Alarm Codes And Troubleshooting - Graco XM Series Operation Manual

Alarms

Alarm Codes and Troubleshooting

NOTE: See XM Plural-Component Sprayers Repair-Parts manuals for non-alarm based troubleshooting.
Alarm
Code Alarm Problem
R4B Ratio High B (Overdose B),
system delivering too much B
component.
R1B Ratio Low B (under dose B);
system delivering not enough
B component.
REC System detected five R4B
(ratio high B) or five R1B
(ratio low B) alarms within five
minutes. Sprayer shuts down
for five minutes to resolve
problem.
FHA System detects pump move-
FHB ment (fluid flow) when there
should not be.
52
When Active
General Performance Alarms
Spray B Dosing valve not closing.
No B restriction at mix manifold. Increase B Restriction by turn-
Pump filter plugged on A side.
Inlet air dropping below 80 psi
(0.55 MPa, 5.5 bar) while spray-
ing. B dosing valve not closing
correctly.
Solenoid air regulator set below
80 psi (0.55 MPa, 5.5 bar)
Spray B dosing valve will not open.
B mix manifold valve closed.
Pump filter plugged on B side.
Spray See R4B or R1B alarm causes. See R4B or R1B alarm solu-
Spray Recirculation valve or dosing
valve open or leaking for more
than five seconds.
Cause
Perform Pump Test to test for
leakage. See Pump and Meter-
ing Test, page 40.
Loosen valve packing nut. See
manual 313289.
Check air signal at valve top
Repair valve or air solenoid.
See manual 313289.
ing B restrictor stem clockwise.
See Adjust B Machine Outlet
Restriction, page 33.
Clean filter. See manual
311762.
Use alternate 30 mesh screen.
See manual 311762 for part
number.
Check air filters. See manual
313289.
Use larger air hose.
Use larger compressor.
Use smaller gun tips or less
guns to reduce flow rate.
Adjust air regulator.
Check for air signal to valve.
Open green mix manifold valve.
Use alternate 30 mesh screen.
See manual 311762 for part
number.
Clean B pump outlet filter. See
manual 311762.
tions. Flush mixed material if
necessary, and purge off-ratio
mixed material in hose.
Close or repair recirculation
valve, and run Pump Test. See
Pump and Metering Test,
page 40. See manual 313289 if
needed.
Solution
312359J