Graco 334466A Troubleshooting, Mechanical/Fluid Flow, Refer to this column

Page 30

Troubleshooting

Troubleshooting

Mechanical/Fluid Flow

1.Follow Pressure Relief Procedure, page 13, before checking or repairing.

2.Check all possible problems and causes before disassembling the unit.

	What to Check	What to Do
	If check is OK, go to next	When check is not OK,
Problem	check	refer to this column

For units with display:	Fault condition exists.	Determine fault correction from
E=0X is displayed.		Electrical , page 33.
For units with no display: Control
board status light is blinking or the
light is off and there is power to the
sprayer.

Pump output is low	Spray tip worn.	Follow Pressure Relief Procedure,
		page 13, then replace tip. See
		separate gun or tip manual.

	Spray tip clogged.	Relieve pressure. Check and clean
		spray tip.

	Paint supply.	Refill and reprime pump.

	Intake strainer clogged.	Remove and clean, then reinstall.

	Intake valve ball and piston ball are	Remove intake valve and clean.
	not seating properly.	Check balls and seats for nicks;
		replace if necessary. See pump
		manual. Strain paint before using to
		remove particles that could clog
		pump.

	Fluid filter or tip filter is clogged or	Clean filter.
	dirty.

	Prime valve leaking.	Follow Pressure Relief Procedure,
		page 13, then repair prime valve.

	Verify pump does not continue to	Service pump. See pump manual.
	stroke when gun trigger is released.
	(Prime valve not leaking.)

	Leaking around throat packing nut	Replace packings. See pump manual.
	which may indicate worn or damaged	Also check piston valve seat for
	packings.	hardened paint or nicks and replace if
		necessary. Tighten packing
		nut/wet-cup.

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334466A

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Contents SG3 Related ManualsContractor/FTx 334599Contents Hi-Boy Stand Lo-BoyModel Grounding Extension CordsFire and Explosion Hazard Equipment Misuse Hazard Personal Protective Equipment Component Identification Stand ModelsLo-Boy Models Hi-Boy Models Hi-Boy Models Extension Cords Power RequirementsGrounding PailsPressure Relief Procedure Trigger Lock Setup 334466ATi24638a Make certain ON/OFF switch is OFF Turn prime valve horizontal. Disengage trigger lock Perform Pressure Relief Procedure, Startup20 s Ti24652a Operation Spray Tip InstallationPerform Pressure Relief Procedure, SprayClear Tip Clog Pressure Display Perform Pressure Relief Procedure, Digital DisplayStored Data Display Ti2824a Cleanup Raise fluid intake above flushing fluid Ti24719a Maintenance Activity IntervalTroubleshooting Mechanical/Fluid FlowRefer to this column Holders Dust with a small cleaning brush Properly installed to allow fullClockwise position. If problem Piston packings are worn orFluid supply is low or empty Possible during primingSpray tip is partially clogged Pump manual. Check fluid supplyProblem What to Check How to check ElectricalSprayer does not run at all Check transducer or transducer Install new transducer. ConnectAre clean and secure ConnectionsSize. Locate the two wires Contacts are clean and secureVolt battery to the motor Should spin when battery isOhms Motor thermal device When cool, correct cause BoardDisplay shows E=06 Motor. Check both brushes Basic electrical problemsReplace loose terminals crimp to Rest squarely on top of brush Motor brushes may be bindingSprayer Will Not Run Sprayer Will Not RunStep Troubleshooting Procedure Sprayer Will Not Shut OffStand Sprayers Torque Stand Sprayers Parts List Ref. Part DescriptionQty Lo-Boy Sprayers Models 17C3156040 132 Lo-Boy Sprayers Parts List Models 17C315 Ref. Part DescriptionHi-Boy Sprayers Models 17C317, 17C362, 17C40840 44 117 Hi-Boy Sprayers Parts List Models 17C317, 17C362, 17C408 Ref. Part DescriptionAccessories and Labels Alert Control Box Control Box Parts List GrommetWiring Diagrams 120V, US/Japan110V, UK TP1 TP2Technical Specifications Ultra 395 PC / Ultra 395 PC ClassicMetric Materials of Construction Graco Standard Warranty For Graco Canada CustomersGraco Information International Offices Belgium, China, Japan, Korea