Table of Contents
Advertisement
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
F
. 8 on page 17), or place the control assembly in
IG
the MANUAL mode of operation using the CON-
TROL SELECT switch. (See F
Table 3. Troubleshooting
Problem
No material being dispensed
Material dispensing but not swirling
(Motor fault light is on)
Material dispensing but not swirling
(Motor fault light is off)
Motor is rotating but poor swirl pat-
tern or change in bead size
310554V
. 12 on page 22.)
IG
Cause
Clogged nozzle
No material or pressure
Broken or clogged dispense tube
Fault in dispense valve
Motor not operating
Control assembly failure
Orbiter bearing failure
Material accumulating on nozzle
Flow rate has changed
Motor speed has changed
Material viscosity has changed
Partially clogged nozzle
Troubleshooting
Solution
Change nozzle.
Check fluid delivery system.
Rebuild the orbital dispenser.
Refer to Dispense Valve manuals
308876 or 309376.
Check wiring connections and cable.
Tube bearing defective; replace tube
bearing.
Motor defective; replace motor.
Check for fluid leak.
Check analog voltage control setting
and enable signal.
Check RPM setting.
Check power and fuses.
Check wiring.
Replace bearing.
Clean nozzle.
Check flow rate.
Check analog speed signal.
Check material parameters.
Clean nozzle.
25
Advertisement
Table of Contents
