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Electrical Troubleshooting
22 312900G
Electrical Troubleshooting
NOTE: Check all possible remedies in the Troubleshoot-
ing Chart before disassembling the gun.
* ES indicator light is off when the gun is triggered.
Electric Shock Hazard
Installing and servicing this equipment requires
access to parts which may cause an electric shock or
other serious injury if the work is not performed prop-
erly. Do not install or repair this equipment unless you
are trained and qualified.
Problem Cause Solution
Poor wrap. ES ON/OFF valve OFF (0).* Turn ON (I).
(In general, a Pro Xs Waterborne gun
will have less wrap than a Pro Xs
solventborne gun.)
Gun air pressure too low. Check air pressure to gun; minimum
40 psi (0.28 MPa, 2.8 bar) needed at
gun for full voltage.
Atomizing air pressure too high. Decrease.
Fluid pressure too high. Decrease.
Incorrect distance from gun to part. Should be 8-12 in. (200-300 mm).
Poorly grounded parts. Resistance must be 1 megohm or
less. Clean workpiece hangers.
Faulty gun resistance. See Test Total Gun Resistance on
page 23.
Faulty turbine alternator. Be sure the plug is in place on the
back of the power supply housing.
Remove and test the turbine alterna-
tor. See page 33.
The KV HI-LO lever is on LO. Check the lever actuation; replace if
needed.
ES indicator or voltage/current dis-
play is not lit.
ES ON/OFF valve OFF (0).* Turn ON (I).
No power. Replace power supply. See page 32.
Voltage/current display stays red
(smart guns only).
Gun too close to part. Should be 8-12 in. (200-300 mm).
Dirty gun. Clean. See Maintenance on page
20.
Operator gets mild shock. Operator not grounded or is near
ungrounded object.
See Grounding on page 14.
Gun not grounded. See Check Electrical Grounding on
page 15 and Test Total Gun Resis-
tance on page 23.
Operator gets shock from workpiece. Workpiece not grounded. Resistance must be 1 megohm or
less. Clean workpiece hangers.