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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...

6 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...

6 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

7 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...

7 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...

7 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...

7 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

7 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

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Ecodan UD 0-0 error
7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 13
Views: 1573
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 ...

8 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.

8 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...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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