Graco Reactor E-XP1 Troubleshooting Manual page 25

Reactor Error Code Trouble Shooting Guide
2) The Reactor motor control board is receiving a signal from the "A" or "B" pressure
transducer that is above 3000 psi for (E-20, E-30, H-25, H-40, H-50), or above 4500
psi for (E-XP1, E-XP2, H-XP2, H-XP3).
o Clean the plug and socket of transducer connection by unplugging and spraying
commercially available contact cleaner and reconnecting.
o If the wire jumper and the wiring are in good working condition and you still have
the error, then you will need to check the "A" & "B" pressure transducers. (See
transducer check procedure under E24 section.)
o To determine if it's the "A" or the "B" transducer, you may need a known good
Reactor pressure transducer 24K999 to use as a "test" transducer. The test is
going to be done without removing the existing pressure transducers from the
fluid manifold.
 Unplug the "A" transducer from the Motor control board socket J3, (E-20/E-XP1) or
J5, (E-30/E-XP2)
 Turn on the Reactor main disconnect and see if the error has went away.
 If the error goes away turn off the Reactor main power and remove & replace the "A"
pressure transducer.
 If the error didn't go away, unplug the "test" transducer from the "A" socket, and
reinstall the "A" pressure transducer back into the "A" socket, and repeat this test
procedure on the "B" side J8, (E-20/E-XP1) or J3, (E-30/E-XP2).
! If the error persists and no root cause is found through the above testing, replace the
motor control board.
3) Motor control board is shorted (E-series).
 Not in all cases will an E31 error code appear. Another symptom of a motor drive
failure is that the motor will immediately turn on when input power is applied to the
Reactor, running away with no motor control. This is due to the control being shorted
sending full vdc to the motor. If the motor runs as soon as power is applied to the
machine, replace the motor control board after verifying input voltage
Rev 2.6 (02/2014)
and plug in the "Test" pressure transducer in its place.
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