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trebor12345
trebor12345
@trebor12345
Member
Estimable Member
Joined: Feb 26, 2024
Last seen: Apr 28, 2026
Profile Activity
Topics: 13 / Replies: 134
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Yesterdays run 8th Dec. Chart is showing flow temperature. The HP didn't like a set temperature of 29C. Very little on periods. Lots of temperatur...

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

I have been experimenting with different flow temperatures to help facilitate the setting up of WC. Todays run was the lowest temperature I have used...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant Aerona Short Cycling

I am so envious, your are so fortunate to have all of the data at your finger tips!!  

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

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

I didn't run the heating over night. Only just now switched on. All I can add on the defrost is that the refrigerant temperature does drop as it go...

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

@sim0n0 Thanks

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

@sim0n0 Thanks. Did you manage to get an evaporator temperature prior to defrost?

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

James. Yes I have turned off Night Shift.  

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

The outside temperature has tonight fallen to around 0C and I am now in trouble with defrosts. I am seeing just prior to the defrost, an evaporator ...

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

JamesPa Have you seen anything in the manual about how the defrost cycle works when there is: a power cut, thermal off, demand off, HP start up, etc?

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

Sim0n0 JamesPa Thank you.  

5 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 You will be please to know that this afternoon WE made the DIL switch change to give us a 2C Thermo OFF time. The change was easy, but stress...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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