E27 : High Motor Voltage

To avoid serious injury follow all warnings and instructions in the manual. Wear appropriate personal protective equipment.

Motor temperature too high

Reduce fluid pressure, gun mix chamber size, or move the Reactor to a cooler location. Allow one hour for cooling before re-setting

Cooling fan is not operating properly

Obstruction around the fan area that would cause lack of airflow.
Operating without motor/fan shroud in place
Operating without the electrical cabinet front cover in place
The brush wear/over-temp switch wire assembly is not plugged into J7 (E-20/E-XP1) or J6 (E-30/E-XP2)

If everything appears to be fine and the motor really isn’t overheated then see if the problem is with the motor/motor wire assembly, or if the problem is in the motor control board itself.

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.