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Troubleshooting
Troubleshooting
Problem
Pump will not prime
HINT:
•
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.
Power switch is on and sprayer is
plugged in but pump does not
cycle.
38
Cause
Prime/Spray valve set at SPRAY.
Inlet screen clogged.
Suction tube is not immersed.
Inlet valve check ball stuck.
Outlet valve check ball stuck.
Suction tube is leaking.
Prime/Spray valve clogged.
Pressure set at minimum.
Electrical outlet is not providing
power .
Damaged extension cord.
Damaged sprayer electrical cord .
Motor or control damaged.
Paint frozen or hardened in pump. Unplug sprayer from electrical outlet.
Solution
Turn Prime/Spray valve to PRIME.
Clean debris off inlet screen.
Reposition suction tube in bottom of paint pail.
Remove tube. Insert end of pencil into inlet section to
dislodge ball. OR Power Flush unit, page 20.
Use screw driver to open Easy-Access door. Unscrew
outlet valve. Remove and clean assembly.
Tighten suction tube connection. Inspect for cracks or
vacuum leaks.
Clean/replace drain tube as necessary. Return sprayer
to Graco/M
authorized service center if drain
AGNUM
valve is clogged.
Turn pressure control knob right to increase pressure.
•
Try a different outlet OR test outlet by plugging
something in that you know is working.
•
Reset building circuit breaker or replace fuse.
Replace extension cord. See Grounding and Electrical
Requirements, page 10.
Check for broken insulation or wires. Replace damaged
electrical cord.
Return sprayer to authorized Graco service center.
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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