Daikin Altherma EAVX-D9WG User Manual (English)

Questions and Answers:

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phillipreynoldsAug 19, 2025
What to do if the backup heater operation is not activated in Daikin Altherma EAVX-D9WG?
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  Mary GonzalesAug 19, 2025
  Check and make sure that: * The backup heater operation mode is enabled. * The backup heater overcurrent fuse has not been turned off; if it has, check the fuse and turn it back on. * The thermal protector of the backup heater has not been 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.
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Amy JohnsonAug 22, 2025
What to do if the pressure relief valve opens in Daikin Altherma EAVX-D9WG Air Conditioner?
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  Jennifer MillerAug 22, 2025
  The pressure relief valve might open because: * The expansion vessel is broken: Replace the expansion vessel. * The valve of the water circuit towards the expansion vessel is closed: Open the valve. * The water volume in the installation is too high: Make sure that the water volume in the installation is below the maximum allowed value. * The water circuit head is too high: Check the installation requirements. The maximum water circuit head is 10 m.
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Jennifer HerreraAug 25, 2025
What to do if the pump is making noise in Daikin Altherma EAVX-D9WG?
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  alyssawestAug 25, 2025
  The pump in your Daikin Air Conditioner might be making noise because: * There is air in the system: Purge air manually or use the automatic air purge function. * The water pressure at the pump inlet is too low: Check and make sure that the water pressure is >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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miguelrichAug 26, 2025
What to do if the water flow is too low in Daikin Altherma EAVX-D9WG?
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  Alexander SawyerAug 26, 2025
  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, either manually or using the automatic air purge function. * The water pressure is >1 bar. * The expansion vessel is NOT broken. * The valve of the water circuit towards the expansion vessel is open. * The resistance in the water circuit is NOT too high for the pump.
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castillojamesAug 28, 2025
What to do if the system is making gurgling noises after commissioning Daikin Altherma EAVX-D9WG Air Conditioner?
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  Kimberly WallaceAug 28, 2025
  The gurgling noises in your Daikin Air Conditioner system might be caused by: * Air in the system: Purge air from the system. * Various malfunctions.
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Michele CostaAug 30, 2025
How to fix failing or blocked pressure relief valve in Daikin Air Conditioner?
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  lgalvanAug 30, 2025
  Flush and clean the complete tank including the piping between pressure relief valve and the cold water inlet and replace the pressure relief valve.
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rachelwadeSep 1, 2025
What to do if the unit must start up out of its operation range in Daikin Altherma EAVX-D9WG?
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  Isabel SanchezSep 1, 2025
  If the water temperature is too low, the unit uses the backup heater to reach the minimum water temperature first (15°C). Check and make sure that: * The power supply to the backup heater is correctly wired. * The backup heater thermal protector is NOT activated. * The backup heater contactors are NOT broken.
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Nicholas GrantSep 3, 2025
What to do if there is air in the Daikin Air Conditioner system?
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  Eric RobbinsSep 3, 2025
  Purge air from the system.
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jeremysmithSep 5, 2025
What to do if various malfunctions occur in Daikin Altherma EAVX-D9WG Air Conditioner?
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  kevin65Sep 5, 2025
  Check if or is displayed on the home screen of the user interface.
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Anna RiveraSep 8, 2025
What to do if the water volume in the installation is too low in Daikin Altherma EAVX-D9WG Air Conditioner?
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  Laura SchwartzSep 8, 2025
  Make sure that the water volume in the installation is above the minimum required value.