Daikin ERGA04DAV3A User Manual (English)

Questions and Answers:

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Michael MosleyAug 17, 2025
Why is my Daikin ERGA04DAV3A not sufficiently heating at low outdoor temperatures?
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  Antonio BrownAug 18, 2025
  If your Daikin Heat Pump isn't sufficiently heating the space at low outdoor temperatures, it could be due to several reasons: * The backup heater operation might not be activated. Ensure the backup heater operation mode is enabled. * The backup heater overcurrent circuit breaker might be off. Turn it back on if it is off. * The thermal protector of the backup heater might be activated. If it has, check the water pressure, whether there is air in the system, and the air purge operation, then press the reset button in the switch box. * The backup heater equilibrium temperature may not be configured correctly. Try increasing the equilibrium temperature to activate the backup heater operation at a higher outdoor temperature.
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Kimberly ClarkAug 20, 2025
How to check temperature settings on Daikin Heat Pump when it is not heating or cooling?
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  William RamirezAug 20, 2025
  If your Daikin Heat Pump isn't heating or cooling as expected, first check the temperature setting on the remote controller to ensure it's correct. The issue might stem from an incorrect setting.
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Theodore CobbAug 22, 2025
What to do if Daikin ERGA04DAV3A Heat Pump is not heating or cooling and water flow is low?
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  Gloria SmithAug 22, 2025
  If your Daikin Heat Pump isn't heating or cooling as expected, it might be due to low water flow. Ensure all shut-off valves of the water circuit are completely open, the water filter is clean, and there is no air in the system. Also, check that the water pressure is above 1 bar, the expansion vessel is not broken, and the valve towards the expansion vessel is open. Verify that the resistance in the water circuit isn't too high for the pump.
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Madison BennettAug 25, 2025
Why won't the compressor start on my Daikin ERGA04DAV3A Heat Pump for space or water heating?
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  Mackenzie FoxAug 26, 2025
  If the compressor in your Daikin Heat Pump isn't starting for space or domestic water heating, it could be because the unit is starting outside of its operation range, meaning the water temperature is too low. In this case, the unit uses the backup heater to reach the minimum water temperature first (15°C). Check that the power supply to the backup heater is correctly wired, and the backup heater thermal protector is not activated, and the backup heater contactors are not broken.
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William SnyderAug 27, 2025
Why is my Daikin ERGA04DAV3A Heat Pump system making gurgling noises?
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  Stephen HuertaAug 27, 2025
  If your Daikin Heat Pump system is making gurgling noises after commissioning, it could be caused by air in the system. Purge the air from the system. It can also be caused by various malfunctions. Check if or is displayed on the home screen of the user interface for more information about the malfunction.
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Jacob MuellerAug 30, 2025
How to fix a noisy pump (cavitation) in my Daikin ERGA04DAV3A Heat Pump?
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  Pamela LambAug 30, 2025
  If the pump in your Daikin Heat Pump is making noise (cavitation), it could be due to air in the system. Purge the air manually or use the automatic air purge function. Another possible cause is that the water pressure at the pump inlet is too low. Ensure the water pressure is above 1 bar, the water pressure sensor is not broken, the expansion vessel is not broken, the valve of the water circuit towards the expansion vessel is open, and the pre-pressure setting of the expansion vessel is correct.
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lauraconnerSep 1, 2025
What to do if Daikin ERGA04DAV3A is not heating or cooling and water volume is low?
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  Sarah SullivanSep 2, 2025
  If your Daikin Heat Pump isn't heating or cooling as expected, the water volume in the installation might be too low. Make sure that the water volume in the installation is above the minimum required value.
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Derek GonzalesSep 4, 2025
Why does the pressure relief valve keep opening on my Daikin Heat Pump?
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  Seth GreenSep 4, 2025
  If the pressure relief valve of your Daikin Heat Pump opens, it could be due to several reasons: * The expansion vessel might be broken. Replace it. * The valve of the water circuit towards the expansion vessel might be closed. Open the valve. * The water volume in the installation might be too high. Ensure it is below the maximum allowed value. * The water circuit head might be too high. Check the installation requirements.
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Kelly PierceSep 6, 2025
What to do if preferential kWh rate signal was sent by the electricity company and Daikin ERGA04DAV3A Heat Pump compressor does not start?
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  Stephen GrantSep 6, 2025
  If the compressor in your Daikin Heat Pump isn't starting for space heating or domestic water heating, it could be because the preferential kWh rate signal was sent by the electricity company. Wait for the power to return (2 hours max.).
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Danny WilkersonSep 9, 2025
Why is the water pressure unusually high at the tapping point of my Daikin Heat Pump?
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  Regina HayesSep 9, 2025
  If the pressure at the tapping point of your Daikin Heat Pump is temporarily unusually high, it could be due to a failing or blocked pressure relief valve. Flush and clean the complete tank, including the piping between the pressure relief valve and the cold water inlet, or replace the pressure relief valve.