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RE: Daikin Short Cycle Query  

By Ubert767, 6 days ago

  Here is an expanded view of this morning's plot. I was wondering if the spikes are the result of the inverter doing its thing? I haven't yet checked on the compressor's state during this period. At...
RE: Testing new controls/monitoring for Midea Clone ASHP  

By Tasos, 6 days ago

  @cathoderay Are registers accessed by the address indicated in Midea's Modbus mapping table ? Because I found the actual address is +1.
RE: Grant 13kW Aerona3 - issues getting zones to temp  

By Crimson, 6 days ago

    Thanks will do. Don’t expect a huge uplift in temps but looking at the at the app its clearly dropping and dropping. The WC we ensured was same as before.   I’d expect rooms that weren’t a...
RE: Testing new controls/monitoring for Midea Clone ASHP  

By benson, 6 days ago

  @cathoderay and @mosibi thanks. A bit to get my head around there- but yes that mostly makes sense. I must admit when I was using chatgbt to set up the helpers (which seem like a great feature btw) I ...
RE: Grant 13kW Aerona3 - issues getting zones to temp  

By JamesPa, 6 days ago

  OK, couple more questions At these relatively mild temps, how certain can you be that its not just a WC setting problem that would be resolved by leaving the cold OAT end of the curve where it is but ...
RE: Daikin Short Cycle Query  

By JamesPa, 6 days ago

  Hmm   The spikes are very short (so quite possibly very little energy and thus of little significance) but too low to be just the water pump. It would be useful to look at a couple of them expan...
RE: Grant 13kW Aerona3 - issues getting zones to temp  

By Crimson, 6 days ago

    Thanks James. Am back Sunday night. Will put probes in. I do have probes on the 4 ports of the LLH, neglected to take a photo as the heating cycle didn’t even happen lol. Genuinely can’t fathom...
RE: Testing new controls/monitoring for Midea Clone ASHP  

By Mosibi, 6 days ago

  @benson”Active State” reflects the current state of your heat pump. And indeed the state of the 3-way-valve SV1 is taken into account to get the state. The current possible states are “inactive”, “hea...
RE: Daikin Short Cycle Query  

By Ubert767, 6 days ago

  @jamespa Thanks for your response. There is no buffer, LLH, secondary pump or indoor thermostat. The system is running weather compensation and fully open loop and I've calculated the system volume t...
cathodeRay RE: Testing new controls/monitoring for Midea Clone ASHP  

By cathodeRay, 6 days ago

  For what it is worth, here (with some background explanation of how the registers work) is how you read the bit value for the three port two way valve (SV1) in python, where 0 = space heating and and ...
RE: Daikin Short Cycle Query  

By JamesPa, 6 days ago

  I would say yes. Have you got a buffer/LLH and secondary pump. How is is set up (thermostat? Weather compensation?). Are your emitters completely open (no TRVs or TRVs set to max no Zone valves or ...
RE: Grant 13kW Aerona3 - issues getting zones to temp  

By JamesPa, 6 days ago

  You are doing a splendid job of cornering the installers, well done.   I have a couple of comments which may or may not help Just to add one more thing - there are no surprises in any of the ab...
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