ELECTRICAL TROUBLESHOOTING CHART

PROBLEM

CAUSE

SOLUTION

 

 

 

 

 

Poor wrap±around.

*Turbine alternator not operating.

Check air supply to turbine. Check for

 

 

 

dirt or moisture in turbine. See page 23.

 

 

Improper distance between gun

Adjust spraying distance to

 

 

and workpiece.

203±305 mm (8±12 in.).

 

 

Parts poorly grounded.

Clean hangers, check for proper

 

 

 

ground on conveyer or track.

 

 

High booth exhaust velocity.

Reduce within code limits.

 

 

Atomizing air pressure too high.

Reduce air pressure.

 

 

Fluid pressure too high.

Reduce fluid pressure.

 

 

Fluid viscosity.

Check supplier for proper fluid for

 

 

 

electrostatic spray.

 

 

Fluid resistivity too low.

Check fluid resistivity with paint

 

 

 

meter and probe.

 

 

Faulty gun resistance.

Check gun resistance. See page 16.

 

 

Faulty resistor stud resistance.

Check resistor stud resistance.

 

 

 

See page 17.

 

 

Faulty power supply resistance.

Check power supply resistance.

 

 

 

See page16.

 

 

Faulty electrode.

Replace electrode. See page 18.

 

 

*Faulty turbine alternator.

Be sure plug is in place on back of

 

 

 

turbine alternator housing.Remove and

 

 

 

test turbine alternator. See page 23.

 

Operator gets mild

Operator not properly grounded or is in

Be sure floor is properly grounded.

 

shock.

contact with ungrounded object.

Wear shoes with conductive soles

 

 

 

or wear personal grounding straps.

 

 

 

Be sure operator is not in contact

 

 

 

with or carrying any metallic items

 

 

 

which could build up electrical charge.

 

 

Gun not properly grounded.

See Check the Electrical Grounding,

 

 

 

page 8. Be sure Graco electrically con-

 

 

 

ductive air supply hose is being used

 

 

 

and is properly grounded.

 

 

 

 

 

Operator gets mild

Work piece not properly

Clean work piece hangers. Check for

 

shock when touching

grounded.

proper ground on conveyor or track.

 

work piece.

 

 

 

 

 

 

 

*ES indicator light not on when gun is triggered.

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Page 15
Image 15
Graco Inc 307-712, PRO 5000, 218-745 manual Electrical Troubleshooting Chart, See Check the Electrical Grounding