Daikin ERGA04EAV3 - User Manual

300 pages

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Installer reference guide

Daikin Altherma 3 R F

ERGA04EAV3

ERGA06EAV3H

ERGA08EAV3H

ERGA04EAV3A

ERGA06EAV3A

ERGA08EAV3A

EHVH04SU18EA6V

EHVH04SU23EA6V

EHVH08SU18EA6V

EHVH08SU23EA6V

https://daikintechnicaldatahub.eu

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Questions and Answers

L
Larry HobbsAug 8, 2025
Why is my Daikin ERGA04EAV3 not heating or cooling properly?
- M
  milleralexisAug 8, 2025
  There are several possible reasons why your Daikin Heat Pump isn't heating or cooling as expected. It could be due to an incorrect temperature setting on the remote controller. Make sure to check the temperature setting and refer to the operation manual. Another potential cause is low water flow. Ensure all shut-off valves in the water circuit are fully open, the water filter is clean, and there's no air in the system. Also, verify the water pressure is above 1 bar, the expansion vessel isn't broken, and the valve towards the expansion vessel is open. Finally, check that the water volume in the installation is above the minimum required value.
R
Richard ShawAug 22, 2025
What to do if Daikin ERGA04EAV3 water flow is too low?
- D
  davidhunterAug 22, 2025
  If the water flow is too low, check and ensure that all shut-off valves of the water circuit are completely open, the water filter is clean (clean if necessary), there is no air in the system (purge air if necessary), the water pressure is >1 bar, the expansion vessel is NOT broken, the valve (if equipped) of the water circuit towards the expansion vessel is open and the resistance in the water circuit is NOT too high for the pump.

Summary

1 About this document

1.1 Meaning of warnings and symbols

Explains the meaning of various warning symbols used for safety.

2 General safety precautions

2.1 For the installer

Covers essential safety instructions and precautions for installers.

3 Specific installer safety instructions

Handling the unit

Safety instructions for physically handling the unit components.

Installation site

Safety requirements related to the chosen installation location.

Special requirements for R32 units

Mounting the outdoor unit

Mounting the indoor unit

Piping installation

Safety precautions for installing refrigerant and water piping.

Electrical installation

Safety instructions for performing electrical wiring and connections.

6 Application guidelines

6.2 Setting up the space heating;cooling system

Guidelines for configuring the space heating and cooling system setup.

6.3 Setting up an auxiliary heat source for space heating

6.4 Setting up the domestic hot water tank

Procedures for setting up and configuring the domestic hot water tank.

6.5 Setting up the energy metering

6.6 Setting up the power consumption control

7 Unit installation

7.1 Preparing the installation site

7.3 Mounting the outdoor unit

7.4 Mounting the indoor unit

8 Piping installation

8.1 Preparing refrigerant piping

Requirements and preparation steps for refrigerant piping.

8.2 Connecting the refrigerant piping

Step-by-step instructions for connecting refrigerant piping.

8.3 Checking the refrigerant piping

Procedures for checking the refrigerant piping for leaks and vacuum.

8.4 Charging refrigerant

Instructions on how to safely charge the system with refrigerant.

8.5 Preparing water piping

Requirements and preparation steps for water piping connections.

8.6 Connecting water piping

Step-by-step instructions for connecting water piping.

9 Electrical installation

9.1 About connecting the electrical wiring

General information and precautions for electrical wiring.

9.2 Connections to the outdoor unit

9.3 Connections to the indoor unit

10 Configuration

10.2 Configuration wizard

Step-by-step guidance for the initial system configuration.

10.4 Preset values and schedules

10.5 Weather-dependent curve

10.6 Settings menu

11 Commissioning

11.2 Precautions when commissioning

Important safety precautions to follow during commissioning.

11.3 Checklist before commissioning

11.4 Checklist during commissioning

12 Hand-over to the user

13 Maintenance and service

13.1 Maintenance safety precautions

Essential safety measures to be taken during maintenance.

13.2 Yearly maintenance

13.3 To drain the domestic hot water tank

13.5 About cleaning the water filter in case of trouble

14 Troubleshooting

14.2 Precautions when troubleshooting

Safety precautions to follow before and during troubleshooting.

14.3 Solving problems based on symptoms

Guidance on resolving issues based on observed symptoms.

14.4 Solving problems based on error codes

Procedures for resolving issues identified by error codes.

16 Technical data

Summary

1 About this document

1.1 Meaning of warnings and symbols

Explains the meaning of various warning symbols used for safety.

2 General safety precautions

2.1 For the installer

Covers essential safety instructions and precautions for installers.

3 Specific installer safety instructions

Handling the unit

Safety instructions for physically handling the unit components.

Installation site

Safety requirements related to the chosen installation location.

Special requirements for R32 units

Mounting the outdoor unit

Mounting the indoor unit

Piping installation

Safety precautions for installing refrigerant and water piping.

