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RadWhisperer
@radwhisperer
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Joined: Oct 19, 2025
Last seen: Jun 11, 2026
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Topics: 0 / Replies: 35
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RE: Daikin 8kw Monobloc not switching off when room thermostat exceeds set point

You can try adjusting the Modulation & Overshoot settings in the MMI to start with. Enter installer mode to adjust these.

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Humidity, or lack thereof... is my heat pump making rooms drier?

My 2 bed mid-terrace definitely dropped consistently after the heat pump was installed. Previously, because I still have single glazing, I used a smal...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Crumbling exterior insulation ASHP

Plus the pipe is in contact with the ground so it's a cold/moisture bridge and needs to be lifted or at least an air gap created underneath.

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin MMI attached to hot water cylinder.

If it's accessible then it should be fine. The cylinder won't get even warm on the outside. Mine is in the loft which was annoying for about 3 weeks...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Daikin MMI attached to hot water cylinder.

If it's accessible then it should be fine. The cylinder won't get even warm on the outside. Mine is in the loft which was annoying for about 3 weeks...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff

I found because I have very low heat loss I can set back the temp by only 1C during the higher rate periods because the Daikin overshoots 1-1.5C regar...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Advice on internal circulation pump noise

Three things that caused noise in my system after commissioning. Volumiser was gurgling which just turned out to be the air bleed valve not open. ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Defrost behaviours

@georgea You system isn't too different from mine. I don't have UFH and my house is a 2 bed mid-terrace so maybe a bit smaller. Heat loss 3.3 @ -3C...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Defrost behaviours

Slight correct to the above defrost behaviour as the fan only ramps at the beginning and end of the cycle. The bit in the middle is when both the wate...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Defrost behaviours

ASHP Model: Daikin Altherma 3M 4KW House loss: Calculated 3.3 at -3C, definitely overestimated though. Control mode: Weather Comp + Thermostat wit...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: A2A vs A2W: Which Heat Pump Would You Pick?

With existing rads it seems easier to just install A2W. I've seen some larger houses with multiple internal A2A units have pipework running all over t...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Maintaining temperature on windy day

Valiant & Daikin have a form of load compensation or room influence which can dynamically adjust the WDC by a few degrees based on what thermostat...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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