Troubleshooting
32
3A5385A
Troubleshooting
Before you proceed with Troubleshooting, perform
Pres-
sure Relief Procedure
, page 8.
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 interlock switch
Check to make sure connectors on gun arm
interlock switch are properly attached. When
gun arm is in down position, measure 12V
across the switch terminals to ensure it is work-
ing properly. Replace switch if necessary.
Air compressor and unloader valve 1. Turn toggle switch at top of unloader (148)
to horizontal. NOTE: Unloader bypasses air
when system pressure reaches approxi-
mately 115-120 psi (8 bar).
2. Turn off bead tank air valve (184) to isolate
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 Road-
Pak Skipline Controller (manual 3A5387).
2. Remove solenoid valve cover (19).
3. Check for broken wiring or a damaged plug
(see
Wiring Diagram
, page 39).
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
3A5387).
2. Inspect wiring and plugs for damage.
3. Replace any damaged wiring or plugs (man-
ual 3A5387).
