Graco Inc. 307-712 Paint Sprayer User Manual


 
15
307-712
ELECTRICAL
TROUBLESHOOTING CHART
PROBLEM CAUSE SOLUTION
*Turbine
alternator not operating.
Check air supply to turbine. Check for
dirt or moisture in turbine. See page 23.
Improper distance between gun
Adjust spraying distance to
and workpiece.
203–305 mm (8–12 in.).
Parts poorly grounded.
Clean hangers, check for proper
ground on conveyer or track.
High booth exhaust velocity
.
Reduce within code limits.
Atomizing air pressure too high.
Reduce air pressure.
Fluid pressure too high.
Reduce fluid pressure.
Fluid viscosity
.
Check supplier for proper fluid for
electrostatic spray
.
Fluid resistivity too low
.
Check fluid resistivity with paint
meter and probe.
Faulty gun resistance.
Check gun resistance. See page 16.
Faulty resistor stud resistance.
Check resistor stud resistance.
See page 17.
Faulty power supply resistance.
Check power supply resistance.
See page16.
Faulty electrode.
Replace electrode. See page 18.
*Faulty turbine alternator
.
Be sure plug is in place on back of
turbine alternator housing.Remove and
test turbine alternator
. See page 23.
Poor wrap–around.
Operator gets mild
shock.
Operator not properly grounded or is in
Be sure floor is properly grounded.
contact with ungrounded object.
W
ear 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.
Gun not properly grounded.
See
Check the Electrical Grounding
,
page 8. Be sure Graco
electrically con-
ductive air supply hose is being used
and is properly grounded.
Operator gets mild
shock when touching
work piece.
W
ork piece not properly
Clean work piece hangers. Check for
grounded.
proper ground on conveyor or track.
*ES indicator light not on when gun is triggered.