Graco 3A2495C Test Gun Resistance, Check Fluid Resistivity, See Alternator Removal, Replacement

		Troubleshooting
Electrical Troubleshooting
Problem	Cause	Solution
Poor wrap.	ES On/Off switch is OFF (O).	Turn ON (I).
	Gun air pressure too low (ES	Check air pressure to gun;
	indicator is amber).	minimum 45 psi (0.32 MPa, 3.2
		bar) needed at gun for full voltage.
	Atomizing air pressure too high.	Decrease.
	Fluid pressure too high.	Decrease, 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, page 32.
	Low fluid resistivity.	See
		Check Fluid Resistivity, page 26.
	Fluid leaks from the fluid needle	See Fluid Needle Replacement,
	packings and causes a short.	page 44.
	Faulty alternator.	See Alternator Removal and
		Replacement, page 46.
ES or Hz indicator is not lit.	ES On/Off switch is OFF (O).	Turn ON (I).
	No power.	Check power supply, alternator,
		and alternator ribbon cable. See
		Power Supply Removal and
		Replacement, page 45 and
		Alternator Removal and
		Replacement, page 46.
Operator gets mild shock.	Operator not grounded or is near	See Grounding, page 21.
	ungrounded object.
	Gun not grounded.	See Check Gun Electrical
		Grounding, page 25, and
		Test Gun Resistance, page 32.
Operator gets shock from	Workpiece not grounded.	Resistance must be 1 megohm or
workpiece.		less. Clean workpiece hangers.

3A2495C 37