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307-638 15
ELECTRICAL
TROUBLESHOOTING CHART
PROBLEM CAUSE SOLUTION
*ES
ON–OFF lever in OFF position.
T
urn lever to ON.
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.
*T
urbine alternator not operating
Check if ES ON–OFF lever is ON.
(no audible whine).
Check air supply to gun. Check for
dirt or moisture in turbine. See
page 23.
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 needle electrode assembly
.
Replace needle electrode assembly
.
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
Be sure floor is properly grounded.
or is in contact with ungrounded
W
ear shoes with conductive soles
object.
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.
Gun not properly grounded. See
Check the Electrical Grounding
,
page 8. Be sure Graco air supply hose
is being used and is properly grounded.
Operator
gets mild
shock when touching
work piece.
Work
piece not properly
Clean work piece hangers. Check
grounded.
for proper ground on conveyor or
track.
*ES
indicator light not on when gun is triggered.