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Change for life
Service Manual
Models:
GWH12AAB-K3DNA1A
GWH12AAB-K3DNA2A
GWH12AAB-K3DNA3A
GWH12AAB-K3DNA4A
GWH12AAB-K3DNA5A
(Refrigerant R410A)
GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI

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Summarization of Contents

Part I : Technical Information
1. Summary
Lists various indoor unit models with their corresponding part codes.
2. Specifications
Detailed technical specifications including electrical, performance, and physical data.
2.4 Cooling and Heating Data Sheet in Rated Frequency
Data sheet for cooling and heating performance at rated frequency.
2.2 Operation Characteristic Curve
Graphs showing operational characteristics under different conditions.
2.3 Capacity Variation Ratio According to Temperature
Data on how capacity changes with ambient temperature.
2.5 Noise Curve
Graphs illustrating noise levels for indoor and outdoor units.
3. Outline Dimension Diagram
Diagrams showing the physical dimensions of the indoor unit.
3.2 Outdoor Unit
Diagrams showing the physical dimensions of the outdoor unit.
4. Refrigerant System Diagram
Illustrates the refrigerant circuit for cooling and heating modes.
5. Electrical Part
Provides detailed wiring diagrams for the air conditioning system.
5.1 Wiring Diagram
Detailed wiring diagrams for the air conditioning system.
6. Function and Control
Explanation of the remote controller operations and unit modes/functions.
6.1 Remote Controller Introduction of YAW1F
Explains the buttons and icons of the YAW1F remote controller.
6.2 Remote Controller Introduction of YAW1F5(WiFi)
Details the features and operation of the YAW1F5(WiFi) remote controller.
6.3 Ewpe Smart App Operation Manual
Guide for operating the Ewpe Smart App for smart home control.
6.4 GREE+ App Operation Manual
Instructions for using the GREE+ App for smart home appliance control.
6.5 Brief Description of Modes and Functions
Explains the basic modes and functions of the air conditioning unit.
Outdoor Unit Operations & Protections
1. Input Parameter Compensation and Calibration
Procedures for calibrating input parameters and ambient temperature compensation.
2. Basic Functions
Explains the basic operating modes like cooling, heating, and air-supply.
3. Special Functions
Details on defrosting, control logic, and various protection functions.
Defrosting Control
Conditions and procedures for starting and finishing defrosting operations.
4. Control Logic
Details the control logic for compressor, fans, and 4-way valve.
1. Frequency limited
Describes frequency limiting for various protection scenarios.
(5) Overload protection function
Explains overload protection for cooling, dehumidifying, and heating modes.
(6)Voltage sag protection
Procedures for handling voltage sag protection.
(7)Communication fault
Describes actions to take for communication faults.
(8)Module protection
Explains module protection procedures.
(9)Module overheating protection
Details module overheating protection and frequency limits.
(10)Compressor overloads protection
Procedures for compressor overload protection.
(11)Phase current overcurrent protection of compressor
Describes phase current overcurrent protection for the compressor.
(12) Starting-up Failure Protection for Compressor
Procedures for compressor start-up failure protection.
(13) Out-of-Step Protection for Compressor
Details out-of-step protection for the compressor.
(14) Voltage Abnormity Protection for DC Bus
Explains voltage abnormality protection for the DC bus.
(15)Abnormity Protection for Four-way Valve
Describes abnormality protection for the four-way valve.
(16) PFC Protection
Details PFC protection procedures.
(17) Failure Detection for Sensor
Explains how to detect sensor failures.
Installation and Maintenance
7. Notes for Installation and Maintenance
Important safety precautions for installation and maintenance procedures.
Safety Precautions
Crucial safety warnings and precautions for handling the unit.
Electrical Safety Precautions
Specific safety guidelines for electrical work.
Installation Safety Precautions
Precautions to be taken during the installation process.
Refrigerant Safety Precautions
Safety measures related to refrigerant handling.
Safety Precautions for Installing and Relocating the Unit
General warnings and critical safety information for installation.
Warnings
General warnings and critical safety information for installation.
8. Installation
Guidelines for selecting location, parts check, electric connection, and unit installation.
Installation Location & Requirements
Guidelines for selecting location, parts check, electric connection, and unit installation.
Installation Procedures Flowchart
Flowchart outlining the overall installation process.
8.6 Installation of Outdoor Unit
Step-by-step guide for installing the outdoor unit.
Vacuum Pumping & Leak Detection
Procedures for vacuum pumping and detecting refrigerant leaks.
Post-Installation Checks & Test Operation
Steps for checking installation and performing test operations.
9. Maintenance
Information on error codes, troubleshooting, and general maintenance.
9.1 Error Code List
Lists error codes and their corresponding causes and status.
Malfunction Analysis and Processing
Solutions for common malfunction displays like compressor protection.
9.2 Troubleshooting for Main Malfunction
Step-by-step guides for troubleshooting common malfunctions.
Outdoor Unit Malfunctions
Troubleshooting for capacity charging and IPM protection issues.
Capacity Charging & IPM Protection
Troubleshooting for capacity charging and IPM protection issues.
Temperature & Start-up Failures
Troubleshooting for high temperature, overload, and start-up failures.
Overload & Discharge Temperature Issues
Diagnosing and resolving overload and high discharge temperature issues.
Communication & Compressor Overload
Troubleshooting communication malfunctions and compressor overload protection.
Overcurrent Protection Malfunctions
Diagnosing and resolving overcurrent protection issues.
9.3 Troubleshooting for Normal Malfunction
Troubleshooting when the unit fails to start or has poor cooling/heating.
Start-up & Performance Issues
Troubleshooting when the unit fails to start or has poor cooling/heating.
Leaks & Abnormal Sounds
Diagnosing and fixing leaks, and addressing unusual sounds/vibrations.
Component Lists and Removal
10. Exploded View and Parts List
Visual breakdowns and part numbers for indoor and outdoor units.
10.1 Indoor Unit Parts
Exploded view and parts list for the indoor unit.
10.2 Outdoor Unit Parts
Exploded view and parts list for the outdoor unit.
11. Removal Procedure
Step-by-step guides for safely removing indoor and outdoor unit components.
11.1 Indoor Unit Removal
Step-by-step guides for safely removing indoor unit components.
11.2 Outdoor Unit Removal
Step-by-step guides for safely removing outdoor unit components.
Appendices
Appendix 1: Reference Sheet of Celsius and Fahrenheit
Reference sheets for temperature conversions and pipe specifications.
Appendix 2: Configuration of Connection Pipe
Reference sheets for temperature conversions and pipe specifications.
Appendix 3: Pipe Expanding Method
Methods for pipe expansion and sensor resistance tables.
Appendix 4: List of Resistance for Temperature Sensor
Methods for pipe expansion and sensor resistance tables.

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