You can see from picture 1 that the ASHP kicked in at 17:30 ( 16:00- 1900 is 35p / kWh and I really don’t want to consume electricity at this rate) pic 2 you can see that the unit on the right is whirring away. (Unit on the left is not running).

luckily it was sunny today so I have only used some of the battery rather than than import from the grid  - but I still need to know why it is running? I don’t think it was a defrost cycle. It’s 5 degrees outside - but it wasn’t doing much from about 16:00 - so I can’t imagine that it needed to defrost? 

thanks again.

You said you have checked zone 2 was this a typo as it’s zone 1 you need to check.

if the fan is running turn off the main controller by holding down the power button and go and check the fan again.

Has it stopped?  Can you check that the power draw for the house is now back to normal.

I would some basic checks to prove it’s the heat pump running.  

i would also find the switch for the immersion and turn it off and check power draw again .

sorry but I am really confused. I seem to be spending money on nothing!

You have the clock symbol by the tap so that shows its using the schedule, it also has the square by it that shows its inactive which at 17.50 is correct per your schedule.

If the purple section in the solar chart is showing house usage of around 3-4kW between 5-6pm thats not due to the heat pump heating the hot water.

Under the tap symbol you have the house heating symbol, your system is set up for 2 zones.  Its displaying that zone 2 is paused but that doesn't mean that zone 1 wasn't running, if you flick it to zone 1 by pressing the button underneath the z1/z2 then it will change to display zone 1, if you have a play symbol then the heat pump is heating zone 1.

The other thing that is could be is that the immersion assuming you have one is heating the hot water is that something you can check? 

it looks like schedule1 is set Jan to Dec and schedule 2 is inactive - but both schedules are set per image 3.

image 1 shows current state - water at 35degrees I think. Nothing calling for heat. So why is the system pumping? Image 4 (now 18:00 and Elex is 35p per kWh plus vat)? 

I’d appreciate any help but short of putting a timeswitch on the whole system I seem powerless to stop it needlessly operating?

The heating and hot water should display the timer symbol next to them if they set to use the schedule.  

so the question remains - why are the units cycling when neither heat, nor hot water are being called?