HP GRACO OR PRO TI1681A - Manual (Page 40)

Troubleshooting
40 309293J
* ES indicator light is off when the gun is triggered.
Problem Cause Solution
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 47.
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 Operation on page 19.
Dirty gun. Clean. See page 27.
Operator gets mild shock. Operator not grounded or is near
ungrounded object. See Grounding on page 17.
Gun not grounded. See Check Electrical Grounding on
page 18 and Test Gun Resistance
on page 30.
Operator gets shock from workpiece. Workpiece not grounded. Resistance must be 1 megohm or
less. Clean workpiece hangers.