Graco REACTOR E-XP2 Repair Manual

Motor Control Diagnostic Codes
16 309574L
E21: No component A
transducer
1. Check transducer A connection at J3 on the motor
control board, page 35.
2. Reverse A and B transducer connections. If error
moves to transducer B (E22), replace transducer A,
page 36. If error does not move (stays the same)
replace the motor control board.
E22: No component B
transducer
E23: High pressure
1. Check the jumpers and the wiring. Check jumper on
motor control board J10 for E20 and E-XP1, or J7
for E30 and E-XP2, pins 7-10, page 34.
2. Remove, clean and re-install the pressure trans-
ducer leads
If the jumpers and the wiring are in good working condi-
tion and you still have the error, then you will need to
replace the “A” and “B” pressure transducers.
3. To determine if it’s the “A” or the “B” transducer, you
will need a known good Reactor pressure trans-
ducer to use as a “test” transducer. The test is done
without removing the existing pressure transducers
from the fluid manifold.
a. Unplug the “A” transducer from the Motor con-
trol board socket (page 36) and replace with
“test” transducer.
b. Turn on the Reactor master power.
• If the error is gone, turn off the Reactor main
power, remove test transducer, and replace “A”
transducer.
• If the error persists, unplug the “test” transducer
from the “A” socket, and reinstall the “A” pres-
sure transducer back into the “A” socket.
Repeat this test procedure on the “B” side.
4. If the error persists and no root cause is found
through the above testing, replace the motor control
board, page 34.
E24: Pressure Imbalance
Pressure Imbalance: There is a pressure difference
between the “A” and “B” fluids of more than 50% of
the set point pressure.
“Fast” E24:
• Pump zone is turned on, E24 within 5 - 10 seconds.
• E24 during trigger actuation (pressures are bal-
anced otherwise).
If gauge pressures are very close
1. Clear the error and run the unit.
2. Check plug J10 (E20/E-XP1) or J7 (E30/E-XP2) or
the jumpers 7 to 8, or 9 to 10 on the motor control
board.
3. Check pressure transducer performance:
The digital display on a Reactor always shows the
higher of the two pressures. As soon as the higher ana-
log pressure drops below the lower analog pressure the
digital display will switch to the new highest reading.
Determine which transducer is performing poorly.
1. For testing purposes only, find the dip switches
labeled SW2 on the motor control board, page 35.
Set dipswitch 3 to OFF. This will allow the Reactor to
run with a pressure imbalance alarm.
a. Check transducer B connection at J8 for E-20
and E-XP1 or J5 for E-30 and E-XP2 on the
motor control board, page 35.
b. Reverse A and B transducer connections. If
error moves to transducer A (E21), replace
transducer B, page 36. If error does not move
(stays the same) replace the motor control
board.
Relieve pressure. Verify low pressure with analog
gauges. Turn main power OFF then ON
. If error persists, do following checks.

Graco REACTOR E-XP2 Specifications

General

Brand	Graco
Model	REACTOR E-XP2
Category	Paint Sprayer
Language	English