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Daikin Short Cycle Query

 
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Air Source Heat Pumps (ASHPs)
Last Post by RadWhisperer 6 months ago
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 TreeWizard
(@treewizard)
Active Member Member
Joined: 6 months ago
Posts: 9
09/11/2025 7:49 pm  

I've also got an 8kw Daikin, in the last week I've noticed it oscillating between 350-600W at quite a high frequency for longer periods.

Is there some explanation for why it might be ramping up and down every minute?

daikin em 1
daikin em 2
daikin em 3


   
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 ASHP-BOBBA
(@ashp-bobba)
Honorable Member Member Professional Installer
Joined: 1 year ago
Posts: 444
09/11/2025 10:24 pm  

@treewizard is this not the electrical pulse that keeps the compressor warm? most of these top end builds use around 1kW per day in the winter to either power a heater tape wrapped around the compressor or send a current to the windings that does not move the motor but keeps it warm and I would imagine Daikin does one of these? (I not an expert on Daikin ASHP)

 

 


This post was modified 6 months ago by ASHP-BOBBA

AAC Group Ltd covering the Kent Area for design, supply and installation of ASHP systems, service and maintenance, diagnostics and repairs.
Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.


   
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 TreeWizard
(@treewizard)
Active Member Member
Joined: 6 months ago
Posts: 9
11/11/2025 10:40 am  

@ashp-bobba That would explain it thank you, I'll take a look at the manual.  If not, I'll ask Daikin at the next service.



   
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 RadWhisperer
(@radwhisperer)
Eminent Member Member
Joined: 6 months ago
Posts: 35
12/11/2025 8:53 am  

Just a suggestion but upload your images to an AI agent such as Grok with a full description of your installation and you will get a good description of the symptoms and some suggestions of things to check. I've used this method to dial in my 4KW Daikin when switching to "pure" weather comp.



   
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