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Haier AS12TB3HAA User Manual

Haier AS12TB3HAA
44 pages
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SERVICE MANUAL
Wall Mounted Type
ON/OFF T-Series
AS12TB3HAAModel 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˖2015-12-09
HSU-12HT03/R2
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Haier AS12TB3HAA Specifications

General IconGeneral
Cooling Capacity (Ton)1 Ton
Energy Efficiency Rating3 Star
Compressor TypeRotary
TypeSplit
Cooling Capacity12000 BTU/h
Air Flow550 CFM
Noise Level42 dB
Power Supply230V / 50Hz
Air Flow Volume550 CFM
Noise Level (Indoor)42 dB

Summary

1. Introduction

1.1 Model Name Explanation

Explains the alphanumeric code used for model identification.

1.2 Safety Cautions

1.2.1 Caution in Repair

Lists critical warnings and precautions for performing repair work safely.

1.2.2 Cautions Regarding Products after Repair

Provides essential guidelines for ensuring product safety and integrity post-repair.

1.2.3 Inspection after Repair

Details post-repair checks to confirm proper functioning and safety.

1.2.4 Using Icons and Lists

Explains the meaning of icons used to highlight important information in the manual.

2. Features

Product Features Overview

Lists key features like fan settings, timers, and operational modes.

3. Specifications

Nominal Distribution System Voltage

Details voltage, phase, and frequency requirements for the system.

Nominal Capacity and Input

Outlines rated capacity, power consumption, and energy efficiency ratings.

Technical Specifications

Provides detailed technical data including dimensions, weight, and sound levels.

Technical Specifications - Parts

Lists specifications for individual components like fan, heat exchanger, and filters.

Conversion Formulae

Provides formulas for converting between different units of measurement.

4. Sensors List

Room and Pipe Sensor

Describes the type and function of the indoor and pipe sensors.

5. Piping Diagrams

Cooling Mode Piping

Illustrates the refrigerant flow and components during cooling operation.

Heating Mode Piping

Illustrates the refrigerant flow and components during heating operation.

6. Wiring Diagrams

Indoor Unit Diagram

Shows the electrical connections and component layout for the indoor unit PCB.

Connector Wiring Diagram

Details the connections for various connectors on the indoor PCB.

7. Functions and Control

Main Functions and Control Specifications

Overviews the primary functions and control logic of the air conditioner.

Automatic Running Mode

Explains how the unit automatically selects operating modes based on room temperature.

Indoor Temperature Control

Details temperature control ranges, precision, and compressor behavior in cooling and heating.

Dehumidifying Mode

Describes the control logic and temperature settings for dehumidifying operation.

Heating Mode Control

Details heating mode operation, cold draft prevention, and temperature protections.

Defrosting

Explains the conditions and procedures for the automatic defrosting cycle.

Timer Function

Details how to set and use the 24-hour timer function for on/off operations.

Sleep Function

Describes how the sleep mode adjusts temperature and fan speed for comfort.

Emergency Switch Input

Explains the function of the emergency switch for operation modes.

Test Run Procedures

Details the steps and expected behavior during a test run of the unit.

Memory and Auto-Recovery Function

Explains the power-down memory and auto-recovery features of the unit.

Indoor Fan Motor Alarm

Describes the conditions and signals for an indoor fan motor malfunction alarm.

7.2 Value of Thermistor

Indoor Unit Thermistor Values

Provides a table of resistance values for the indoor unit's room sensor at various temperatures.

Pipe Sensor Thermistor Values

Provides a table of resistance values for the pipe sensor at various temperatures.

8. Dimensional Drawings

Indoor Unit Dimensions

Shows the external dimensions of the indoor unit with measurement indicators.

9. Center of Gravity

Indoor Unit Center of Gravity

Illustrates the center of gravity for the indoor unit.

10. Service Diagnosis

Caution for Diagnosis

Provides warnings and guidelines before performing diagnostic procedures.

Primary Electronic Appliance Parameters

Lists specifications for key electronic components like the fan motor.

Problem Symptoms and Measures

Outlines common operational problems and the corresponding checks and measures to resolve them.

Error Codes and Indoor Display Descriptions

Lists error codes displayed on the unit and their corresponding descriptions and reference pages.

Thermistor or Related Abnormality

Details troubleshooting steps for thermistor and related sensor malfunctions, including error codes E1 and E2.

EEPROM Abnormal

Guides troubleshooting for EEPROM errors (E4), focusing on data, EEPROM chip, and PCB issues.

Indoor AC Fan Motor Malfunction

Provides troubleshooting for fan motor malfunctions (E14), including checks for wiring, motor, and PCB.

11. Circuit Diagram

Indoor Unit Circuit Diagram

Presents the detailed electronic circuit diagram for the indoor unit, showing component interconnections.

Removal Procedure

Unit Type and Series

Identifies the specific type and series of the air conditioner for which the procedure applies.

Front Panel Removal

Details the steps for safely removing the front panel of the indoor unit.

Air Filter Removal

Explains the simple process of lifting and pulling out the air filters.

Casing Removal

Details loosening screws, releasing hooks, and removing the casing.

Horizontal Flap and Stepper Motor Removal

Guides the removal of the horizontal flap and the stepper motor.

Horizontal Louver and Control Box Removal

Describes how to remove the horizontal louvers and the main control box.

Heat Exchanger Removal

Outlines the steps to loosen hooks, screws, and lift out the heat exchanger.

Fan Rotor and Fan Motor Removal

Details the process of loosening screws and removing the fan motor cover.

Fan Motor and Fan Removal

Explains how to loosen screws, lift the motor, and remove the fan rotor.

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