I have a Flow 1 displaying “F” fault. (with flashing green light on the receiver board, v1.4.) ….. Finally I swapped the whole seat assembly for a working spare. The fault indication has cleared but the lift will not respond to the joy stick.(I swapped the remote stations as well) The receiver board, now v2.5, has two green lights, the outboard one steady and the other flashing. Has anyone access to the service manual and a clue what it is trying to tell me? The lift is in a church and has had little use, with a complete set of spares and a new one being £4k to £5k, I don’t want to give up on it!