Troubleshooting
10 3A1222B
Troubleshooting
Problem Cause Solution
Pump will not prime
HINT:
• Attempt to free check balls by
pushing pump priming button.
• Attempt to free check balls by
tapping side of inlet valve as
sprayer is stroking.
• Strain paint before spraying.
Keep sand and debris out.
• Thoroughly flush after every
paint job.
• Do not store in water. Use
Pump Armor or mineral
spirits.
Prime/Spray valve set at SPRAY. Turn Prime/Spray valve to PRIME.
Inlet screen clogged. Clean debris off inlet screen.
Suction tube is not immersed. Reposition suction tube in bottom of paint pail.
Inlet valve check ball stuck. Press pump priming button two times to dislodge the
ball.
Remove tube. Insert end of pencil into inlet section to
dislodge ball. Press pump priming button, page 6. OR
Power Flush unit.
Outlet valve check ball stuck. Unscrew outlet valve. Remove and clean assembly.
Suction tube is leaking. Tighten suction tube connection. Inspect for cracks or
vacuum leaks.
Prime/Spray valve clogged. Clean/replace drain tube as necessary. Return sprayer
to Graco/M
AGNUM authorized service center if drain
valve is clogged.
Power switch is on and sprayer is
plugged in but pump does not
cycle.
Pressure set at minimum. Turn pressure control knob right to increase pressure.
Electrical outlet is not providing
power.
• Try a different outlet OR test outlet by plugging
something in that you know is working.
• Reset building circuit breaker or replace fuse.
Damaged extension cord. Replace extension cord. See Grounding Instructions,
page 5.
Damaged sprayer electrical cord. Check for broken insulation or wires. Replace damaged
electrical cord.
Motor or control damaged. Return sprayer to authorized Graco service center.
Paint frozen or hardened in pump. Unplug sprayer from electrical outlet.
If paint if frozen in sprayer:
Do NOT try to start frozen sprayer. Thaw completely or
you may damage motor, control board and/or drivetrain.
1 Turn OFF power switch.
2 Place sprayer in warm area for several hours.
3 Plug in and turn on sprayer.
4 Slowly increase pressure until motor starts.
If paint hardened in sprayer:
1 Replace pump packings.
2 Remove all residue from valves and passages.
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