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Haier AU242AGEAA - User Manual

Haier AU242AGEAA
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Commercial Air Conditioning
SERVICE MANUAL
Models
AU182AEEAA
AU242AGEAA
AU48NAIEAA
AU60NAIEAA
AP482AKEAA
zFeatures
zHigh energy efficiency
zFixed frequency
zOptional different side frame color
zQuiet operation
zAuxiliary electric heating function (optional)
zNew friendly refrigerant R410a, environment protection
zWeekly timer (standard)
zGroup control function
zAuto restart function
Manual code: SYJS-029-06REV.0 Edition: 2006-08-24

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Haier AU242AGEAA Specifications

General IconGeneral
TypeSplit System
Cooling Capacity24000 BTU/h
InverterYes
Power Supply220-240V, 50Hz
Energy Efficiency Ratio (EER)3.21
RefrigerantR32

Summary

1. Description of Products & Features

1.4 Product Features

Highlights key features like R410a refrigerant, universal outdoor unit, quiet operation, and LCD display.

2. Specification

3. Safety Precautions

General Safety Warnings

Outlines critical safety warnings for operation, maintenance, and installation.

Handling Abnormal Conditions

Instructions for responding to abnormal phenomena and maintenance safety.

Electrical Safety and Installation Guidelines

Details electrical safety, earthing, fuse usage, and installation precautions.

5. Installation Instructions

6. Parts and Functions

8. Electrical Control Functions

Indoor AUTO FAN Control

Details how the fan speed adjusts automatically during cooling and heating cycles based on temperature.

Heating Mode Protections & Functions

Details overheat protection, anti-cold air, remaining heat, and auxiliary heating functions.

System Protection & Panel Selection

Covers compressor startup protection, sensor failure, communication failure, and panel configuration.

8.2 Outdoor Unit Control

Defrost Control

Explains the conditions and operation for the defrost cycle in heating mode.

Overheat, Overcurrent, and Pressure Protections

Details protections for overheating, overcurrent, high/low pressure, and related error codes.

9. Refrigerant Circuit

10. Electric Data

11. Troubleshooting

Pressure Protection Troubleshooting

Provides a flowchart for diagnosing and resolving pressure-related protection issues.

Low Pressure Protection Troubleshooting

Details steps to diagnose and fix issues related to low pressure protection.

High Pressure Protection Troubleshooting

Outlines the troubleshooting process for high pressure protection faults.

Communication Error Troubleshooting

Addresses communication errors between indoor/outdoor units and wired controllers.

High Current Protection (3-Phase)

Details troubleshooting for high current protection in 3-phase models and external alarms.

Overcurrent Protection (Single-Phase)

Covers troubleshooting for overcurrent protection in single-phase fixed frequency models.

Indoor Fan Motor Fault Troubleshooting

Provides a diagnostic flowchart for indoor fan motor issues, including capacitor and winding checks.

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