Troubleshooting
313289W 27
Display not lit on system with wall
power supply. No green light present
on back of display module (204).
No electric power. Disconnect “off” or
breaker “open.”
Reset main disconnect and breaker.
No green lights present on display,
FCM, or USB module.
Check for 24 Vdc on J1, pins 2 and 3, of power
supply. See Detailed Electrical Schematic,
XM Sprayer with Wall Power (page 1), starting
on page 51. If there is not 24 Vdc, replace with
15V747.
No display power through CAN cable
(266). Green light in present on FCM
(218), but is not present on USB
module (219).
Check CAN cable. Replace if necessary. See
Wall Power Supply Assembly, page 85.
Green light is present on USB module
(219).
Check CAN cable (274). Replace if necessary.
See Wall Power Supply Assembly, page 85.
Display not lit on system with wall
power supply. Green light is present
on back of display module (204).
Display module failed. Replace display module. See User
Interface/Control Box, page 30.
Pumps do not run when Run Mode is
selected and the blue LED is
illuminated.
Air pressure to pumps too low. Increase pressure to 50 psi (0.35 MPa, 3.5 bar)
or greater.
Air pilot lines are obstructed. Check pilot lines for kinks or pinches.
Solenoid valve stuck. Actuate solenoid manually, if it does not
operate, replace solenoid. Page 30.
Air pilot valve(s) to motor stuck. Replace valve(s). Page 40.
Metering valve(s) not opening. Service or replace valve(s). Page 40.
Air motor stalled. See air motor manual.
Pump Test completes without error,
but A or B component has more than
750cc of fluid in beaker.
Incorrect pumps were selected in
System Setup screens.
See Appendix A, in your XM sprayer operation
manual.
Air is trapped in fluid due to excessive
agitation, circulation, and heat. Fluid is
measured by volume when it is
compressed under pressure.
Repeat Pump Test with fresh fluid.
If the specific gravity of each fluid is known,
check samples by weight (750cc x specific
gravity equals weight in grams).
If weight is correct, extra volume in beaker is air.
Batch Test completes without error,
but A or B component has more fluid
in beaker than displayed on screen.
See causes for previous pump test
problem.
See solutions for previous pump test problem.
Sprayer does not start when start
button is pressed.
Faulty start switch or wire harness. Check start switch and wiring harness
continuity; switch is normally open circuit.
See Detailed Electrical Schematic, XM
Sprayer with Wall Power (page 1), starting on
page 51.
Faulty stop switch or wiring harness. Check stop switch and wiring harness
continuity; stop switch is normally closed circuit.
See Detailed Electrical Schematic, XM
Sprayer with Wall Power (page 1), starting on
page 51.
Fluid valves leaking. Loose or worn packings. Tighten packing nut. If leak continues, replace
packings.
Problem Cause Solution
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