Graco Reactor E-XP1 Troubleshooting Manual page 35

Reactor Error Code Trouble Shooting Guide
E27: High Motor Temperature
Causes:
1) Motor temperature too high.
o Reduce fluid pressure, gun mix chamber size, or move the Reactor to a
cooler location. Allow one hour for cooling before re-setting.
2) Cooling fan is not operating properly.
3) Obstruction around the fan area that would cause lack of airflow.
4) Operating without motor/fan shroud in place.
5) Operating without the electrical cabinet front cover in place.
6) The brush wear/over-temp switch wire assembly is not plugged into J7 (E-20/E-
XP1) or J6 (E-30/E-XP2) for E-series Reactors and J9 for H-series Reactors of the
motor control board.
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.
o With the main power off, unplug the wire harness from J7 (E-20/E-XP1) or J6 (E-30/E-
XP2) for E-series Reactors and J9 for H-series Reactors on the motor control board and
install a jumper wire on pins 1 & 2. Turn the main power back on.
Rev 2.6 (02/2014)
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