Graco Inc 224200, 308131, 224400 Electrical Troubleshooting, See Check the Electrical Grounding

Page 18

Troubleshooting

Electrical Troubleshooting

Problem

Cause

Solution

Poor wrap-around

The ES ON-OFF lever is in the OFF (O) position.*

Turn the lever to ON (1).

The distance between the gun and work-

Adjust the spraying distance to 8 to 12 inches

piece is incorrect.

(203 to 305 mm)

 

 

The parts are poorly grounded.

Clean the workpiece hangers. Check for

 

proper grounding on the conveyer or track.

The booth exhaust velocity is too high.

Reduce exhaust velocity within code limits.

 

 

The atomizing air pressure is too high.

Reduce the atomizing air pressure.

 

 

The fluid pressure is too high.

Reduce the fluid pressure.

 

 

The fluid viscosity is not right for electros-

Check with the supplier for proper fluid viscos-

tatic spray.

ity for electrostatic spray.

 

 

The fluid resistivity is too low.

Check the fluid resistivity with a paint meter

 

and probe.

The turbine alternator is not operating.*

Check if the ES ON-OFF lever is ON (1). Check the air supply to the gun. Check for dirt or moisture in the turbine. See page 28.

 

The gun resistance is faulty.

Check the gun resistance. See page 20.

 

 

 

 

Fluid leaks from the needle packing and

Clean the needle cavity. Replace the fluid

 

causes a short.

needle. See page 26.

 

 

 

 

The turbine alternator is faulty.

Be sure the plug is in place on the back of the

 

 

turbine alternator housing. Remove and test

 

 

the turbine alternator. See page 28.

 

The KV HI-LO lever is on LO.

Check the lever actuation; replace if needed.

 

 

 

Operator gets a mild shock

The operator is not properly grounded or

Be sure the floor and the operator are properly

 

is near an ungrounded object.

grounded. See Ground the System, page 8.

 

 

 

 

The gun is not properly grounded.

See Check the Electrical Grounding,

 

 

page 9.

 

 

 

Operator gets a shock when touching the workpiece

The workpiece is not properly grounded.

Clean workpiece hangers. Check for proper grounding on the conveyor or track.

* ES indicator light is not on when the gun is triggered.

18 308131

Image 18
Contents Part No , Series B Air Spray Gun with four-finger trigger 308131Part No , Series B Air Spray Gun with two-finger trigger Read and Keep for Reference308131 Table of Contents SymbolsFIRE, EXPLOSION, and Electric Shock Hazard Pressurized Equipment Hazard Hazardous Area InstallationNon-Hazardous Area KEYInstalling the System Ventilate the Spray BoothConnect the Air Line Refer to Fig Connect the Exhaust Tube Ground the SystemFIRE, EXPLOSION, Electric Shock Hazard Check the Electrical Grounding See Fig Page Operation Pressure Relief ProcedureOperating Checklist Filter the FluidSelecting a Fluid Nozzle and Air Cap Operating the Spray GunComponent Rupture Hazard Atomizing Air Valve Adjustment Fine Adjustments of the Spray GunShutdown MaintenanceDaily Care and Cleaning FIRE, EXPLOSION, and Electric Shock HazardFlush the Spray Gun Clean the Air Cap and Fluid NozzleProcedure Equipment neededTroubleshooting Spray Pattern TroubleshootingProblem Cause Solution Gun Operation Troubleshooting Electrical Troubleshooting See Check the Electrical GroundingElectrical Troubleshooting with SVR Electrical Tests Test Gun Resistance See FigTest Power Supply Resistance See Fig Test Resistor Stud Resistance See FigService Prepare the Gun for ServiceAir Cap/Nozzle/Resistor Stud Replacement Electrode Needle Replacement Barrel Removal Fluid Packing Removal Fluid Packing Rod Repair Power Supply Removal and Replacement Power Supply AdjustmentTurbine Alternator Removal Replacement Barrel InstallationFan Air Adjustment Valve Repair DetailFluid Adjustment Assembly Repair 45c 45a  45b  45d  41 45eAtomizing Air Valve Removal and Replacement Air Trigger Valve RepairES ON-OFF Valve Repair Moving Parts Hazard308131 Parts Detail aPart No , Series B Electrostatic Air Spray Gun, with four-finger triggerExtended Air Fitting AccessoriesConductive Air Supply Hose black Air Shutoff ValveFluid Hose Assemblies Nylon Grounding Clamp and WireSafety Warning Signs MegohmmeterGUN Systems Gun SystemCategory Data Technical DataManual Change Summary FCC ID JHI1Graco Standard Warranty Graco Phone NumberToll Free