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Ecodan & MelCloud scheduling

DavidAlgarve · 2025-08-22T09:49:01Z

Could someone remind me of any interaction between any "Timer" settings on MelCloud and "Schedule" timer settings on the Ecodan FTC6. E.G. Do MelCloud timer settings control the full ASHP on/off, or can it control heating and/or DHW? If I make a setting on one (e.g Ecodan) should it show on the other (e.g. MelCloud)? My primary scheduling has been done on the FTC6, but with strange events occurring, I am wondering if I should set up MelCloud with the same data

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Air Source Heat Pumps (ASHPs)

Last Post by downfield 3 months ago

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Mars

(@editor)

Illustrious Member Admin

Joined: 6 years ago

Posts: 4809

02/09/2025 3:27 pm

Posted by: @davidalgarve

↑

@editor I have been using it for a heat pump since 2022 and don't recall any significant changes. I also use it for an air conditioning unit and that is much superior in the logic and the options available.

When I interviewed Mitsubishi Electric at Installer earlier this year they said the final amendments were being made to a full consumer overhaul of Melcloud and the installer version was already done.

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downfield

(@downfield)

Estimable Member Member

Joined: 2 years ago

Posts: 147

25/05/2026 11:41 am

With the prospect of warmer weather this week, I brought forward the start of the Summer season on our MELcloud app to 22 May (Friday). We have the HP set to "Cooling" during the summer, with a target max IAT of 24C.

Since Friday, this change has been ignored, and MELcloud has continued to follow the previous "Spring" schedule, which has heating set to an IAT of 20C during the day (lower overnight).

I have manually overcome this by selecting "Cooling" on the FTC6 wall controller, set to flow temperature of 16C. This works OK until the scheduled time of next change in the Spring schedule - this was at 1000 and 2200 - when it flips back into heating mode again.

I've checked and rechecked the settings on the MELcloud app and all seem to be correct. It's like summer never existed!

What am I doing wrong?

Mitsubishi Zubadan 14kW with Mixergy 210l DHW in 220m2 barn property. 24 solar panels = 9kWp with GivEnergy 5.0kW Hybrid inverter and 19kWh GivE batteries. Jaga Strada fan-assisted rads throughout. Landvac vacuum glazing/triple glazed windows.

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