Hi, I'm reaching out for a bit of advice as I've no previous maintenance, service or contact details for my boiler system in the flat I own. From what I can determine I have a Electric Flow boiler system connected (somehow) to a Unvented Water Heater solution, complete with underfoor heating to each room in the flat. The boiler is a Amptec C900 unit, which after returning power to it (by flicking the switch in the fusebox) starts up, shows a green light for 'supply' but then after a short amount of time starts flashing red in the alarm section. I've managed to find an online manual http://www.