Graco 313289s important safety instructions See Appendix a in manual

		Troubleshooting
Problem	Cause	Solution
Pumps do not run when Run Mode is	Air pressure to pumps too low	Increase pressure to 50 psi (0.35 MPa,
selected and the blue LED is illuminated.		3.5 bar) or greater.
	Air pilot lines are obstructed	Check pilot lines for kinks or pinches.
	Solenoid valve stuck.	Actuate solenoid manually, if it does not
		operate, replace solenoid. Page 32.
	Air pilot valve(s) to motor stuck.	Replace valve(s). Page 42.
	Metering valve(s) not opening.	Service or replace valve(s). Page 42.
	Air motor stalled.	See manual 311238.
Pump Test completes without error, but A	Incorrect pumps were selected in System	See Appendix A in manual 312359.
or B component has more than 750cc of	Setup screens.
fluid in beaker.
	Air is trapped in fluid due to excessive	Repeat Pump Test with fresh fluid.
	agitation, circulation, and heat. Fluid is
		If the specific gravity of each fluid is
	measured by volume when it is com-
		known, check samples by weight (750cc
	pressed under pressure.
		x specific gravity equals weight in grams).
		If weight is correct, extra volume in bea-
		ker is air.
Batch Test completes without error, but A	See causes for previous pump test prob-	See solutions for previous pump test
or B component has more fluid in beaker	lem.	problem.
than displayed on screen.
Sprayer does not start when start button	Faulty start switch or wire harness.	Check start switch and wiring harness
is pressed.		continuity; switch is normally open circuit.
		See Electrical Schematics, starting on
		page 47.
	Faulty stop switch or wiring harness.	Check stop switch and wiring harness
		continuity; stop switch is normally closed
		circuit. See Electrical Schematics, start-
		ing on page 47.
Fluid valves leaking.	Loose or worn packings.	Tighten packing nut. If leak continues,
		replace packings.
Paint does not cure consistently.	Ratio not set correctly.	Check that correct ratio is set and set by
		volume. See manual 312359.
	Material not mixing correctly.	Test pump. Make sure mixer is clean;
		flush as needed. See manual 312359.
		Position mixer after integrator hose.
	Material not properly conditioned before it	Mix material thoroughly.
	was added to sprayer.
	Not using enough integration hose.	Add more integration hose.
		Select “fast dosing” in setup.
Poor spray pattern.	Fluid pressure too low.	Increase pump pressure.
Also, see “System runs erratically” below.
	Fluid temperature too low.	Increase fluid temperature.
	Spray tip dirty or worn.	Relieve pressure. Clean or replace tip.
		Follow gun manual instructions.
	Fluid A or B filters plugged.	Clean filters. See pump manual.
	Mixer or hoses partially plugged or too	Inspect parts for cured material. Clean or
	restrictive.	replace, or use larger hoses and mixer.

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