Electrical Troubleshooting - Graco 222625 Instructions-Parts List Manual

Electrical Troubleshooting

Problem
Poor wrap-around
Operator gets a mild shock
Operator gets a shock when
touching the workpiece
* ES indicator light is not on when the gun is triggered.
20 308018
Troubleshooting
Cause
The ES ON-OFF lever is in the OFF (O)
position.*
The distance between the gun and work-
piece is incorrect.
The parts are poorly grounded.
The booth exhaust velocity is too high.
The atomizing air pressure is too high.
The fluid pressure is too high.
The fluid viscosity is not right for electros-
tatic spray.
The fluid resistivity is too low.
The turbine alternator is not operating.*
The gun resistance is faulty.
Fluid leaks from the needle packing and
causes a short.
The turbine alternator is faulty.
The operator is not properly grounded or
is near an ungrounded object.
The gun is not properly grounded.
The workpiece is not properly grounded.
Solution
Turn the lever to ON (1).
Adjust the spraying distance to 8 to 12 inches
(203 to 305 mm)
Clean the workpiece hangers. Check for
proper grounding on the conveyer or track.
Reduce exhaust velocity within code limits.
Reduce the atomizing air pressure.
Reduce the fluid pressure.
Check with the supplier for proper fluid viscos-
ity for electrostatic spray.
Check the fluid resistivity with a paint meter
and probe.
Check if the ES ON-OFF lever is ON (1).
Check the air supply to the gun. Check for dirt
or moisture in the turbine. See page 30.
Check the gun resistance. See page 21.
Clean the needle cavity. Replace the fluid
needle. See page 28.
Be sure the plug is in place on the back of the
turbine alternator housing. Remove and test
the turbine alternator. See page 30.
Be sure the floor and the operator are properly
grounded. See Ground the System, page 10.
See Check the Electrical Grounding,
page 11.
Clean workpiece hangers. Check for proper
grounding on the conveyor or track.