Electrical Troubleshooting - Graco Pro Xp 3A2494D Instructions Manual

Electrical Troubleshooting

Troubleshooting
Electrical Electrical Troubleshooting
Problem Problem Problem
Poor wrap.
ES or Hz indicator is not lit.
Operator gets mild shock.
Operator gets shock from
workpiece.
3A2494D
Cause Cause Cause
ES On/Off switch is OFF (O).
Gun air pressure too low (ES
indicator is amber).
Atomizing air pressure too high.
Incorrect distance from gun to part. Should be 8-12 in. (200-300 mm).
Poorly grounded parts.
Faulty gun resistance.
Low fluid resistivity.
Fluid leaks from the packing (2c)
and causes a short.
Faulty alternator.
ES On/Off switch is OFF (O).
No power.
Operator not grounded or is near
ungrounded object.
Gun not grounded.
Workpiece not grounded.
Troubleshooting
Solution Solution Solution
Turn ON (I).
Check air pressure to gun;
minimum 45 psi (0.32 MPa, 3.2
bar) needed at gun for full voltage.
Decrease.
Resistance must be 1 megohm or
less. Clean workpiece hangers.
See
Test Gun Resistance, page
See
Check Fluid Resistivity, page
See Packing Rod Repair, page
See Alternator Removal and
Replacement, page 44.
Turn ON (I).
Check power supply, alternator,
and alternator ribbon cable. See
Power Supply Removal and
Replacement, page 43
Alternator Removal and
Replacement, page 44.
See Grounding, page 21.
See Check Gun Electrical
Grounding, page 25, and
Test Gun Resistance, page
Resistance must be 1 megohm or
less. Clean workpiece hangers.
31.
26.
40.
and
31.
35