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