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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Jul 30, 2025
Topics: 17 / Replies: 2066
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RE: Adding auto-adaption to a Midea heat pump controller

Good point - that's why I posted the code before running it, greater minds than mine can see the cracks and flaws. Maybe the key thing here is the che...

2 years ago
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RE: Adding auto-adaption to a Midea heat pump controller

Spotted some typos, hence the three edits for the OP. There may be others...

2 years ago
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RE: Heat pumps and on/off working - starting to quantify it

Those emoncms charts continue not to impress (at least for me). The colours are hard to distinguish (and I am not colour blind so far as I know) but e...

2 years ago
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RE: Real world connection to a heat pump over modbus

Part 2: Detailed Hardware Specification One of the problems that I had was that I was not familiar with the types of hardware I needed. I would know...

2 years ago
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RE: Real world connection to a heat pump over modbus

As long as we trust it as a valid reading, the modbus LWT is the LWT, ditto for the RWT and flow rate (all on the primary circuit side, as measured by...

2 years ago
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RE: Real world connection to a heat pump over modbus

Zooming in is again perhaps helpful. This is midnight to 2am last night, and although there is cycling, the average LWT does seem to be about 33 degre...

2 years ago
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RE: Real world connection to a heat pump over modbus

Yes, I have a PHE, but no buffer, standard Freedom Heat Pump setup. As we have since discovered, they don't know whether a PHE is a 'warranty requirem...

2 years ago
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RE: Real world connection to a heat pump over modbus

@derek-m - thanks, I have downloaded it and will see how I get on. I'm also going to tweak the WC curve a bit, probably start by lowering the right ha...

2 years ago
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RE: Real world connection to a heat pump over modbus

And the formulas - still trying to get my head round them, and I am no stranger to spreadsheets. It looks like you imported the data from the Midea...

2 years ago
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RE: Real world connection to a heat pump over modbus

OK, I think I get it (col D is confusing, because the header only has COP/LWT), but the numbers still don't reflect reality eg (from the zoomed in cha...

2 years ago
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RE: Real world connection to a heat pump over modbus

I've just zoomed in on the frequent cycling (from 0000 to 0200 this morning), and close up, it doesn't look too bad: It's 'only' cycling twice...

2 years ago
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