Assuming their is no Special Bylaw relating to these screen doors then if you inherited them when you bought the lot the responsibility for the doors has transferred to the EC and they are perfectly within their rights to remove and dispose of said doors.
The safest solution is to remove the door yourself and reattach when the fire doors have been replaced.
If you had installed them yourself you would remain responsible for the screens and be liable for any costs incurred by the EC for removing them to comply with the fire regs.