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Gary
@gary
Member
Prominent Member
Joined: Feb 8, 2023
Last seen: Jun 20, 2025
Profile Activity
Topics: 2 / Replies: 346
AllTopicsReplies
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

1 month 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...

1 month 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...

2 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...

2 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

2 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

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Ecodan UD 0-0 error
2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 13
Views: 425
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 ...

2 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.

2 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...

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

@carpenterstation Yep that looks all normal, if you want to turn the heating off and leave the hot water on then you have to do it from the controller...

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

@robs Is this only in the newer controllers I don't have that option on my FTC5

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
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