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Gary
@gary
Member
Honorable Member
2649 kWhs
Joined: Feb 8, 2023
Last seen: Mar 11, 2025
Profile Activity
Topics: 1 / Replies: 304
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RE: hum/whine from Wilo circulation pump

@grumpidoc I would still go into the menu when its running and check what the pump speed is set to and what the flow rate is, then you will have that ...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

@ngillam No way to control defrost cycle, but that isn't your issue it only increased 5C in 30 mins before the defrost started that isn't normal, its ...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan ASHP general set-up and efficiency

@ngillam Mine performed the same as normal hw took an hour to get to temp which is typical, hw shouldn't struggle to get to temp so something isn't...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: hum/whine from Wilo circulation pump

From your quote here I understood that the heat pump wasn't operating at night as you have the house quite cool. In the documentation you got from yo...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: hum/whine from Wilo circulation pump

@grumpidoc do you have glycol in your system if so you can deactivate the frost protection mode so the pumps won't activate at night.

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan stuck on immersion symbol

Ideally you want it all to come on at the same time. When my hall thermostat calls for heat all of the UFH loops downstairs come on and all the rads ...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan stuck on immersion symbol

Yep that all makes sense the easiest solution is to remove all the actuators from the UFH manifold they should just unscrew them all loops will be ope...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan stuck on immersion symbol

So presumably the EPH thermostats are wired back to a controller near to the UFH manifold? Do you have a picture of that?

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan stuck on immersion symbol

That will be the cause then, with only 1 thermostat calling for heat the water volume is too small it heats quickly and the heat pump has to turn off ...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan stuck on immersion symbol

That’s definitely cycling do you have UFH or rads regardless of which it would suggest you have only a very small proportion of the heating system cal...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi Ecodan stuck on immersion symbol

They could be defrosts but unlikely at that Frequency. do you have the MELCloud app that can show the flow and retune temps for those times? There...

2 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Analysing MELcloud heat pump graphs

It’s an 8.5kw ecodan UFH and rads. WC set at 32C at 3C, 45C at -10C. Running on weather comp with thermostat set to 22C in the hallway. Once it g...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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