BUG ?: Exhaust Supply switched

[TimoFriedri]

I think there might be some mixup with the exhaust and supply values.

1. I have checked with the official Zehnder app, used its Unbalance setting and an anemometer that the values in the Zehnder app are actually the correct ones.

2. I use pycomfoconnect indirectly in Home Assistant, but I think, the mixup happens in the pycomfoconnect library, since HA imports all the static parameters.

3. exhaust_airflow and supply_airflow values are switched in HA compared to the values in the Zehnder app!

Can anyone confirm this?

[hme0354]

i think so too

[TimoFriedri]

I think that

airflow fan duty fan speed

are mixed up. Humidity and Temperature seem fine for exhaust and supply.

[klaudiusz223]

Hi, I use my own program ComfoAirQ-Homie with OH and everything looks correct.

But i think that some const definitions could by improved. Maybe someone uses them opposite way For example these https://github.com/michaelarnauts/comfoconnect/blob/433bd3ef309c6c4f70e170eda8b3fedbae851d50/pycomfoconnect/const.py#L8-L9

could be defined similar to my definition

CMD_TEMPORARY_STOP_SUPPLY_FAN       = b'\x84\x15\x07\x01\x00\x00\x00\x00\x10\x0e\x00\x00\x01'
CMD_START_SUPPLY_FAN                = b'\x85\x15\x07\x01'


CMD_TEMPORARY_STOP_EXHAUST_FAN      = b'\x84\x15\x06\x01\x00\x00\x00\x00\x10\x0e\x00\x00\x01'
CMD_START_EXHAUST_FAN               = b'\x85\x15\x06\x01'

https://github.com/klaudiusz223/ComfoAirQ-Homie/blob/09ec1e01059361797c5f9a3d88889137d0b817a3/comfoairq_homie/comfoairq/comfoairq_const.py#L1-L5

[klaudiusz223]

One thing to check. What is the orientation of Your units? You Can check it in Zehnder app. My unit has "right" orientation. Maybe that's the problem? Maybe constants should be defined as right and left fan and depends on the orientation, fan should be assign to supply or exhaust?

[TimoFriedri]

My unit is right as shown in the Android app. And massflow/fan values are mixed up in home assistant.

Firmware is 1.7.0

On Mon, 11 Jan 2021, 13:47 klaudiusz223, [email protected] wrote:

One thing to check. What is the orientation of Your units? You Can check it in Zehnder app. My unit has "right" orientation. Maybe that's the problem? Maybe constants should be defined as right and left fan and depends on the orientation, fan should be assign to supply or exhaust?

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[michaelarnauts]

I have a left orientation, my values are correct. So some logic should be written to read the orientation and return other values based on this.

[zathras777]

Assuming that the app somehow knows the orientation and adjust it's output, guess it's there somewhere? My unit is RH and shows the same issues in HA (just raised an issue there) but looking at register 33 I get a value of 0 whereas you show 1? Can anyone else with a RH machine verify what they get?

[BrechtMo]

I noticed this yesterday as well (it's very obvious when Frost Protection is active). Today I updated my HA docker container to Home Assistant 2021.2.1 and it seems to be fixed.