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Struggling to get CoP above 3 with 6 kw Ecodan ASHP

 
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Air Source Heat Pumps (ASHPs)
Last Post by Travellingwave 31 minutes ago
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 Travellingwave
(@travellingwave)
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Joined: 3 years ago
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22/02/2026 5:41 pm  

I looked at the trend in the link for booster - I see the booster on flag set but don’t see any corresponding rise in flow temp gets- makes me think you may not physically have a booster but the option might be enabled on the FTC. Or like me with my immersion heater - you have one but the power to it is switched off. I have noticed with the immersion heater that if the Ecodan decides to switch it on - and does not see any rise in temp it kind of gets into a death loop and just sits there with the immersion symbol (lightning bolt) on the screen but does not then attempt to to restart the heatpump - so you wake up to a cold shower. Could be the booster heater has a similar logic??


This post was modified 2 hours ago by Travellingwave

   
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 Travellingwave
(@travellingwave)
Trusted Member Member
Joined: 3 years ago
Posts: 28
22/02/2026 5:50 pm  

Could do to know what control mode you are using - weather comp or Auto adapt - from your trend looks like you are using weather comp but I’m not too familiar with MelPump App.



   
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 Travellingwave
(@travellingwave)
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Joined: 3 years ago
Posts: 28
22/02/2026 7:00 pm  

And a picture of cylinder and surrounding pipe work would help.

 



   
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