Heat exchanger behavior?

[jdybvik]

Hi. As the outdoor temperatur is sinking, I've been wondering about the heat exchanger behavior. In this scenario; with inlet temperatur < 5c, and extract temperature < target - 1 c - I figure the heat exchanger should be forced on permanently. However, the heat exchanger cycles on and off fairly often, leaving the temperature efficiency around 82% (and never supply temperatures above 18,2c).

What might be causing this behavior? Is it an error? AI-sensor?

[BeamCtrl]

Yes, it should be on with no interruptions at those temperatures. Have you checked the log file in RAM/err on why the cycling occurs?
//Daniel

[BeamCtrl]

seems theres a bug in the code that can cause this behaviour for non Savecair units, pushed a new commit to mitigate.28662b0

[jdybvik]

Thanks for looking in to it. Nothing out of the ordinary in err, as far as I can gather:

('127.0.0.1', 47985):9 at Tue Oct 10 15:38:05 2023
Fire start at: Tue Oct 10 15:38:05 2023
Pressure difference set to: -10% Tue Oct 10 15:38:05 2023
Changing fanspeed to:3 Tue Oct 10 15:38:06 2023
Changing fanspeed to:1 Tue Oct 10 15:48:07 2023
Pressure difference set to: 10% Tue Oct 10 15:48:09 2023
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Changing fanspeed to:3 Tue Oct 10 19:31:53 2023
Engaged Shower mode at Tue Oct 10 19:31:54 2023
Leaving Shower mode dT: 0.2990716353699412 Tue Oct 10 19:38:43 2023
Changing fanspeed to:1 Tue Oct 10 19:38:43 2023
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Changing fanspeed to:3 Wed Oct 11 05:47:08 2023
Engaged Shower mode at Wed Oct 11 05:47:09 2023
Leaving Shower mode dT: 0.3005474384087172 Wed Oct 11 05:51:01 2023
Changing fanspeed to:1 Wed Oct 11 05:51:01 2023
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
('127.0.0.1', 36919):9 at Wed Oct 11 14:57:48 2023
Fire start at: Wed Oct 11 14:57:48 2023
Pressure difference set to: -10% Wed Oct 11 14:57:48 2023
Changing fanspeed to:3 Wed Oct 11 14:57:49 2023
Changing fanspeed to:1 Wed Oct 11 15:07:50 2023
Pressure difference set to: 10% Wed Oct 11 15:07:52 2023
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.
Holdoff time in effect, will re-ping in one hour.

Have update Airiana now, but unfortunately the exchanger still seem to cycle on/off as before.

Jo

[BeamCtrl]

There is definetly an issue with the exchanger handling on non-savecair units still there, I will look into it tomorrow /Daniel 14 okt. 2023 kl. 18:49 skrev jdybvik ***@***.***>:  Thanks for looking in to it. Nothing out of the ordinary in err, as far as I can gather: ('127.0.0.1', 47985):9 at Tue Oct 10 15:38:05 2023 Fire start at: Tue Oct 10 15:38:05 2023 Pressure difference set to: -10% Tue Oct 10 15:38:05 2023 Changing fanspeed to:3 Tue Oct 10 15:38:06 2023 Changing fanspeed to:1 Tue Oct 10 15:48:07 2023 Pressure difference set to: 10% Tue Oct 10 15:48:09 2023 Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Changing fanspeed to:3 Tue Oct 10 19:31:53 2023 Engaged Shower mode at Tue Oct 10 19:31:54 2023 Leaving Shower mode dT: 0.2990716353699412 Tue Oct 10 19:38:43 2023 Changing fanspeed to:1 Tue Oct 10 19:38:43 2023 Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Changing fanspeed to:3 Wed Oct 11 05:47:08 2023 Engaged Shower mode at Wed Oct 11 05:47:09 2023 Leaving Shower mode dT: 0.3005474384087172 Wed Oct 11 05:51:01 2023 Changing fanspeed to:1 Wed Oct 11 05:51:01 2023 Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. ('127.0.0.1', 36919):9 at Wed Oct 11 14:57:48 2023 Fire start at: Wed Oct 11 14:57:48 2023 Pressure difference set to: -10% Wed Oct 11 14:57:48 2023 Changing fanspeed to:3 Wed Oct 11 14:57:49 2023 Changing fanspeed to:1 Wed Oct 11 15:07:50 2023 Pressure difference set to: 10% Wed Oct 11 15:07:52 2023 Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Holdoff time in effect, will re-ping in one hour. Have update Airiana now, but unfortunately the exchanger still seem to cycle on/off as before. Jo — Reply to this email directly, view it on GitHub<#34 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ACUJ7E4HOJWASPFZX33U5WTX7K7CBAVCNFSM6AAAAAA5YNKHPWVHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM3TEOBRGY2TA>. You are receiving this because you commented.Message ID: ***@***.***>

[BeamCtrl]

new fix is pushed along with unit testing framework for testing stuff. The unit test found a bug and its now fixed, I sure hope ;)