Electrical Troubleshooting Chart - Graco 218-026 Instructions-Parts List 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.
Improper distance between gun
and workpiece.
Parts poorly grounded.
High booth exhaust velocity.
Atomizing air pressure too high.
Fluid pressure too high.
Fluid viscosity.
Fluid resistivity too low.
*Turbine alternator not operating
(no audible whine).
Faulty gun resistance.
Faulty resistor stud resistance.
Faulty power supply resistance.
Faulty needle electrode assembly.
*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.
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.
Reduce fluid pressure.
Check supplier for proper fluid for
electrostatic spray.
Check fluid resistivity with paint
meter and probe.
Check if ES ON–OFF lever is ON.
Check air supply to gun. Check for
dirt or moisture in turbine. See
page 23.
Check gun resistance. See page 16.
Check resistor stud resistance.
See page 17.
Check power supply resistance.
See page16.
Replace needle electrode assembly.
See page 18.
Be sure plug is in place on back of
turbine alternator housing.Remove
and test turbine alternator. See
page 23.
Be sure floor is properly grounded.
Wear shoes with conductive soles
and wear personal grounding straps.
Be sure operator is not in contact
with or carrying any metalic items
which could build up electrical
charge. If worn, a glove must be
conductive or modified as shown on
page 9.
See Check the Electrical Grounding,
page 8. 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.