What is this BCA control panel icon?

[mickle026]

Does anyone know what this icon next to the mains icon means?
The one that's either s/4 or 5/4 in a box.
It's not in the manual and i am a bit perplexed why it's there.

Wondering if it's anything to do with the whale blown air system that keeps locking out or if it's something else.

Thanks

 

[Just smiffy]

Could be an S4 fault code on your whale heating….

 

[rb62]

Here's the manual

https://bcagroup.co.uk/wp-content/uploads/2022/09/Seattle-Manual.pdf

 

[mickle026]

Thank you both, that's the right diagnosis, same symbol as the manual on the link. Thanks for that link, very helpful.
It goes with the lockout message that says air pressure fault , just never seen that symbol before with the error. The heater has been faulty since we bought the van. Done the resets (control panel and red button on the whale device) and removing the voltage from it, no difference. Sometimes it'll work and more than work it won't.
I think it may need servicing because the vents are not obstructed at all and it faults on gas and electric at any heat level, but is ok on just the fan so I think there may be a circuit fault, maybe a sensor.
We have no such issues with the water heater, that works fine.