Electrical Troubleshooting Chart - Graco PRO AA4000 Instructions Manual

ELECTRICAL TROUBLESHOOTING CHART

PROBLEM
Poor wrap–around.
Operator gets mild
shock.
Operator gets mild
shock when touching
work piece.
*ES indicator light not on when gun is triggered.
CAUSE
*ES ON–OFF lever in OFF position.
*Turbine alternator not operating
Improper distance between gun
and work piece.
Parts poorly grounded.
High booth exhaust velocity.
Atomizing air pressure too high.
*Fluid resistivity too low.
*Faulty gun resistance.
*Faulty resistor stud resistance.
*Faulty power supply resistance.
*Damaged electrode wire.
*Faulty turbine alternator.
Operator not properly grounded
or is in contact with ungrounded
object.
Gun not properly grounded.
Work piece not properly
grounded.
SOLUTION
Turn lever to ON.
Check if ES ON–OFF lever is ON.
Check air supply to gun. Check for
dirt or moisture in turbine. See
page 23.
Adjust spraying distance to
203–305 mm (8–12 in.).
Clean hangers, check for proper
ground on conveyer or track.
Reduce within code limits.
Reduce air pressure.
Check fluid resistivity with paint
meter and probe.
Check gun resistance. See page 14.
Check resistor stud resistance.
See page 15.
Check power supply resistance.
See page14.
Replace electrode wire.
See page 16.
Be sure plug is in place on back of
turbine alternator housing.Remove
and test turbine alternator. See
page 20.
Be sure floor is properly grounded.
Wear shoes with conductive soles
or wear personal grounding straps.
Be sure operator is not in contact
with or carrying any metallic items
which could build up electrical
charge. If worn, a glove must be
conductive or modified as shown
on page 8.
See Check the Electrical Grounding,
page 7. Be sure Graco air supply hose
is being used and is properly grounded.
Clean work piece hangers. Check
for proper ground on conveyor or
track.