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Gary
@gary
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Prominent Member
Joined: Feb 8, 2023
Last seen: Aug 13, 2025
Profile Activity
Topics: 2 / Replies: 348
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Reply
RE: Mitsubishi Ecodan Fails to Heat Water despite temperature drop

Its the flow temperature for the heating circuit, it means its running a fixed flow temp and is not on weather compensation, get that changed come the...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi Ecodan Fails to Heat Water despite temperature drop

@m1kegibson Apologies if I'm teaching grandma to suck eggs but have you confirmed the max temp drop in the controller is set to 10C? To do that you h...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan UD 0-0 error

Hi it’s 6 years old first issue it’s ever had.The sensor is cheap £33 it’s the HVAC engineer cost £305 plus VAT

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan UD 0-0 error

£400 later and it’s fixed it was the T3 sensor that measures the condensed refrigerant temp it should read single figures was reading 65C and occasion...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan UD 0-0 error

@editor thanks Mars that’s the same table I found in the service manual it’s does feel like it’s the sensor that’s at fault. When it stopped it was r...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan UD 0-0 error

@editor I found some info in the service manual it could be a bad condensing temperature or pressure sensor. It shuts down the heat pump if condensi...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan UD 0-0 error

@editor thanks Mars just waiting for support to open at 8am

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan UD 0-0 error

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

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Ecodan UD 0-0 error
9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 13
Views: 1923
Reply
RE: Yes, the "zoning with ASHP" topic again...

Where is the heat pump controller going that will be the thermostat it just needs to be in a sensible location. If you are running weather comp the ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help me understand my Mitsubishi Ecodan system

@robs Thanks that's what I suspected mine definitely doesn't have it.

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help me understand my Mitsubishi Ecodan system

@carpenterstation because heat pumps are built by engineers and have not been historically developed for the average human to be able to operate, henc...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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