes all connectors on the control PCB.

PCB (2) Module Board Connectors

Lists and describes all connectors on the module PCB.

7. Functions and Control

7.1 Main Functions and Control Specification

Details the primary operational functions and control specifications.

7.1.1 Operation Frequency of Outdoor Unit and its Control

Explains compressor frequency control and limitations.

7.1.2 Outdoor Fan Control (Exchange Fan)

Describes how the outdoor fan speed is managed.

7.1.3 Protection Function

Covers various protection mechanisms including TTC, TC, over-current, anti-freezing, etc.

7.1.4 Four Way Control

Details the operation of the four-way reversing valve.

7.2 Value of Thermistor

Provides thermistor resistance values across temperature ranges.

10. Service Diagnosis

10.1 Caution for Diagnosis

Key warnings and prerequisites for accurate fault diagnosis.

10.2 Problem Symptoms and Measures

Lists common operational issues and recommended troubleshooting steps.

10.3 Error Codes and Description indoor display

Explains error codes displayed by the unit and their causes.

10.3.1 Thermistor or Related Abnormality

Troubleshooting guide for thermistor failures.

10.3.2 EEPROM abnormal

Procedures for diagnosing and resolving EEPROM errors.

10.3.3 Indoor AC fan motor malfunction

Steps to diagnose issues with the indoor fan motor.

10.3.4 Outdoor DC fan motor fault

Steps to diagnose problems with the outdoor DC fan motor.

10.3.5 IPM protection

Addresses faults related to IPM protection.

10.3.6 Over-current of the compressor

Troubleshooting guide for compressor over-current conditions.

10.3.7 Communication fault between IPM and outdoor PCB

Diagnosing communication failures between IPM and outdoor PCB.

10.3.8 Power Supply Over or under voltage fault

Troubleshooting power supply voltage irregularities.

10.3.9 Overheat Protection For Discharge Temperature

Diagnosing and resolving overheat protection for discharge temperature.

10.3.10 The communication fault between indoor and outdoor

Troubleshooting communication errors between indoor and outdoor units.

10.3.11 Loss of synchronism detection

Diagnosing compressor rotor synchronism loss.

10.3.12 High work-intense protection

Troubleshooting issues related to high work-intense protection.

11. Performance and Curves Diagrams

11.1 Cooling Capacity-Temperature Curves

Graphical representation of cooling capacity at various temperatures.

11.2 Cooling Power Consumption Value-Temperature Curves

Graphical representation of power consumption at various temperatures.

11.3 Cooling Discharge Pressure Curves

Graphical representation of discharge pressure at various temperatures.

11.4 Cooling Suction Pressure Curves

Graphical representation of suction pressure at various temperatures.

11.5 Heating Capacity-Temperature Curves

Graphical representation of heating capacity at various temperatures.

11.6 Heating Power Consumption Value-Temperature Curves

Graphical representation of heating power consumption at various temperatures.

11.7 Heating Discharge Pressure Curves

Graphical representation of heating discharge pressure at various temperatures.

11.8 Heating Suction Pressure Curves

Graphical representation of heating suction pressure at various temperatures.

12. Circuit Diagram

12.1 Outdoor Unit Control Board Circuit Diagrams

Detailed circuit schematics for the outdoor control board.

12.2 Module Board Circuit Diagram

Detailed circuit schematic for the module board.

Removal Procedure

1. Removal of Outdoor Panel

Step-by-step guide to safely detach the outdoor unit's casing.

2. Removal of Electrical Box

Step-by-step guide to remove the electrical component housing.

3. Removal of Fan and Fan Motor

Step-by-step guide to detach the fan and its motor.

4. Removal of Fan Motor Bracket and Partition

Step-by-step guide to remove the fan motor mounting bracket and partition.

5. Removal of Compressor and Heat Exchanger

Step-by-step guide to detach the compressor and heat exchanger.