Graco Inc. 244582 Manual Do Utilizador

Troubleshooting

Voltage still present at gun after fol-
lowing the Fluid Voltage Discharge 
and Grounding Procedure

ES ON/OFF valve is not turned OFF. Turn OFF.

Did not wait long enough for voltage 
to discharge.

Wait longer before touching electrode 
with grounded rod. Check for bleed 
resistor failure.

Air pocket in fluid line leaves fluid 
near gun isolated.

Determine cause and correct. Purge 
air from fluid line.

Voltage isolation system failed.

Service voltage isolation system.

Grounding cylinder not operating.

Check resistance of grounding cylin-
der, page 33. Replace if needed.

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 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 Gun Resistance on page 
30.

Fluid leaks from the packing (26d) 
and causes a short.

Clean the packing rod cavity. 
Replace the packing rod. See page 
45.

Faulty turbine alternator.

Be sure the plug is in place on the 
back of the turbine alternator hous-
ing. Remove and test the turbine 
alternator. See page 48. 

The KV HI-LO lever is on LO.

Check the lever actuation; replace if 
needed.

Spilled paint, dried paint, or other 
contaminants inside WB100 enclo-
sure, causing a short circuit.

Clean interior of enclosure.