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Sim0n0
@sim0n0
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Joined: Nov 26, 2025
Last seen: Jan 12, 2026
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Topics: 0 / Replies: 26
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

I’ve noticed their graphics are a bit odd in places. I would ignore  

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

 

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

-3 overnight. Mine appears to defrost every 45 mins

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

Currently 2° here. I’ll try and get some defrost numbers to compare  

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

That's great news! I hope it works out well  

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

@jamespa Apologies I did know that but I seem to have replied to the wrong post

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

@jamespa I’ve re read through the instructions a I can’t see anything in the DIP switch settings relating to Thermo off or hysteresis. My system doesn...

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

@jamespa Why does he need any hysteresis? Just set the heat pump to 20 and it will go as low as it can. I’d have to check but I think mine will get do...

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

@jamespa Yes it cycles a lot. In fact I smile when it’s -3 outside knowing that my heat pump is working efficiently - a couple of days a year LOL. I d...

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

@jamespa I’d need to read back through the manual but I don’t use the 4 degree Thermo off. If I’m honest I don’t even remember what that is. I doubt i...

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

My issue is an oversize 11kW heat pump and a poorly designed UFH. My house gets too hot made worse by solar gain from large south facing windows My ...

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

May not be relevant but my Hitachi system was a ‘package’ supplied by Freedom Heat Pumps. This included a buffer, several mixing valves and Heatmiser ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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