The E5E fault code signals poor communication. It can be due to a problem, which may occur in any part of the wiring. Detecting it can be quite a challenge for a user who has no technical experience. Call a technician and have the entire wiring system checked. Also, the problem may occur due to failing main control board and speed control board. If the wiring is ok, have these units checked. Not unlikely, a whole board or part of it needs to be replaced.