Graco PRO 222700 Instructions Manual page 27

Gun Operation Troubleshooting (continued)
Excessive spray fog
No fluid sprays from the gun
The equipment is covered with
fluid
Dirty air cap
Troubleshooting
The air pressure is too high.
The fluid is thinned too much.
The fluid supply is low.
The fluid nozzle is dirty or clogged.
The fluid nozzle is damaged.
The exhaust air flow is insufficient or
not directed properly.
The distance between the gun and
workpiece is incorrect.
The electrode is bent.
The nozzle orifice is damaged.
The air cap and fluid nozzle are mis-
aligned.
Air
Cap
Fluid
Nozzle
ALIGNED MISALIGNED
Reduce the air cap air pressure by
closing the atomizing air valve more
or decreasing the gun air inlet pres-
sure; use the least air pressure
needed for good results. Do not re-
duce below minimum pressure need-
ed for full voltage. See page 18.
Properly thin the fluid.
Check the fluid supply; add fluid if
necessary.
Clean the fluid nozzle; see page 21.
Replace the fluid nozzle; see page
30.
Check for the proper CFM; check the
baffles and direction of the air flow.
Adjust the spraying distance to 8 to
12 inches (203 to 305 mm).
Straighten the electrode.
Replace the fluid nozzle; see page
30.
Check the air cap and fluid nozzle
seat for fluid buildup. Clean or
replace parts as needed; see page 21
or 30.