Graco 3A2098H important safety instructions Dispense Valves

Troubleshooting

Dispense Valves

Problem	Cause	Solution
Valve not opening	Air not getting to the open port	Verify air pressure to solenoid
	No “Valve On” signal from automa-	Check input from automation unit
	tion unit
Valve not shutting off	Air not getting to the close port	Verify air pressure to solenoid
	(except AutoPlus valve)
		Verify solenoid operation
		Verify air line routing and connec-
		tions
	“Valve On” signal from automation	Check input from automation unit
	unit is on
Sluggish open/close	Air pressure low	Verify air pressure is above 60 psi
		(410 kPa, 4.1 bar)
	Needle/seat worn	Rebuild valve; replace needle/seat
	Pressurized material past the valve	Reduce running pressure
	shut-off is escaping
		Reduce nozzle length
		Increase nozzle orifice size
	Faulty solenoid valve	Replace solenoid valve
	Solenoid valve muffler restricted	Clean or replace muffler
Material leaks from back of valve	Shaft seal is worn	Rebuild valve; replace seals
Air leaks from dispense valve	Loose air connections	Check air connections; tighten if
		necessary
	Worn piston o-ring	Rebuild valve; replace piston o-ring

Swirl Dispenser

Problem	Cause	Solution
Motor not running (motor fault alarm	Cable disconnected	Verify cable connections to swirl
active)		board, swirl motor cable, and swirl
		orbiter
	CAN cable was re-connected with	Cycle system power
	system power on (amber LED on
	swirl board will be on, this indicates
	circuit protection was triggered)
	Shorted motor cable (amber LED on	Replace swirl motor cable (55 ft)
	swirl board will be on, this indicates	then cycle power
	circuit protection was triggered)
	Faulty swirl orbiter	Replace swirl orbiter
Motor not running (motor fault alarm	Cable disconnected	Verify cable connections to swirl
not active)		board, swirl board power cable, and
		swirl control DGM
	No “Swirl Enable” signal from auto-	Check input from automation unit
	mation unit
	Swirl not installed	Verify that the proper swirl orbiter is
		installed in the system setup screen

64 3A2098H