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Gree GWHD(24)NK3GO User Manual

Gree GWHD(24)NK3GO
112 pages
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GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI
Change for Life
Service Manual
Model: GWHD(18)NK3FO
GWHD(24)NK3FO
GWHD(24)NK3GO
GWHD(28)NK3FO
GWHD(36)NK3BO
GWHD(42)NK3AO
(Refrigerant
:
R410A)
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Gree GWHD(24)NK3GO Specifications

General IconGeneral
RefrigerantR410A
Indoor Unit Dimensions (W x H x D)845 x 290 x 200 mm
Outdoor Unit Dimensions (W x H x D)870 x 635 x 340 mm
Weight (Outdoor Unit)42 kg
TypeSplit System
Outdoor Unit Weight42 kg
Power Supply220-240V, 50Hz
Cooling Capacity24000 BTU/h

Summary

Part I: Technical Information

1. Summary

Provides a brief overview of the outdoor unit models covered in the manual.

2. Specifications

3. Outline Dimension Diagram

4. Refrigerant System Diagram

5. Electrical Part

5.1 Wiring Diagram

Diagrams showing the electrical connections for different models, crucial for installation and troubleshooting.

5.2 PCB Printed Diagram

Printed circuit board layouts with component identification for reference.

6. Function and Control

1. Basic Functions and Modes

Details the system's operation in Cooling, Dry, Heating, and Fan modes.

2. Protection Functions

Describes various protection mechanisms like mode conflict, overload, and temperature protections.

3. Other Functions

Covers refrigerant recovery and master/slave unit settings.

Part II: Installation and Maintenance

7. Safety Precautions

Covers electrical, refrigerant, and general safety guidelines for installation and maintenance.

Main Tools for Installation and Maintenance

Lists necessary tools for performing installation and maintenance tasks.

8. Installation Manual

Step-by-step instructions for installing the air conditioning system.

Installation Procedures Overview

Provides a flowchart of the overall installation process from start to finish.

8.1 Electrical Connections

Details how to connect the power cord and air switch for different models.

8.2 Installing the Outdoor Unit

Guides on selecting location, securing the unit, connecting pipes, and vacuum pumping.

8.3 Installation Dimension Diagram

Illustrates the physical dimensions and required clearances for outdoor units.

8.4 Post-Installation Checks

Lists checks to perform after installation to ensure proper function and safety.

8.5.1 Installation Location and Matters Needing Attention

Provides detailed guidance on selecting optimal locations for indoor and outdoor units.

d. Earthing Requirements

Details the importance and methods of proper earthing for electrical safety.

8.5.2 Outdoor Unit Installation

Specific considerations and procedures for installing the outdoor unit.

Noise Precautions and Accessories

Covers noise reduction during installation and lists required accessories.

8.5.3 Indoor/Outdoor Unit Connection

Details on connecting indoor and outdoor units, including wiring and pipe configurations.

a. Power Cord Wiring

Instructions for connecting the power cord to the unit and ensuring proper wiring.

d. Piping Between Units

Covers pipe dimensions, torque specifications, and installation methods.

8.5.4 Refrigerant Charging and Trial Running

Essential steps for charging refrigerant and performing initial operational tests.

a. Refrigerant Charging

Details on calculating and adding refrigerant charge for optimal performance.

c. Post-Installation Checks

Lists items to check for secure installation and proper function.

d. Trial Running

Procedure for conducting the initial operational test of the installed unit.

9. Maintenance

9.1 Safety Precautions for Maintenance

Critical safety steps before servicing, emphasizing capacitor discharge.

9.2 Malfunction Display and Diagnosis

Explains LED indicators and how to view malfunction codes for diagnosing issues.

9.3 Malfunction Checking and Elimination

Detailed troubleshooting steps and flowcharts for resolving various system malfunctions.

Error Code Descriptions and Troubleshooting Flowcharts

Lists error codes and provides flowcharts for diagnosing and resolving malfunctions.

9.4 Maintenance for Normal Malfunctions

Offers solutions for common issues like unit not starting, poor cooling/heating, and abnormal sounds.

10. Exploded View and Parts List

11. Removal Procedure

Appendix

Appendix 1: Celsius and Fahrenheit Reference

Provides a reference table for converting Celsius to Fahrenheit temperatures.

Appendix 2: Connection Pipe Configuration

Explains pipe configuration, length limits, and refrigerant charging based on pipe size.

Appendix 3: Pipe Expanding Method

Details the steps for expanding pipes correctly to prevent refrigerant leaks.

Appendix 4: Ambient Temperature Sensor Resistance

Lists resistance values for ambient temperature sensors at various temperatures.

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