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Ecodan UD 0-0 error
 
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Ecodan UD 0-0 error

 
Air Source Heat Pumps (ASHPs)
Last Post by Gary 2 hours ago
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 Gary
(@gary)
Prominent Member Member
Joined: 2 years ago
Posts: 343
Topic starter 04/05/2025 5:40 pm  

Hi all

Anyone ever had a UD0-0 error on a Mitsubishi Ecodan.  Google wasn’t very helpful.  It’s doing it intermittently and shutting off the heat pump.


   
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SUNandAIR
 SUNandAIR
(@sunandair)
Noble Member Member
Joined: 2 years ago
Posts: 488
04/05/2025 7:07 pm  

Hi Gary, haven’t seen full numbers on your error code but UD appears to be an overheat protection code. 

You could also do an Info request… like the flow rate enquiry. or, in this case, an error history enquiry. 

Enq code 103 is last error

Enq code 104 is second to last error

Enq code 105 is third to last error 

I don’t know how these enquiries would be displayed.

but hope this helps

This post was modified 2 hours ago by SUNandAIR

   
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 Gary
(@gary)
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Joined: 2 years ago
Posts: 343
Topic starter 04/05/2025 7:25 pm  

Thanks it doesn’t provide anymore info just says UD-0


   
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