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General| Brand | Haier |
|---|---|
| Model | AU122AEERA |
| Category | Air Conditioner |
| Language | English |
Lists the model numbers covered by the service manual.
Lists the key features and capabilities of the air conditioning units.
Explains the structure and meaning of product model codes.
Details working conditions for different climate types (T1, T2, T3).
Specifies the operational parameters for cooling and heating modes.
Summarizes advanced features like R410a refrigerant and DC inverter technology.
Outlines the sequence of installation steps for refrigerant handling.
Provides essential safety and operational advice for piping work.
Lists technical specifications for the AB122ACERA model.
Lists technical specifications for the AC122ACERA model.
Lists technical specifications for the AD122ALERA model.
Lists technical specifications for the AU122AEERA model.
Provides dimensional drawings for the AB122ACERA unit.
Provides dimensional drawings for the AC122ACERA unit.
Provides dimensional drawings for the AD122ALERA unit.
Provides dimensional drawings for the AU122AEERA unit.
Lists necessary accessories for installation.
Guides on choosing the optimal installation location.
Specifies required space around the unit for proper function.
Provides guidance for installing in areas prone to strong winds.
General steps for outdoor unit installation.
Details on connecting refrigerant pipes.
Important warnings and tips for piping connections.
Describes the procedure for discharging air from the system.
Guidance on selecting appropriate wires for power supply.
Step-by-step instructions for electrical connections.
Lists tools required for indoor unit installation.
Lists included accessories for indoor unit setup.
Guidelines for choosing the best location for the indoor unit.
Steps to prepare before installing the indoor unit.
Instructions on how to install suspending bolts for mounting.
Procedures for physically mounting the indoor unit.
Steps and guidelines for installing the drain pipe.
Precautions related to the water drainage lifting pipe.
Instructions for installing the decorative ornament panel.
General steps for installing the AC122ACERA unit.
Pre-installation checks and preparations for the indoor unit.
Specific installation method for floor-mounted units.
Instructions on drilling holes for refrigerant pipes.
Steps for correctly installing the drain hose.
Specific installation method for units mounted under the ceiling.
Instructions for drilling holes for piping in under-ceiling installations.
Steps for drilling and installing anchor bolts.
Instructions for mounting the necessary brackets.
Detailed steps for installing the indoor unit itself.
Specifics on installing the drain hose for AC122ACERA.
Instructions for mounting the panel board.
Guidelines for selecting the installation space for AD122ALERA.
General steps to follow after selecting the installation space.
How to install the ductwork for the indoor unit.
Specifics on installing the air sending duct.
Specifics on installing the air return duct.
Instructions for insulating the air ducts.
Guidance on installing suspension screws for ductwork.
Details on materials for pipes and insulation.
Specific information regarding the hose used.
Procedure for confirming proper drain function.
Details control functions related to the outdoor unit.
Overview of primary system operational functions.
Explains control of outdoor unit running frequency.
Details the compressor startup sequence and parameters.
Describes how cooling, heating, and dry modes function.
How compressor frequency changes dynamically.
Functions related to controlling the outdoor fan motor.
Describes the 7 fan speed classes.
Explains the function after compressor shutdown.
Specific motor control for cooling and dry modes.
Details the Electronic Expansion Valve control.
Describes the EEV's operational movements and parameters.
Explains EEV angle adjustments post-compressor startup.
Details how to confirm over-heat degrees.
Explains the function and control of the 4-way valve.
Procedures for controlling the defrost cycle.
Criteria for initiating the defrost operation.
Detailed steps during the defrost cycle.
Conditions that cause the defrost cycle to end.
Function of the PTC output.
Logic for controlling the auxiliary heater.
Explanation of the self-diagnostic function.
Description of the time shorting control.
Overview of extra operational features.
Specifies the delay between compressor stops and restarts.
Protection mechanism against high discharge temperatures.
Protection against high indoor coil temperatures.
Protection against excessive electrical current.
Details high and low pressure protection systems.
How sensor failures are detected and managed.
Protection mechanism to prevent freezing.
How the unit operates in rated modes.
How to force specific operations via dip switches.
Lists error codes and their causes.
Describes additional operational modes.
Operation based on a power signal.
Operation using a soft signal for gradual changes.
Operation controlled by a time shorting signal.
Forced cooling or heating modes.
Diagnosing and resolving sensor failures.
Troubleshooting steps for power module issues.
Diagnosing abnormal DC motor operation.
Troubleshooting communication failures between units.
Troubleshooting compressor overheat protection.
Troubleshooting high pressure issues.
Diagnosing abnormal power supply.
Troubleshooting EEPROM or parameter related faults.
Troubleshooting circuit and module errors.
Diagnosing communication issues between PCB and module.
Troubleshooting low pressure conditions.
Diagnosing problems with the 4-way valve or refrigerant.
Troubleshooting issues related to refrigerant levels or dirt.
Presents noise level data for the AD122ALERA model.
Presents noise level data for the AB122ACERA model.
Presents noise level data for the AU122AEERA model.
Presents noise level data for the AC122ACERA model.
