F22 Dry error after power cut

[dilalio]

Apologies, hopefully I’m quoting correctly now.

It’s the larger tank which is near-empty and not filling. I haven’t tried unwrapping the smaller tank yet.

Then read my post again... Properly!
Large tank = water you wash with.
Small tank = fills CH pipework!

Like I said: stop confusing the two.
It makes this problem much harder to assist you with!

Basic fundamentals!