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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Dec 3, 2025
Topics: 19 / Replies: 3588
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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. ...

3 days ago
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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...

3 days ago
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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...

3 days ago
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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...

3 days ago
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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 ...

3 days ago
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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...

3 days ago
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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!

3 days ago
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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...

4 days ago
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RE: Hitachi Yutaki SCombi Heat Pump - Owners

  OK. The interesting thing is that the heat pump is still in DHW mode, which presumably means that the controller thinks the job isnt finishe...

4 days ago
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RE: Hitachi Yutaki SCombi Heat Pump - Owners

OK, how do you know its reached the set temperature, and does it continue to heat the DHW at an elevated flow temp (and thus overshoots the DHW set te...

4 days ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Its not so much challenging as seeking to understand. Your house cools very slowly so provided that the right amount of energy is put in over several...

4 days ago
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