M550344

Thanks for your feedback. There is definately a setting issue here for HW that is preventing ASHP from heating HW when temp is 0C or below. Time for more reading

I am new to this forum as well as using a ASHP and I am hoping someone may know the answer for an issue i am experiencing with our installation. I have a Daikin Altherma EDLQ07CAV3 and a Daikin 250l HW tank that was installed in Jan 2023. What we are experiencing is that during cold weather spells e.g 0C or below the ASHP stops heating the HW and we are reliant on having to use the immersion to maintain the HW tank temperture. CH is not an issue and is working as expected. As an example, normally the ASHP will maintain HW at around 45C day and night, but when we have low temperture days the ASHP will not heat the HW and the tank will lose heat over time until we use the immersion to re-heat the water. Octopus who installed the ASHP have yet to resolve the issue, including getting the disinfection cycle to work, as the ASHP cannot heat the HW beyond 48C, and it will just sit in disinfection mode trying to get to 60C until the system gives up and reports that it could not complete the cycle. As an example disinfection is scheduled to come on at 4:00am in the morning targeting 60C for 30minutes when no other demand is expected. When it attemped to carry out the cycle yesterday and again today, during the cycle the HW tank actually dropped in temperture, and between 4:00am-7:00am at no time did the ASHP attempt to heat the HW e.g remained off the whole time. Eventually I cancelled the cycle as it was clear it was not going to work. There is definately a correlation between HW heating not working and cold tempertures, but as yet the issue has not been resolved. Would appereciate any guidance forum members maybe able to contribute.🙂