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Electrical Troubleshooting
* ES indicator light is off when the gun is triggered.
Problem Cause Solution
Poor wrap. ES ON/OFF valve OFF (0).* Turn ON (I).
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 velocity too high. Decrease fluid pressure or replace
worn tip.
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 Gun Resistance” on page
19.
Low fluid resistivity. Check fluid resistivity. See page 15.
Fluid leaks from the fluid needle (26)
packings and causes a short.
Clean the needle cavity. Replace the
fluid needle. See page 31.
Faulty turbine alternator (19). Be sure the plug is in place on the
back of the turbine alternator hous-
ing. Remove and test the turbine
alternator. See page 34.
The KV HI-LO lever is on LO. Check the lever position; replace if
needed.
ES indicator or voltage/current dis-
play is not lit.
ES ON/OFF valve OFF (0).* Turn ON (I).
No power. Repair/replace alternator turbine;
replace power supply. See page 33.
Voltage/current display stays red
(smart guns only).
Gun too close to part. Should be 8-12 in. (200-300 mm).
Check fluid resistivity. See “Check Fluid Resistivity” on
page 15.
Dirty gun. Clean. See Operation Manual.
Operator gets mild shock. Operator not grounded or is near
ungrounded object.
See “Grounding” on page 13.
Gun not grounded. See “Check Electrical Grounding” on
page 14 and “Test Gun Resistance”
on page 19.
Operator gets shock from workpiece. Workpiece not grounded. Resistance must be 1 megohm or
less. Clean workpiece hangers.