Electrical Troubleshooting - Graco PRO Auto Xs Series Instructions-Parts List Manual

Electrical Troubleshooting

Problem
Poor wrap.
No voltage or low voltage reading on
the gun ES display module
Operator gets mild shock.
Operator gets shock from workpiece. Workpiece not grounded.
309297K
Cause
Turbine air is not turned on.
Booth exhaust velocity is too high.
Atomizing air pressure too high.
Fluid pressure too high.
Incorrect distance from gun to part.
Poorly grounded parts.
Faulty gun resistance.
Low fluid resistivity.
Fluid leaks from the packing (8d) and
causes a short.
Faulty turbine alternator.
The KV switch is stuck on low.
No power.
Damaged fiber optic cable or connec-
tion.
Turbine air is not turned on.
Poor wrap.
Operator not grounded or is near
ungrounded object.
Gun not grounded.
Troubleshooting
Solution
Turn on.
Reduce velocity to within code limits.
Decrease.
Decrease.
Should be 8-12 in. (200-300 mm).
Resistance must be 1 megohm or
less. Clean workpiece hangers.
See Test Gun Resistance on page
26.
Check fluid resistivity, page 15.
Clean the packing rod cavity.
Replace the packing rod. See page
37.
Be sure the plug is in place on the
back of the turbine alternator hous-
ing. Remove and test the turbine
alternator. See page 43.
Check the switch actuation; replace if
needed.
Replace power supply. See page 42.
Check; replace damaged parts.
Turn on.
See causes and solutions under Poor
Wrap, above.
See Grounding on page 13.
See Check Electrical Grounding on
page 14 and Test Gun Resistance
on page 26.
Resistance must be 1 megohm or
less. Clean workpiece hangers.
31