Changing the parameters or disabling the disinfection function of a Daikin Altherma heat pump

In order to save on my energy consumption, I decided to disable the disinfection function of my Daikin Altherma heat pump. By default this function is enabled to run once a week at Friday evening. The purpose is to heat up the hot tap water boiler to a preset temperature during a certain amount of time, so that bacteria that can start to live in your boiler will be cooked to death. When speaking to Daikin, they told me that this function could be disabled, as long as you use daily or very regular hot tap water by showering e.g.

To understand how much energy the disinfection consumed, click here.

Steps to disable the disinfection function

1. Change the user level to installer. Steps can be found here.
2. Press the Back button and Navigate to the Installer Settings (Installateurinstellingen) and press OK.

3. Navigate to Hot Tap Water (Warmtapwater) and press OK.

4. Navigate to Disinfection (Desinfectie) and press OK.

5. To disable the disinfection, select Disinfection (Desinfectie) again and press OK. When asked to disable the function, change Yes (Ja) to No (Nee) via the Navigate buttons. The confirm by pressing OK.

6. Press the Back button. You are being asked to restart the heat pump. Press OK to confirm. The display will reset itself and show a message Busy (Bezig) and restart itself. Note the wrench symbol that indicates that we still have installer as user level.

7. Now you have disabled the disinfection function. Alternatively, you could also change the parameters so that the function runs during the afternoon (instead of 11pm), when there's more heat in the air to exchange into water.