Graco 310554V important safety instructions Troubleshooting Problem Cause Solution

Troubleshooting

Troubleshooting

Some solutions require disassembling the dispense valve or orbital dispenser. Always relieve system pressure before performing these procedures.

Table 3 provides troubleshooting information. For other troubleshooting situations, call your Graco distributor.

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pres- sure Relief Procedure (see manual 309043).

To reduce the risk of serious injury whenever you are instructed to remove, change, check, clean, or han- dle the nozzle in any manner, always disconnect the motor control cable from the control assembly (see FIG. 8 on page 17), or place the control assembly in the MANUAL mode of operation using the CON- TROL SELECT switch. (See FIG. 12 on page 22.)

Table 3. Troubleshooting

Problem	Cause	Solution
No material being dispensed	Clogged nozzle	Change nozzle.
	No material or pressure	Check fluid delivery system.
	Broken or clogged dispense tube	Rebuild the orbital dispenser.
	Fault in dispense valve	Refer to Dispense Valve manuals
		308876 or 309376.
Material dispensing but not swirling	Motor not operating	Check wiring connections and cable.
(Motor fault light is on)
		Tube bearing defective; replace tube
		bearing.
		Motor defective; replace motor.
		Check for fluid leak.
	Control assembly failure	Check analog voltage control setting
		and enable signal.
		Check RPM setting.
		Check power and fuses.
		Check wiring.
	Orbiter bearing failure	Replace bearing.
Material dispensing but not swirling	Material accumulating on nozzle	Clean nozzle.
(Motor fault light is off)
Motor is rotating but poor swirl pat-	Flow rate has changed	Check flow rate.
tern or change in bead size
	Motor speed has changed	Check analog speed signal.
	Material viscosity has changed	Check material parameters.
	Partially clogged nozzle	Clean nozzle.

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