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JamesPa
JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 12, 2026
Topics: 27 / Replies: 5227
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Understood, its your house and your heat pump so take all the time you need. I will respond to queries but otherwise wont post again until I hear fro...

9 months ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

OK noted, although I dont think any of the charts posted show this. This one definitely seems like human intervention not defrost because of when the...

9 months ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Ah that makes sense. I think 'off' is actually 'setback' rather than truly off, which is clearly what has happened, a 3C setback in the target flow t...

9 months ago
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RE: Electricity price predictions

@transparent All I can say is that I admire your optimism!  

9 months ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

No, the fact that flow temperature reduces by ~3-4 C during nighttime hours (I havent yet worked out the exact hours) regardless of whether defrosting...

9 months ago
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RE: Electricity price predictions

Nope, that doesn't work either. Apparently (according to the politicians and their supporters I spoke to on our local high street) climate change isn...

9 months ago
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

Sorry but I dont know. There must be something causing this timing so, if it matters, which I think it does, it needs to be found. If you think it d...

9 months ago
Reply
RE: Electricity price predictions

Really, bear in mind their policies. I think they will not care about evidence because it supports the ideology. So far as I can tell from a long di...

9 months ago
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

Something is causing this to occur and it must presumably be a setting. Somehow you will need to find it if its not to cause downstream problems &n...

9 months ago
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

  Pages 56 on in the manual. Somewhere you will find a heating schedule. You may not find an 'eco' setting, but setting the pump 'off' probab...

9 months ago
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

Setback is in the user menu - time clock/schedule or similar.

9 months ago
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