Troubleshooting. Graco 309298E, PRO Auto Xs AA, Automatic Electrostatic Air Assisted Spray gun

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Troubleshooting. Graco 309298E, PRO Auto Xs AA, Automatic Electrostatic Air Assisted Spray gun | Manualzz

Troubleshooting

Troubleshooting

WARNING WARNING

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 properly. Do not install or repair this equipment unless you are trained and qualified.

Skin Injection Hazard

To reduce the risk of a fluid injection injury,

always follow the Pressure Relief Proce-

dure on page 18 before doing any mainte-

nance or service on this gun or system.

Check all possible remedies in the Troubleshooting

Chart before disassembling the gun.

Spray Pattern Troubleshooting

Some spray pattern problems are caused by the improper balance between air and fluid.

Problem

Fluttering or spitting spray.

Cause

No fluid.

Air in fluid supply.

Solution

Refill supply.

Check fluid source. Refill.

Irregular pattern.

Fluid buildup; partially plugged tip.

Clean. See page 26.

Worn/damaged tip or air cap holes.

Clean or replace.

Pattern pushed to one side; air cap gets dirty.

Tails in pattern.

Air cap holes plugged.

Atomization air pressure too low.

Fluid pressure too low.

Clean. See page 26.

Increase atomization air pressure.

Increase.

Fluid buildup on air cap/tip guard.

Atomization air pressure too high.

Fluid pressure too low.

Decrease.

Increase.

32 309298E

Troubleshooting

Gun Operation Troubleshooting

Problem

Excessive spray fog.

“Orange Peel” finish.

Fluid leaks from the fluid packing area

Air leaks from the air cap

Fluid leakage from the front of the gun

Gun does not spray

Paint buildup on air cap

Air leaks from manifold

Fluid doesn’t shut off properly.

Cause Solution

Atomization air pressure too high.

Fluid too thin.

Atomization air pressure too low.

Decrease air pressure as low as possible.

Increase viscosity.

Increase air pressure; use lowest pressure necessary.

Use smaller tip; see page 52.

Remix or refilter fluid.

Spray tip (4) too large.

Poorly mixed or filtered fluid.

Fluid too thick.

Reduce viscosity.

Worn fluid needle packings or shaft.

Replace fluid needle assembly (8);

see page 41.

Worn piston stem o-rings (34e, 34f).

Replace; see page 42.

Worn or damaged fluid needle (8).

Replace; see page 41

Worn fluid seat housing (5).

Loose spray tip (4).

Damaged tip seal (4a).

Low fluid supply.

Dirty or clogged spray tip (4).

Damaged spray tip (4).

Replace; see page 37.

Tighten retaining ring (1); see page

37.

Replace; see page 37.

Add fluid if necessary.

Clean; see page 37.

Replace; see page 37.

Damaged fluid needle (8).

Piston (34) not actuating.

Replace; see page 41.

Check cylinder air. Check piston

u-cup (34d); see page 48.

Actuator arm (29) is out of position.

Check actuator arm and nuts. See

page 43.

Atomization air pressure too high.

Reduce.

Dirty air cap.

Manifold is not tight.

Worn or missing o-rings.

Seat housing (5) too tight.

Fluid buildup on fluid needle (8).

Piston sticking.

Clean; see page 37.

Tighten manifold screws (106).

Replace o-rings. See page 43.

Replace; see page 37.

Replace needle; see page 41.

Clean or replace o-rings. See page

43.

309298E 33

Troubleshooting

Electrical Troubleshooting

Problem Cause Solution

Poor wrap.

Turbine air is not turned on.

Booth exhaust velocity is too high.

Atomization air pressure too high.

Turn on.

Reduce velocity to within code limits.

Decrease.

Fluid pressure too high.

Decrease.

Incorrect distance from gun to part.

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

Poorly grounded parts.

Faulty gun resistance.

Resistance must be 1 megohm or less. Clean workpiece hangers.

See Test Gun Resistance on page

29.

Low fluid resistivity.

Fluid leaks from the packing (8d) and causes a short.

Check fluid resistivity, page 17.

Clean the packing rod cavity.

Replace the packing rod. See page

41.

No voltage or low voltage reading on the gun ES display module

Operator gets mild shock.

Faulty turbine alternator.

The KV switch is stuck on low.

Be sure the plug is in place on the back of the turbine alternator housing. Remove and test the turbine

alternator. See page 47.

Check the switch actuation; replace if needed.

No power.

Damaged fiber optic cable or connection.

Turbine air is not turned on.

Poor wrap.

Replace power supply. See page 46.

Check; replace damaged parts.

Turn on.

See causes and solutions under Poor

Wrap, above.

Operator not grounded or is near ungrounded object.

Gun not grounded.

See Grounding on page 15.

Operator gets shock from workpiece. Workpiece not grounded.

See Check Electrical Grounding on

page 16 and Test Gun Resistance on page 29.

Resistance must be 1 megohm or less. Clean workpiece hangers.

34 309298E

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