Graco EQ300C manual If flushing does not solve the problem, see

Page 25

		Troubleshooting

Problem	Cause	Solution

A strong hose recoil occurs	The unit is not on a level surface.	Place the unit on a level surface. If this
frequently when the blast		is impossible, the Auto-Vent must be on
control switch is engaged.		the higher side of the unit.
	The initial pot pressure is not set	Confirm that the auto-vent valve is
	correctly.	working and set initial pot pressure 30
		psi (2.0 bar, 0.20 MPa) above the blast
		pressure.
	The Auto-Vent is malfunctioning.	Perform auto-vent clean-
		ing procedure (see
		Cleaning the Auto-Vent Valve, page 31).
	The diaphragm needs to be	Perform the diaphragm
	flushed.	flush procedure (see
		Flushing the Diaphragm Valve, page 29).
		If flushing does not solve the problem, see
		Repairing the Diaphragm Valve, page 30.

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Contents EcoQuip Vapor Abrasive Blast System Important Safety InstructionsRelated Manuals ModelsDust and Debris Hazard Burn Hazard Metric OEM System GuidelinesCompressor Size and Hose Length Minimum ID Metric EQ300C and EQ600C System Component IdentificationKey DataTrak ControlsDataTrak see DataTrak Controls, Pressure Relief Procedure Operation Checklist Before StartingConnecting the Blast Hose and Air Hose Setting Up the Equipment 10 gal 200-500 lb Ti24824a 0 0 0 8 8 0 0 0 3 Blasting on Higher Surfaces Blasting TipsGrit Size Blast Pressure Abrasive Dose Blast Angle General Metering Valve SettingsWood SteelUsing the Wash Feature Refilling the Pot with Abrasive Shutting Down Operation Winterizing the Equipment Problem Cause Solution TroubleshootingSee Cleaning the Auto-Vent Valve, See Repairing the Main Air RegulatorSee Repairing the Diaphragm Valve See Setting Up the Equipment,Procedure see Shutting Down, Intact. See Hose Schematic,Metering Valve Settings, Properly. See Hose Schematic,See Pressure Relief Procedure, Setting Up the Equipment,If flushing does not solve the problem, see Checking for Leaks Troubleshooting ExamplesPneumatic Blast Control Circuit Perform Pressure Relief Procedure, Repairing the Main Air RegulatorRepair Flushing the Diaphragm Valve Perform the Pressure Relief Procedure, Repairing the Diaphragm ValveCleaning the Auto-Vent Valve Replace Battery Replacing the DataTrak BatteryApproved Batteries Replace Fuse Replacing the DataTrak FuseApproved Fuses DataTrak Part Series Letter Fuse Required EQ300C and EQ600C PartsPressure POT EQ300C and EQ600C Parts ListEnclosure Part Description Qty Enclosure Parts ListPressure Pot Pressure Pot Parts ListRef. Part Description Qty Hose Schematic EcoQuip Skid Systems Vapor Abrasive Blast Systems and AccessoriesEcoQuip Trailer Systems Model Series BrakesTrailer Units Mobile/Skid UnitsModel Model DescriptionNozzles HosesModel Description Type Length Blast Control Common Spare Parts Other AccessoriesDimensions EQ300S Technical SpecificationsEQ600S Graco Information Graco Extended Warranty for EcoQuip Components