Graco 247937 Electrical Troubleshooting, Electric Shock Hazard, See Test Total Gun Resistance on

Page 22

Electrical Troubleshooting

Electrical Troubleshooting

Electric Shock Hazard

Installing and servicing this equipment requires access to parts which may cause an electric shock or other serious injury if the work is not performed prop- erly. Do not install or repair this equipment unless you are trained and qualified.

NOTE: Check all possible remedies in the Troubleshoot- ing Chart before disassembling the gun.

Problem

Cause

Solution

 

 

 

Poor wrap.

ES ON/OFF valve OFF (0).*

Turn ON (I).

 

 

 

(In general, a Pro Xs Waterborne gun

Gun air pressure too low.

Check air pressure to gun; minimum

will have less wrap than a Pro Xs

 

40 psi (0.28 MPa, 2.8 bar) needed at

solventborne gun.)

 

gun for full voltage.

 

 

 

 

Atomizing air pressure too high.

Decrease.

 

 

 

 

Fluid pressure too high.

Decrease.

 

 

 

 

Incorrect distance from gun to part.

Should be 8-12 in. (200-300 mm).

 

 

 

 

Poorly grounded parts.

Resistance must be 1 megohm or

 

 

less. Clean workpiece hangers.

 

 

 

 

Faulty gun resistance.

See Test Total Gun Resistance on

 

 

page 23.

 

 

 

 

Faulty turbine alternator.

Be sure the plug is in place on the

 

 

back of the power supply housing.

 

 

Remove and test the turbine alterna-

 

 

tor. See page 33.

 

 

 

 

The KV HI-LO lever is on LO.

Check the lever actuation; replace if

 

 

needed.

 

 

 

ES indicator or voltage/current dis-

ES ON/OFF valve OFF (0).*

Turn ON (I).

play is not lit.

 

 

 

 

 

 

No power.

Replace power supply. See page 32.

 

 

 

Voltage/current display stays red

Gun too close to part.

Should be 8-12 in. (200-300 mm).

(smart guns only).

 

 

 

 

 

 

Dirty gun.

Clean. See Maintenance on page

 

 

20.

 

 

 

Operator gets mild shock.

Operator not grounded or is near

See Grounding on page 14.

 

ungrounded object.

 

 

 

 

 

Gun not grounded.

See Check Electrical Grounding on

 

 

page 15 and Test Total Gun Resis-

 

 

tance on page 23.

 

 

 

Operator gets shock from workpiece.

Workpiece not grounded.

Resistance must be 1 megohm or

 

 

less. Clean workpiece hangers.

 

 

 

* ES indicator light is off when the gun is triggered.

22

312900G

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Contents PRO Xs Waterborne Air Spray Gun II 2 G EEx 0.24 mJTable of Contents FIRE, EXPLOSION, and Electric Shock Hazard Equipment Misuse Hazard Smart Model 247937 OverviewHow the Electrostatic Air Spray Gun Works Standard Model 247936Air swivel inlet. Left-hand thread Fan air adjustment valve. Adjusts fan size ES indicator 247936 only. Green when ES is on Install the System InstallationVentilate the Spray Booth Typical Installation Key Connect the Charging Probe Connect the Air LineGrounded Air Supply Hose Connect the Fluid Line Connect the Exhaust TubeFilter the Fluid Select a Fluid Nozzle and Air Cap Orifice SizeGrounding Fire, Explosion, and Electric Shock HazardCheck Electrical Grounding Check Fluid ResistivityCheck Fluid Viscosity Prepare to PaintTurn ES ON/OFF switch on Flush Shutdown Pressure ReliefPressurized Equipment Hazard Maintenance Clean Gun DailyDaily System Care See Test Total Gun Resistance on Electrical TroubleshootingElectric Shock Hazard See Check Electrical Grounding onTest Total Gun Resistance Electrical TestsTest Gun Resistance Test Charging Probe ResistanceTest Power Supply Resistance Test Barrel ResistanceSpray Pattern Troubleshooting Gun Operation Troubleshooting Gun Repair Prepare the Gun for RepairReplace Air Cap/Nozzle Replace Fluid NeedleRemove Fluid Packing Remove Fluid PackingRepair Packing Rod Packing RodInstall Barrel Remove BarrelRemove and Replace Power Supply Power SupplyRepair Fan Air Adjustment Valve Remove and Replace Turbine AlternatorRepair Fluid Adjustment Valve Repair Air ValveRemove and Replace Atomizing Air Restrictor Valve Repair ES ON/OFF ValvePart No 60 kV Electrostatic Gun, Series a Standard model PartsRef. No Multi-tool Part No 60 kV Electrostatic Gun, Series a Smart model Ref. No ES ON/OFF Valve Ref. No Alternator Ref. No Fan Adjustment ValveRef. No Packing Rod Smart Model controlsDescription Qty Description Qty Air Line Accessories AccessoriesFluid Line Accessories Gun Accessories Miscellaneous AccessoriesTechnical Data Category DataGraco Warranty Graco Information
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