Troubleshooting
Voltage Loss Troubleshooting (continued)
11.A dielectric breakdown is most likely in one of the following three areas. Repair or replace the com- ponent that is failing.
D Fluid hose
DFluid packings
Remove the packing assembly from the gun as instructed on page 33, and look for signs of fluid leakage or any blackened areas, which would indicate arcing is occurring along the packing rod.
DFluid hose connection joint to the spray gun
Check for leakage or any bulges in the outer jacket, which may indicate a
Inspect the end of the hose connected to the voltage block. Look for cuts or nicks.
Make sure the hose is properly stripped; see Fig. 4, page 12, for hose stripping dimensions. Restrip or replace the hose.
A breakdown at the fluid hose connection joint would be caused by fluid leaking past the
12.Before reassembling the gun, clean and dry the gun fluid inlet tube (item 75 on page 46). Repack the inner spacer of the fluid packing rod with dielectric grease and reassemble the gun as instructed on page 34.
13.Reconnect the fluid hose as instructed on page 12.
14.Check the gun voltage with the voltage probe and meter before filling the gun with fluid.
Electrical Troubleshooting
Problem | Cause | Solution |
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Voltage is still present at the gun | Gun electrostatics (gun ES lever) are | Turn off the gun electrostatics. |
after following the Fluid Voltage | not turned off. |
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Discharge and Grounding Pro- |
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cedure |
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| Did not wait long enough for the volt- | Wait a longer period of time before |
| age to discharge through the voltage | touching the electrode with a |
| bleed resistor. | grounded rod. Check for possible |
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| bleed resistor failure. |
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| There is an air pocket in the fluid line | Determine the cause of the air pocket |
| that leaves the fluid near the gun | and fix the problem. Purge the air out |
| isolated. | of the fluid line. |
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| Voltage isolation system failed. | See the isolation system manual for |
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| service information. |
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The operator gets a shock | The operator is not properly grounded | Be sure the floor and the operator are |
| or is near an ungrounded object. | properly grounded; see Ground the |
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| System, page 14. |
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| The gun is not properly grounded. | See Check the Electrical Ground- |
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| ing, page 15. |
The operator gets a shock when | The workpiece is not properly | Clean the workpiece hangers; check |
touching the workpiece | grounded. | for proper grounding on the conveyor |
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| or track |
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