- With the main power off, unplug the wire harness from J7 (E-20/E-XP1) or J6 (E-30/E-XP2) on the motor control board and install a jumper wire on pins 1 & 2. Turn the main power back on.
The E27 error should be gone.
- If the E27 error is gone and the motor is truly not overheated then the problem is likely in the motor/motor wire harness assembly. You can verify this by measuring the resistance between the 2 yellow wires that go to pins 1 & 2 of the motor o/t connector. If it is an open connection, the thermal overload switch is open or there is a broken wire inside the motor or in the motor harness.
- If the E27 error code is still there, then double check to see if pins 1 & 2 are jumpered properly. If they were jumpered properly then it would likely be a problem within the motor control board.