ELECTRICAL TROUBLESHOOTING CHART 
PROBLEM | CAUSE | SOLUTION |
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Poor wrap±around. | *ES ON±OFF lever in OFF position. | Turn lever to ON. |
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| Improper distance between gun | Adjust spraying distance to |
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| and workpiece. | 203±305 mm (8±12 in.). |
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| Parts poorly grounded. | Clean hangers, check for proper |
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| ground on conveyer or track. |
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| High booth exhaust velocity. | Reduce within code limits. |
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| Atomizing air pressure too high. | Reduce air pressure. |
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| Fluid pressure too high. | Reduce fluid pressure. |
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| Fluid viscosity. | Check supplier for proper fluid for |
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| electrostatic spray. |
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| Fluid resistivity too low. | Check fluid resistivity with paint |
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| meter and probe. |
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| *Turbine alternator not operating | Check if ES ON±OFF lever is ON. |
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| (no audible whine). | Check air supply to gun. Check for |
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| dirt or moisture in turbine. See |
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| page 23. |
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| Faulty gun resistance. | Check gun resistance. See page 16. |
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| Faulty resistor stud resistance. | Check resistor stud resistance. |
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| See page 17. |
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| Faulty power supply resistance. | Check power supply resistance. |
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| See page16. |
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| Faulty needle electrode assembly. | Replace needle electrode assembly. |
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| See page 18. |
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| *Faulty turbine alternator. | Be sure plug is in place on back of |
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| turbine alternator housing.Remove |
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| and test turbine alternator. See |
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| page 23. |
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Operator gets mild | Operator not properly grounded | Be sure floor is properly grounded. |
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shock. | or is in contact with ungrounded | Wear shoes with conductive soles |
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object. | and wear personal grounding straps. |
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| Be sure operator is not in contact |
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| with or carrying any metalic items |
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| which could build up electrical |
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| charge. If worn, a glove must be |
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| conductive or modified as shown on |
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| page 9. |
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| Gun not properly grounded. | See Check the Electrical Grounding, |
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| page 8. Be sure Graco air supply hose |
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| is being used and is properly grounded. |
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Operator gets mild | Work piece not properly | Clean work piece hangers. Check |
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shock when touching | grounded. | for proper ground on conveyor or |
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| track. |
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work piece. |
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*ES indicator light not on when gun is triggered.
768 15