Electrical installation

Safety instructions for performing electrical wiring and connections.

6 Application guidelines

6.2 Setting up the space heating;cooling system

Guidelines for configuring the space heating and cooling system setup.

6.3 Setting up an auxiliary heat source for space heating

6.4 Setting up the domestic hot water tank

Procedures for setting up and configuring the domestic hot water tank.

6.5 Setting up the energy metering

6.6 Setting up the power consumption control

7 Unit installation

7.1 Preparing the installation site

7.3 Mounting the outdoor unit

7.4 Mounting the indoor unit

8 Piping installation

8.1 Preparing refrigerant piping

Requirements and preparation steps for refrigerant piping.

8.2 Connecting the refrigerant piping

Step-by-step instructions for connecting refrigerant piping.

8.3 Checking the refrigerant piping

Procedures for checking the refrigerant piping for leaks and vacuum.

8.4 Charging refrigerant

Instructions on how to safely charge the system with refrigerant.

8.5 Preparing water piping

Requirements and preparation steps for water piping connections.

8.6 Connecting water piping

Step-by-step instructions for connecting water piping.

9 Electrical installation

9.1 About connecting the electrical wiring

General information and precautions for electrical wiring.

9.2 Connections to the outdoor unit

9.3 Connections to the indoor unit

10 Configuration

10.2 Configuration wizard

Step-by-step guidance for the initial system configuration.

10.4 Preset values and schedules

10.5 Weather-dependent curve

10.6 Settings menu

11 Commissioning

11.2 Precautions when commissioning

Important safety precautions to follow during commissioning.

11.3 Checklist before commissioning

11.4 Checklist during commissioning

12 Hand-over to the user

13 Maintenance and service

13.1 Maintenance safety precautions

Essential safety measures to be taken during maintenance.

13.2 Yearly maintenance

13.3 To drain the domestic hot water tank

13.5 About cleaning the water filter in case of trouble

14 Troubleshooting

14.2 Precautions when troubleshooting

Safety precautions to follow before and during troubleshooting.

14.3 Solving problems based on symptoms

Guidance on resolving issues based on observed symptoms.

14.4 Solving problems based on error codes

Procedures for resolving issues identified by error codes.

16 Technical data

Daikin ERGA04EAV3 Specifications

General

Brand	Daikin
Model	ERGA04EAV3
Category	Heat Pump
Language	English

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Daikin ERGA04EAV3 - User Manual

Table of Contents

Questions and Answers

Summary

1 About this document

1.1 Meaning of warnings and symbols

2 General safety precautions

2.1 For the installer

3 Specific installer safety instructions

Handling the unit

Installation site

Special requirements for R32 units

Mounting the outdoor unit

Mounting the indoor unit

Piping installation

Electrical installation

6 Application guidelines

6.2 Setting up the space heating;cooling system

6.3 Setting up an auxiliary heat source for space heating

6.4 Setting up the domestic hot water tank

6.5 Setting up the energy metering

6.6 Setting up the power consumption control

7 Unit installation

7.1 Preparing the installation site

7.3 Mounting the outdoor unit

7.4 Mounting the indoor unit

8 Piping installation

8.1 Preparing refrigerant piping

8.2 Connecting the refrigerant piping

8.3 Checking the refrigerant piping

8.4 Charging refrigerant

8.5 Preparing water piping

8.6 Connecting water piping

9 Electrical installation

9.1 About connecting the electrical wiring

9.2 Connections to the outdoor unit

9.3 Connections to the indoor unit

10 Configuration

10.2 Configuration wizard

10.4 Preset values and schedules

10.5 Weather-dependent curve

10.6 Settings menu

11 Commissioning

11.2 Precautions when commissioning

11.3 Checklist before commissioning

11.4 Checklist during commissioning

12 Hand-over to the user

13 Maintenance and service

13.1 Maintenance safety precautions

13.2 Yearly maintenance

13.3 To drain the domestic hot water tank

13.5 About cleaning the water filter in case of trouble

14 Troubleshooting

14.2 Precautions when troubleshooting

14.3 Solving problems based on symptoms

14.4 Solving problems based on error codes

16 Technical data

Summary

1 About this document

1.1 Meaning of warnings and symbols

2 General safety precautions

2.1 For the installer

3 Specific installer safety instructions

Handling the unit

Installation site

Special requirements for R32 units

Mounting the outdoor unit

Mounting the indoor unit

Piping installation

Electrical installation

6 Application guidelines

6.2 Setting up the space heating;cooling system

6.3 Setting up an auxiliary heat source for space heating

6.4 Setting up the domestic hot water tank

6.5 Setting up the energy metering

6.6 Setting up the power consumption control

7 Unit installation

7.1 Preparing the installation site

7.3 Mounting the outdoor unit

7.4 Mounting the indoor unit