E21: No Component A Transducer; E22: No Component B Transducer; E23: High Fluid Pressure; E24: Pressure Imbalance - Graco Reactor E-20 Series Manual

E21: No component A
transducer
1. Check transducer A connection at J3 on motor con-
trol board, page 37, and clean contacts.
2. Reverse A and B transducer connections. If error
moves to transducer B (E22), replace transducer A,
page 39. If error does not move, replace motor con-
trol board, page 37.
E22: No component B
transducer
1. Check transducer B connection at J8 on motor con-
trol board, page 38, and clean contacts.
2. Reverse A and B transducer connections. If error
moves to transducer A (E21), replace transducer B,
page 39. If error does not move, replace motor con-
trol board, page 37.

E23: High fluid pressure

1. Relieve pressure. Verify low pressure with analog
gauges. Turn main power OFF
. If error persists, do checks below.
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 37.
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 39) and replace with
"test" transducer.
312066ZAD
b. Turn on the Reactor master power.
•
•
4. If the error persists and no root cause is found
through the above testing, replace the motor control
board, page 37.

E24: Pressure Imbalance

If the pressure difference between components A
and B exceeds 500 psi (3.5 MPa, 35 bar), an E24
will occur. This default value is adjustable; see the
operation manual.
E24 can be an alarm or a warning, as desired. Set
DIP switch on motor control board ON for alarm,
OFF for warning. See page 37.
Fast E24 Errors
then ON
Fast E24 errors occur:
• within 10 seconds of turning the pumps on, or
• as soon as you trigger the gun.
Causes of Fast E24 Errors
• one side of the gun is plugged.
• a pressure transducer has failed.
• damaged pump seals or check valve.
• no feed pressure or empty material drum
• plugged heater.
• plugged hose.
• plugged manifold.
• one PRESSURE RELIEF/SPRAY valve is leaking or
is set to PRESSURE RELIEF/CIRCULATION
Motor Control Diagnostic Codes
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.
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