Graco Inc 244581, 309293K, 244582 Electrical Troubleshooting, See Test Gun Resistance on

Troubleshooting

Electrical Troubleshooting

Problem	Cause	Solution
Voltage still present at gun after fol-	ES ON/OFF valve is not turned OFF.	Turn OFF.
lowing the Fluid Voltage Discharge
and Grounding Procedure
	Did not wait long enough for voltage	Wait longer before touching electrode
	to discharge.	with grounded rod. Check for bleed
		resistor failure.
	Air pocket in fluid line leaves fluid	Determine cause and correct. Purge
	near gun isolated.	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)	Clean the packing rod cavity.
	and causes a short.	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	Clean interior of enclosure.
	contaminants inside WB100 enclo-
	sure, causing a short circuit.

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