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Troubleshooting
3A1696C 19
Troubleshooting
Before you proceed with Troubleshooting, perform Pressure Relief Procedure, page 7.
Check everything in the troubleshooting tables before you disassemble any equipment.
Paint Guns and Bead Guns
PROBLEM CAUSE SOLUTION
Paint guns not spraying Clogged tips Clean tips
Fuse (20A) is blown Check 20A fuse between engine and solenoid
air valve connector.
Gun arm safety switch Check to make sure connectors on gun arm
safety switch are properly attached. When
gun arm is in down position, measure 12V
across the switch terminals to ensure it is
working properly. Replace switch if neces-
sary.
Air compressor and unloader valve 1. Turn toggle switch at top of unloader (148)
to horizontal. NOTE: Unloader bypasses
air when system pressure reaches
approximately 115-120 psi (8 bar).
2. Turn off bead tank air valve (184) to iso-
late system.
3. If no leaks, check paint gun actuation air
lines.
Paint gun actuation airline 1. Remove actuation air lines from paint gun.
2. Trigger skipline controller.
3. If air flows from airline, repair paint gun
(manual 308613). If air does not flow,
check solenoid valves.
Solenoid valves 1. Go to diagnostic screen and check to see
if all solenoids are being recognized by
RoadPak Skipline Controller (manual
3A1215).
2. Remove solenoid valve cover (519).
3. Check for broken wiring or a damaged
plug (see Wiring Diagram, page 25).
4. Check for 12V DC between red wire and
ground.
Programmable Skipline Controller 1. Go to diagnostic screen and make sure all
switches are properly working (manual
3A1215).
2. Inspect wiring and plugs for damage.
3. Replace any damaged wiring or plugs
(manual 3A1301).