Thanks for the prompt reply Damian,I realise now I should have explained that no amount of insertion combinations will allow the arrows to line up correctly,maybe it's just a case of whomever carried out the initial installation stuck the arrows on back to front ,so it only lines up black to red .Is there any way to determine the correct placement of the cell if the arrows are wrong?Sorry for rambling
I followed this great guide on a vent axia unit installed in a council property,the arrows however did not correspond I.e black to black red to red before I extracted the cell.Has it been incorrectly installed all this time(10 years)?Which way around do I insert it now?
