Graco Standard Series Operation, Parts page 30

Troubleshooting
Problem
Electric motor does not work
properly
Gas engine / electric motor
operates but displacement
pump does not operate
30
Cause
Incorrect power source
Low voltage to motor
3 phase motors: A phase of
three phase power has open
circuit
Faulty motor
Hydraulic pump valve is OFF
Pressure setting too low
Displacement pump outlet filter
(if used) is dirty or clogged
Tip or tip filter (if used) is
clogged
Hydraulic fluid too low
Belt is off pulley, worn or broken
Hydraulic pump worn or
damaged
Dried paint seized paint pump
rod
Hydraulic motor not shifting
For 3 Phase electric motor
only: Red phase sequence light
is ON, indicating motor rotating
in the wrong direction
Solution
Have a certified electrician or
authorized Graco Repair Center
evaluate and repair.
See Technical Data, pages
60-63.
Have a certified electrician or
authorized Graco Repair Center
evaluate and repair.
See Technical Data, pages
60-63.
Have a certified electrician or
authorized Graco Repair Center
evaluate and repair.
See Technical Data, pages
60-63.
Have a certified electrician or
authorized Graco Repair Center
evaluate and repair.
See Technical Data, pages
60-63.
Set hydraulic pump valve ON.
Increase pressure, page 20.
Clean the filter.
Remove tip and/or filter and
clean.
Shut off sprayer. Add fluid*.
Replace. See Repair manual.
Bring sprayer to Graco
distributor for repair.
Service pump. See manual
334654
Set pump valve OFF. Turn
pressure down. Turn engine
OFF. Pry rod up or down until
hydraulic motor shifts. See
Repair manual.
Remove plug from receptacle
and rotate plug phase screw.
See Operation manual.
334606B