HC_15_param Param15_03_fan1_Q, fan level to RPM

[Suedschwede66]

I did a comparison with my EPRA18. The heat pump has 12 fan speeds with a speed range of 475-750 rpm, which is a 25 rpm increment.
My heat pump is currently running at fan speeds 0, 3, and 8, which corresponds to a speed of 0 = off, 3 = 525 rpm, and 8 = 650 rpm.
The rest would then work out as follows.
0 = Off
1 = 475 rpm
2 = 500 rpm
3 = 525 rpm
4 = 550 rpm
5 = 575 rpm
6 = 600 rpm
7 = 625 rpm
8 = 650 rpm
9 = 675 rpm
10 = 700 rpm
11 = 725 rpm
12 = 750 rpm
Could this be implemented in P1P2MQTT?

[Arnold-n]

@Suedschwede66 thanks for the encoding info - just implemented this in v0.9.58rc19, renamed entity to Fan_RPM in HC_Mode. I am pretty sure this is not correct for other models, my EBLA uses a different encoding for the fan RPM. If anyone has info on their RPM values, I'd be interested so we can add more encodings.

[Suedschwede66]

Looks good, thanks.

[Rablet]

I have an EDLA04 and it appears the fan value is incorrect - fan off is displayed as 425 RPM and it appears to max out at 2000 RPM.

Is there a way of finding the raw numbers somewhere, maybe in the MMI so I can provide a mapping?

[Arnold-n]

Thanks for your feedback, @Rablet.

Fan_RPM is calculated as (v ? 450 + 25*v : 0). v is a signed 16-bit integer parameter nr 3 communicated in packet 400015. It seems your unit uses v = -1 instead of v = 0 for off, I'll fix the calculation accordingly.

But strange that it maxes out at 2000, a 16-bit signed integer can represent much higher fan speeds.

[Rablet]

Thank you! From the datasheet (https://checkout.mkm.com/content/products/pdf/24843/daikin-edla06ev3-6kw-low-temp-monobloc-air-source-heat-pump-r32-unit-l048868_TechData_1.pdf) it appears the fan motor is a KFD-325-77-10A with 10 steps and a "heating nom. RPM of 620", whatever that means.

Since the interface includes the fan speed data I assume it must be available to view somewhere, but I can't seem to find it or I could also share what the official Daikin system says the current speed is vs what the P1P2 Bridge says. Any idea where I might be able to find this?