Electrical Troubleshooting - Graco 244592 Instructions-Parts List Manual

Troubleshooting

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.
34
Cause
Turbine air is not turned on.
Booth exhaust velocity is too high.
Atomization 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.
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
29.
Check fluid resistivity, page 17.
Clean the packing rod cavity.
Replace the packing rod. See page
41.
Be sure the plug is in place on the
back of the turbine alternator hous-
ing. Remove and test the turbine
alternator. See page 47.
Check the switch actuation; replace if
needed.
Replace power supply. See page 46.
Check; replace damaged parts.
Turn on.
See causes and solutions under Poor
Wrap, above.
See Grounding on page 15.
See Check Electrical Grounding on
page 16 and Test Gun Resistance
on page 29.
Resistance must be 1 megohm or
less. Clean workpiece hangers.
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