If you get ERR after a couple of seconds...chances are the motor is faulty...To prove it...there is a fuse inside where the display is. You will need to strip it down to get at the fuse. If it is blown...and it probably will be......the motor will be the problem.
Replace the motor (can get from Amazon)and fuse (250ma quick blow, Soldered on )and all will be well.
fletch396
May 2017