Graco 313289s important safety instructions Tor Power Supply Control Compo

Troubleshooting

Problem	Cause	Solution
System runs erratically.	Air filter(s) clogged. Replace elements.	Clean. Replace element(s). See page 31.
	Air supply hoses undersized.	Replace hoses with appropriate size.
	Air compressor undersized.	Use larger air compressor.
	Air supply pressure tank undersized.	Use larger pressure tank.
	Inlet air pressure gauge drops below 50	See solutions above for system runs
	psi (0.35 MPa, 3.5 bar) while spraying.	erratically problem.
	A and/or B air motor has ice.	Open air motor de-ice bleed air control.
		Allow ice to melt. Dry the compressed air.
		Heat the compressed air. Use a smaller
		tip and lower flow rate.
	Pump is binding.	Repair lower. See Remove Displace-
		ment Pump, page 44.
Air supply relief valve opens.	Air regulator set too high.	Lower setting.
Turbine alternator makes high-pitched	Turbine bearings worn. (Setting turbine	Replace turbine cartridge. See Alterna-
whining noise, or quits.	air regulator too high, wears bearings.)	tor Power Supply Control Compo-
		nents, page 38.
Display module cycles on and off.	Turbine is not supplying enough power to	Increase turbine regulator setting to
	board.	18 +/- 1 psi (12.6 +/- 10 kPa, 1.26 +/- 0.07
		bar). Check voltages on information
		screen. 10-14 Vdc when spraying.
		Check turbine and electrical control
		exhaust air for restrictions.
		Replace turbine cartridge. See Alterna-
		tor Power Supply Control Compo-
		nents, page 38.
Flow rate too low.	Air supply hose is too small or too long.	Use 3/4 in. (minimum) ID hose. See
		Technical Data, page 85.
	Inadequate air supply.	Use larger CFM compressor.
	Air pressure to pumps too low.	Increase pressure.
	Fluid A or B filters plugged.	Clean filters. See pump manual.
	Spray tip too small.	Relieve pressure. Install larger tip. Follow
		gun manual instructions.
	Mixer or hoses partially plugged or too	Inspect parts for cured material. Clean or
	restrictive.	replace, or use larger hoses and mixer.
Receive ratio alarm after starting in spray	A and B hoses do not fill to correct pres-	While in circulation mode, close circula-
mode while using remote mix manifold.	sure ratio simultaneously. Therefore,	tion valves and increase pressure in
	spray time increases in order to balance	hoses until correct spray pressure is
	pressure. Ratio screen bar graph stays to	achieved.
	one side until pressure balances.
		Select correct hose size to balance your
		volume ratio. See manual 312749.
Receive ratio alarm while using remote	A and B hoses do not fill to correct pres-	While in circulation mode, close circula-
mix manifold after a significant change in	sure ratio simultaneously. Therefore,	tion valves and increase pressure in
pressure.	spray time increases in order to balance	hoses until correct spray pressure is
	pressure. Ratio screen bar graph stays to	achieved.
	one side until pressure balances.
		Select correct hose size to balance your
		volume ratio. See manual 312749.
		Change pressure slowly while spraying.
Erratic pressure at spray gun when using	Feed pressure is too high. Feed pressure	Use lowest feed pressure needed to
feed pumps.	at metering pump is too high on up	maintain feed.
	stroke. Doubles the feed pressure to out-
	let pressure on up stroke only.

22 313289S