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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jan 13, 2026
Profile Activity
Topics: 20 / Replies: 3926
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Simon thanks. If you have the time perhaps you could look at the past 2 pages of posts. Essentially OP is operating his heat pump on a fixed flow ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Flow rate discrepancy between ASHP and manifold

Air release valves dont always work! You are gonna have to do some experiments if you want to know more, like closing loops down and seeing if that ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Fair enough. I recommend quizzing him to get your money's worth!  

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Wow thats a lot, I think Id be flipping the dips myself! I hope it all works out in the end. It should but as previously stated I cant guarantee. ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

  That all sounds good. Basically two switches to flip. Will the engineer visit for free? Its going to take all of 10mins including taking o...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Replacing my 18 month old Hitachi Yutaki ASHP

@jamespa Looking at setting up the weather compensation. I know from the building that 32C is fine for temperatures below 0C and 5C. But don’t k...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

I dont think it tells us anything else other than the time it takes constant for getting the slab to equilibrium at the specific flow temperature (whi...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help…my NIBE heat pump has faulted again!

If it happens only when it gets cold then it maybe that the heat pump tries to increase flow rate at lower outside temps/higher flow temps, and fails ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Flow rate discrepancy between ASHP and manifold

Hmm. What do sensors do if you close 1 or 2 loops down. Does that give a clue. Tbh, apart from faulty sensor, I can't see what this is. Maybe othe...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Flow rate discrepancy between ASHP and manifold

Have you got a buffer tank, low loss header or plate heat exchanger between ashp and manifold? If so there could genuinely be different flow rates!

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Owners

. It does but, unless there has been a firmware update, it cant be a controller fault, suggesting its a wiring, connection or valve fault. But that...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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