Cooling mode, but

[Post and beam]

I hope the picture shows the artefact of interest. There is a very small orange bit on the top of the cooling values for each hour. I wonder what this represents, does anyone know?

[JohnMo]

Give us a clue, what are we looking at is this heat pump energy consumption?

 

Red could indicate heating and blue cooling. Did you have DHW heating selected in the red zones?

[Post and beam]

Apologies i thought this would be more familiar. Vaillant app, cooling has been on for about 4 days, no heating of course. There is a small orange section on top of each hour division, not very clear on this image. Orange represents heating normally. 

I cannot understand why there would be any heating recorded.

The RED columns are the DHW. They are not of interest here.

[JohnMo]

Is the heat pump running for long periods or is it cycling. If you get a short running cycle it may detect it as heating instead of cooling.

 

But think from looking elsewhere, orange is the colour for heating, red DHW and blue cooling. So it's detected something as heating.

[Post and beam]

No this installation does not short cycle. 2 or 3 cycles per day typically.

The colours are as you say and as i described. The curiousity is why it appears to have a small amount of heating recorded on most of the hour divisions when it is in purely cooling mode.

[Ed_]

Is it always the same height?

Could be a drawing error in the app, where even 0 shows up?

[Dillsue]

Does the HP always start up in heating mode before it switches to cooling so at the start of every cycle they'll be a short period of heating.....circulating pump running to establish flow is always done in heating mode??

[Bramco]

1 hour ago, Ed_ said:

Is it always the same height?

Could be a drawing error in the app, where even 0 shows up?

More than likely sloppy app design/programming.

 

Hmmm I need a column where I can put the values for heating and cooling. I'll put cooling in blue at the bottom and heating at the top in orange.  Now simply drop in the values...

 

Net effect the interface code which is no doubt a package will display the elements in the stack, even if one is zero.  Probably never tested in earnest and even if it was, it probably wasn't seen as something that a user might question.

 

One test would be to hover over the sections in the column to see if the orange one displays zero? That's assuming they implemented that.

 

The Octopus app is similar, in it's display of cheap rate and normal rate usage for an hour.  There's always a normal rate block even though you haven't used anything.

 

[Post and beam]

The picture has not displayed as clearly as i recorded it but close examination shows that some of the hour columns do not have any orange topping to them.

19 minutes ago, Dillsue said:

Does the HP always start up in heating mode before it switches to cooling so at the start of every cycle they'll be a short period of heating

Due to the very low number of cycles per day i dont think this is a factor.

Its not a problem as the house is nice & cool but it is curious which is why i asked here if anyone had any insight.

[JohnMo]

25 minutes ago, Dillsue said:

Does the HP always start up in heating mode before it switches to cooling

They don't do that. In cooling mode the 4 way valve starts in cooling mode. Otherwise it would end up chasing it's tail. 

 

But in periods between cycles (circulation pump on) it may see this as heating or cooling dependent on what temperature is see on the flow or return. But as Vaillant is a default heating ASHP with an additional widget to get cooling, it may just count everything that is not active cooling as heating anyway. It's energy used one way or another so would be included in the CoP (EER) calculation if your doing that.