Wrong voltage and pressure

[rayxxxxx]

First of all, @raomin, Wonderfull job!!! I installed ESPAltherma in my Altherma 3 H HT ECH2O and it works. But there are some wrong data (I think). 0x21,4,101,2,-1,"Voltage (V)" give me a value higher than it can be. ESPAltherma reads values between 450 and 500 but it should be 230-250. I've got a Shelly EM and it returns 245 V. I tried 0x21,2,101, however that returns always 0. {0x20,14,105,2,2,"Pressure"}, {0x62,11,105,1,2,"Water pressure"}, {0x62,15,105,2,2,"Pressure sensor"} never return 2.3 bar. Can you help me?

Daikin Models: ETSX16P50D, EPRA14DAV3 ESPAltherma with M5STickCPlus (Default.h or ALTHERMA(HPSU6_ULTRA).h)

[raomin]

Hi @rayxxxxx, thanks for your support (and the beer :)) Some models do not have a voltage sensor (you'll find previous issues on this) (just put 245 in you CoP calculation). But I recall no one without a pressure value... Have a look here https://github.com/raomin/ESPAltherma/wiki/Information-about-Values and try all other "pressure" values.

[stomko11]

I wonder about that pressure to. I have manometer on the heatpump that shows 1 bar pressure (that is pressure in circuit - water heating or DHW). Is that the pressure we are talking about? Also, heatpump does not show that value (or any other pressur value) in control unit. I tried querying all the values, neither returns values around 1 or 14,5 which would be equivalent in PSI.

TESTP1-High Pressure: 10.7
TESTP2-High Pressure(T): Conv 405 not avail.
TESTP3-Low Pressure: 8.6
TESTP4-Pressure sensor: 8.6
TESTP5-Pressure: 8.6
TESTP6-Low Pressure(T): Conv 405 not avail.
TESTP7-Pressure sensor(T): Conv 405 not avail.
TESTP8-Pressure(T): Conv 405 not avail.
TESTP9-Water pressure: 0
TESTP10-Refrigerant pressure sensor: 0
TESTP11-Pressure sensor: 0
TESTP12-Refrigerant pressure sensor: 0

[raomin]

I will code the 405 converter so you can see the missing values

[stomko11]

Thank you. Then I should be able to see the pressure?

[raomin]

You will get some values where there is "Conv 405 not avail.". Not sure that will be the right value...

[raomin]

I looked at the 405 converter, it basically gives the temperature of the refrigerant gaz (eg R32) in the compressor. So not what you're looking for. But I coded it anyway.

The water pressure should be on this value: {0x62,11,105,1,2,"Water pressure"}, It's a registry that is constant on 18 definition files. So I'm pretty sure it's the right one. Could be that you have a defective pressure sensor on the HP... Do you see a coherent value on the user interface of the HP?

[rayxxxxx]

The user interface of the HP shows 2.2 bar and it's a coherent value (I think, I'm a simple user).

[stomko11]

@raomin no, my heatpump does not show any pressure values anywhere in the user interface. I only have analogue manometer that shows the pressure.

[raomin]

Then it is most probably not monitored and the reason why water pressure returns 0... Sorry

[stomko11]

@raomin I only got to it now, and actually realized I can see pressure value in your readings {0x20,14,105,2,2,"Pressure"}, This shows now 12.5 which is in PSI, and I have been looking for value corresponding to bars, which is what I see as main unit on analogue manometer. But psi is right there too, 12,5 =~ 0.86 bar

[rayxxxxx]

@stomko11 Not in my case. {0x20,14,105,2,2,"Pressure"} shows 12.5 but Daikin display shows 2.2 bar

[stomko11]

@rayxxxxx right, I may have spoken too soon. Even if I added water to curcuit and pressure elevated to 1.4bar, the value (after calculation) is between 0,86-0,99 so it is not that. What a shame :-(

[RodEzIO]

same problem here, I am trying to read the pressure to debug an hydraulic problem but I can't get any useful value. My altherma is an EHSX08.