Haier AS50XCAHRA User Manual

SERVICE MANUAL
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
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Version V1 Date 2022-1 -20
Wa ll Mounted Type
DC Inverter
Model No.
AS50XCAHRA

Haier AS50XCAHRA Specifications

General

Type	Inverter
Cooling Capacity	5.0 kW
Refrigerant	R32
Power Supply	220-240V, 50Hz
Operating Temperature (Cooling)	18-43 °C

Summary

1 Introduction

1.1 Model name explanation

Explains the model name structure for AS50XCAHRA.

1.2 Safety Cautions

Covers installation wiring, repair cautions, post-repair advice, inspection steps, and icon usage.

2. Features

3. Specifications

4. Sensors list

5. Piping diagrams

6. Printed Circuit Board Connector Wiring Diagram

7. Functions and Control

7.1 Main functions and control specification

Overviews the main operational modes and control logic.

7.1.1 Automatic operation

Explains how the system automatically selects modes based on temperature.

7.1.2 Cooling operation mode

Details the temperature control and airflow speed for cooling.

7.1.3 Dehumidifying mode.

Explains the temperature control and operation for dehumidifying.

7.1.4 Heating operation mode.

Details temperature control, fan speeds, and cold air proofing in heating.

7.1.5 Strength operation

Describes the 'strength' operation mode and its activation.

7.1.6 Mute operation

Explains the 'mute' operation mode for reduced noise.

7.1.7 Air refreshing (This model does not choose)

Describes the air refreshing function, noting it's not applicable to this model.

7.1.8 Timing

Details the 24-hour on/off timing functions.

7.1.9 Dormant operation

Explains the 8-hour dormant operation mode and its temperature adjustments.

7.1.10 Urgent on/off input

Describes the function of the urgency button for immediate operation or testing.

7.1.11 Low load protection control

Explains the protection mechanism against low load conditions.

7.1.12 High load protection control

Details the protection mechanism against high load conditions.

7.1.13 Abnormal operation of indoor system

Describes malfunctions due to mismatched indoor/outdoor system modes.

7.1.14 Malfunction list resume.

Explains how the malfunction list is displayed and reset.

7.1.15 Abnormality confirmation approaches

Methods for confirming abnormalities like sensor failures.

8.Dimensional drawings

9.Center of gravity

10. Service Diagnosis

10.1 Caution for Diagnosis

Warnings before performing diagnostic procedures.

10.2 Problem Symptoms and Measures

Lists common symptoms and their corresponding check items and measures.

10.3 Error Codes and Description indoor display

Lists error codes and their descriptions for indoor and outdoor units.

10.3.1 Thermistor or Related Abnormality

Details thermistor failures, causes, and troubleshooting steps.

10.3.2 EEPROM abnormal

Describes EEPROM errors, causes, and troubleshooting.

10.3.3 Indoor fan motor malfunction

Explains indoor fan motor failures, causes, and checks.

10.3.4 Outdoor DC fan motor fault

Details outdoor fan motor faults, causes, and troubleshooting.

10.3.5 IPM protection

Describes IPM protection issues, causes, and troubleshooting.

10.3.6 Over-current of the compressor

Details compressor over-current issues, causes, and troubleshooting.

10.3.7 The communication fault between IPM and outdoor PCB

Explains communication faults between IPM and outdoor PCB.

10.3.8 Power Supply Over or under voltage fault

Describes power supply voltage issues and troubleshooting.

10.3.9 Overheat Protection For Discharge Temperature

Explains overheat protection related to discharge temperature.

10.3.10 The communication fault between indoor and outdoor

Details communication faults between indoor and outdoor units.

10.3.11 Loss of synchronism detection

Describes issues with inverter side current detection and synchronism.

10.3.12 High work-intense protection

Explains high work-intense protection in heating mode.

11. Wiring diagrams

1.1 INDOOR UNIT

Provides the wiring diagram for the indoor unit.

11.2 Circuit Diagrams

Shows the detailed circuit diagrams for the unit.

REMOVAL PROCEDURE

1. Remove the front panel

Step-by-step guide to remove the front panel of the indoor unit.

2. Remove the air filters and horizontal flap

Instructions for removing air filters and the horizontal flap.

3. Removal of Fan motor and fun

Steps to remove the fan motor and fan assembly.

Removal of Fan motor and fan

Steps to remove the fan motor and fan.

4. Remove the casing

Instructions for removing the main casing of the unit.

5. Release stepping motor wires and the control box

Steps to disconnect stepping motor wires and remove the control box.

6. Removal of Heat Exchanger

Procedure for removing the heat exchanger.