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HarriUp
@harriup
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Joined: Nov 25, 2021
Last seen: Jun 28, 2025
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Topics: 1 / Replies: 107
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RE: Mitsubishi Ecodan Fails to Heat Water despite temperature drop

@m1kegibson If you are able to access the service menu settings and navigate to the thermistor readings, I suspect you may find the answer as to wh...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan consuming 100kwh per day in new build!!!

@anca1808 I'd certainly backup the suggestion from @rhh2348 to check the consumption as measured by the unit - I know it is the main culprit in your h...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan 8.5kW Monobloc (FTC5) Defrost Mode

Thanks @abernyte - I remember seeing this video before, the technicalities are still beyond me but the general idea is useful to understand. Like...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

@clockworks Looking at your flow temperature graphs, the rise before the pump stops is not particularly big. You could try this: Under Operation set...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan with FTC7 controller DHW schedule

The default setting is that the DHW is always 'on' but actually runs when the tank temperature drops below the max temp drop value. To force the DHW t...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

"cycling is bad" - cycling can either indicate the inevitable result of the heat demand falling below the heat output of the pump or it can be a failu...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan 8.5kW Monobloc (FTC5) Defrost Mode

For clarity: The only reference to system volume I can find in the documentation I have relating to my EcoDan refers to the space heating circuit. The...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan 8.5kW Monobloc (FTC5) Defrost Mode

@alsocold123456 Only the primary circuit runs during the defrost cycle so shouldn't be taking heat out of the water sitting in the secondary heating ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best temperature wave form for best economy and efficiency .

Amps - yes, you did say. Not the most useful measure to have graphed though!To your examples:Lets say 34 is the temperature at which the radiators to ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best temperature wave form for best economy and efficiency .

I think this might be a different set of parameters for the user to interact with than the typical uk/european ones. That lower green line I commented...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Can you work an ASHP too hard?

As someone with an over-sized HP and the lower level of performance this entails for much of the year this strategy has a lot of appeal! I have a good...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best temperature wave form for best economy and efficiency .

I find the graphs somewhat hard to reconcile against the references to 31 or 32 @ 3° ambient as in both the flow temperature seems to be targeted at t...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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