Graco 309909H important safety instructions Troubleshooting, Problem Cause Solution

Troubleshooting

Troubleshooting

WARNING

Read warnings, page 5-6.

If an alarm code displays, see page 13.

Problem	Cause	Solution
Display not lit.	Air valve not turned on.	Turn on main air valve to system.
No electric power.	Air supply pressure too low.	Increase pressure to 60 psi (0.42 MPa,
		4.2 bar) or greater.
	Air supply filters plugged.	Clean filter bowls; replace filter elements.
		Page 15.
	Turbine air regulator set too low.	Adjust to proper setting.
	Turbine alternator failure.	Repair or replace turbine. Page 19.
	Power supply not connected to main	Check power connections to main board.
	board.	See Electrical Schematic, page 22.
	Main board not connected to display	Check electrical connections between
	board.	display and main board. See Electrical
		Schematic, page 22, and 248349 Main
		Control Board Schematic, page 23.
	Display board failure.	Replace display board. Page 18.
	Power not connected to unit (non-IS units	Ensure that power cord is plugged in.
	only).	Check that cord is connected properly;
		see ProMix Easy Operation manual.
Pumps do not run.	Air pressure to pumps too low.	Increase pressure to 50 psi (0.35 MPa,
		3.5 bar).
	Solenoid valve stuck.	Actuate solenoid manually, if it does not
		operate, replace solenoid. Page 20.
	Dispense valve(s) not opening.	Service or replace valve(s). See 310655.
Pump test volume is not correct.	Air pressure to pumps too low	Increase pressure to 50 psi (0.35 MPa,
		3.5 bar).
	Sensors not functioning properly.	Check position of sensors. See ProMix
		Easy Operation manual, and applicable
		pump manual.
		Check board calibration and recalibrate if
		necessary. See ProMix Easy Operation
		manual.
		Replace sensors. See pump manual
		310671 or 310672.
	Pump cavitating excessively.	Check for air in lines caused by loose fit-
		ting or use of agitator.
		Material too viscous. Use heater.

10 309909H