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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Jun 1, 2026
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Topics: 18 / Replies: 2920
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RE: Testing new controls/monitoring for Midea Clone ASHP

You might be able to, have a look at address registers 201 to 208, in particular 204 (from the wired controller manual modbus table). Try reading it f...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Testing new controls/monitoring for Midea Clone ASHP

@tasos, please do try to concentrate. That is the opposite of what I said: "both [LWT and RWT] are still above the IAT so heat will still flow from th...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Testing new controls/monitoring for Midea Clone ASHP

The LWT does indeed become equal to the RWT towards the end of each cycle (taking a cycle as trough to trough) but it both are still above the IAT so ...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Testing new controls/monitoring for Midea Clone ASHP

We have pretty much established by direct observation that Midea R32 units (and perhaps R290 units, less data available) modulate at most OATs (anythi...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Testing new controls/monitoring for Midea Clone ASHP

It seems the R32 units tend to show this step pattern (mine certainly does) with a limited number of parking slots, the later R290 ones less so, but s...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Testing new controls/monitoring for Midea Clone ASHP

My auto-adapt script only makes infrequent changes. If the weather compensation, however achieved is where it should be, then most of the time the IAT...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Setback savings - fact or fiction?

This illustrates what I am getting at, even apparent steady states aren't really steady states. A building including its occupants, its immediate envi...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Midea R32 Monobloc MHC-V12W in 1989 Detached House: Noise from Pipes/Airing Cupboard, DHW Schedule Not Always Heating – Advice Needed?

@painter26 — they (the analogue gauges) are subtly different, also I can't see the units on yours (mine shows L/min) but most importantly the flow met...

3 months ago
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Air Source Heat Pumps (ASHPs)
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RE: Setback savings - fact or fiction?

I fully understand your reasoning, same steady inputs should produce the same steady output, but even with your two steady state samples there is cons...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Testing new controls/monitoring for Midea Clone ASHP

@benson — as @tasos suggests, plotting multiple variables can be very useful. Set LWT, actual LWT, RWT, OAT and IAT on one chart gives a comprehensive...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Testing new controls/monitoring for Midea Clone ASHP

The way I see it, it is weather compensation, but done through custom code, rather than using the Midea internal control logic. Again as I see ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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