Graco Reactor E-XP1 Troubleshooting Manual page 12

Reactor Error Code Trouble Shooting Guide
current error, the LED on that zone's module will turn red while the error is
displayed.
2) For Hose zone, electrical short in the hose heat transformer
o Check continuity of transformer windings, and if shorted to ground.
o Perform the hose heat transformer primary and secondary check. (see hose heat
transformer not functioning section in E03)
Rev 2.6 (02/2014) Page 12