Graco Inc 235-894, 4600SC Electrical Troubleshooting Chart, See Check the Electrical Grounding

ELECTRICAL TROUBLESHOOTING CHART

PROBLEM	CAUSE	SOLUTION
Poor wrap-around	Improper distance between gun	Adjust spraying distance to
	and workpiece	8 to 12 inches (203 to 305 mm).
	Parts poorly grounded	Clean hangers, check for proper
		ground on conveyer or track.
	High booth exhaust velocity	Reduce exhaust velocity within
		code limits.
	Atomizing air pressure too high	Reduce atomizing air pressure.
	Fluid pressure too high	Reduce fluid pressure.
	Improper fluid viscosity	Check supplier for proper fluid for
		electrostatic spray.
	Fluid resistivity too low	Check fluid resistivity with paint
		meter and probe.
	No or low voltage output	Check possible causes listed below.
	Turbine alternator not operating	Check air supply to gun.
	Faulty gun resistance	Check gun resistance. See page 16.
	Fluid leaks from fluid rod packing	Clean fluid rod cavity, replace packing.
	and causes short	See page 23.
	Faulty turbine alternator	Be sure plug is in place on back of
		turbine alternator housing. Remove
		and test turbine alternator. See page 25.
	KV HI-LO switch stuck on low	Check switch actuation; replace if
		needed.
Operator gets shock	Operator not properly grounded	Be sure floor is properly grounded.
	or is near an ungrounded object	Wear shoes with conductive soles
		or wear personal grounding straps.
		Be sure operator is not in contact
		with or carrying any metallic items
		which could build up electrical charge.
	Gun not properly grounded	See Check the Electrical Grounding.
Operator gets shock	Workpiece not properly	Clean workpiece hangers. Check for
when touching workpiece	grounded	proper ground on conveyor or track.
No or low voltage output	Damaged fiber optic cable or	Check cables and connections.
reading on gun display	connection	Replace if damaged.
module		See other causes under Problem –
		“Poor wrap-around”, above.

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