Troubleshooting
24 312001B
Troubleshooting
Check everything in this Troubleshooting Table before you bring the sprayer to a Graco/MAGNUM authorized service
center.
Problem Cause Solution
Power switch is on and sprayer is plugged in,
but motor does not run, and pump does not
cycle.
Pressure is set at zero pressure. Turn Pressure Control Knob clockwise to
increase pressure setting.
Motor or control is damaged. Take sprayer to Graco/M
AGNUM authorized ser-
vice center.
Electric outlet is not providing power. • Try a different outlet or plug in something
that you know is working to test outlet.
• Reset building circuit breaker or replace
fuse.
Extension cord is damaged. Replace extension cord. Read Grounding and
Electric Requirements, page 5.
Sprayer electric cord is damaged. Check for broken insulation or wires. Replace
electric cord if damaged.
Paint and/or water is frozen or hardened in
pump.
Unplug sprayer from outlet. If frozen do NOT
try to start sprayer until it is completely thawed
or you may damage the motor, control board
and/or drivetrain.
Make sure power switch is OFF. Place sprayer
in a warm area for several hours. Then plug in
power cord and turn sprayer ON. Slowly
increase pressure setting to see if motor will
start.
If paint is hardened in sprayer, pump packings,
valves, drivetrain or pressure switch may need
to be replaced. Take sprayer to Graco/M
AGNUM
authorized service center.
Pump does not prime. Prime/Spray Valve is in SPRAY position. Turn Prime/Spray Valve to PRIME position
(pointing down).
Inlet screen is clogged or suction tube is not
immersed.
Clean debris off inlet screen and make sure
suction tube is immersed in fluid.
Inlet valve check ball is stuck. Remove suction tube and place a pencil into
the inlet section to dislodge the ball, allowing
pump to prime properly. OR Power Flush
sprayer, page 17.
Outlet valve check ball is stuck. Insert screw driver in slot and remove
Easy-Access
™
door, page 6. Unscrew outlet
valve with a 3/4 in. socket. Remove and clean
assembly.
Inlet valve check ball or seat is dirty. Remove inlet fitting. Clean or replace ball and
seat.
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