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spacebiscuit
@spacebiscuit
Member
Active Member
Joined: Jun 12, 2024
Last seen: Nov 18, 2024
Profile Activity
Topics: 3 / Replies: 8
AllTopicsReplies
Topic
Recommended ASHP protection fluid products
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 1
Views: 1562
Topic
System pressure dropping on my Ecodan ASHP system
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 2
Views: 4049
Reply
RE: Ecodan U4 error code

Oh I didn't see that - so I'm getting 300-320 ohms on that thermistor....

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan U4 error code

On SW2 switches 1, 4 and 6 need to be on - this will then return a number corresponding to a thermistor. Although in my case it returned '3' which cou...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan U4 error code

I discovered that there are some dip switches (SW2) that can be set on the unit's controller board which will indicate the exact thermistor at fault. ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan U4 error code

I've cleaned that solder joint up and resoldered it, looks good now. But today no matter what I've tried the machine will not spin up. I've tried wigg...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan U4 error code

I found this on the board where TH4 (Thermistor Discharge) plugs. The rest of the solder joints look clean as can be seen on TH3. Does the joint l...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan U4 error code

Thanks - over the weekend I order a replacement power board which I switched out - didn't fix the issue. However after checking the thermistors for th...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan U4 error code

I spoke Mitsubishi on the phone - they just read back to me what I can find online. they want £292 just to come and have a look 🙂

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan U4 error code

Thanks yeah one of those Thermistors - I'm trying to figure out if my control panel is able to tell me which one exactly - a Youtbe video shows a guy ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Ecodan U4 error code
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 17
Views: 7340
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