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raomin / ESPAltherma

Monitor your Daikin Altherma / ROTEX heat pump with ESP32
MIT License
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Power usage during defrost operation #69

Closed niekveldhuizen closed 2 years ago

niekveldhuizen commented 3 years ago

Hi,

I have build my ESPAltherma with an M5StickCPlus, everything is working as it should. But now it is getting colder and the unit starts more defrost cycles during heating.

When the defrost start the primary inv current drops to 0, but in my P1 meter i can see that is peaks from 4Kw up to 9kw. Defrost cycle takes about 5 min. But it is not counted in my total for the day for the heatpump. How can i achive this?

KalaNagHTD commented 3 years ago

These are the data my unit logs during defrost. The ext. heat exchanger reaches 25°C and the compressor consumes about 200W. At the beginning and the end of the defrost cycle the compressor comes to a stop.

EA6C39C4-FC6B-4F52-AFD4-2E88F3F7311E

niekveldhuizen commented 3 years ago

I use Home Assistant to log everything. I used my P1 data to measure the kwh spent during the 4/5 minutes of defrost and i averages about 0.4kwh for a defrost cycle. But the primary inv (A) does not reflect this so my logging for the usage of the heatpump total kwh for the day is missing the defrost cycle

KalaNagHTD commented 3 years ago

The elecrical power shown in my graph is calculated from primary current. So something is wrong with your primary current data…

niekveldhuizen commented 3 years ago

Yeah i dont know. the normal heating proces is registerd just fine. It looks like the defrost is is not using the primary inv. But somtething like the heating element in the DHW tank (that is 9kw) but i do not se a register for that value

KalaNagHTD commented 3 years ago

Defrost MUST use the compressor. Otherwise it wouldn‘t work at all.

raomin commented 2 years ago

I'll close this one. Open a discussion if still not clear