10 309043
Troubleshooting
Check everything in this Troubleshooting table before you bring the sprayer to a Graco
authorized service center.
For Basic Troubleshooting , see the enclosed Operator’s Quick Guide.
PROBLEM CAUSE SOLUTION
Power switch (B) is on and
sprayer is plugged in, but
pump does not cycle.
Motor or control is damaged. Return sprayer to Graco authorized service center.
Pump cycles but does not
build up pressure.
Pump check valves are dirty or
damaged.
Clean or replace check valves. See Pump Check Valves on
page 12.
Spray/Prime valve is worn or
obstructed with debris
Return sprayer to Graco authorized service center.
Motor does not turn on when
sprayer is plugged in and
turned on.
Electrical outlet is not providing
power or extension cord is
damaged or sprayer power
cord is damaged.
Try a different outlet or reset building circuit breaker or replace
extension cord/power cord.
Paint is frozen or hardened in
pump.
Unplug sprayer from electrical outlet.
NOTE: If frozen, do not try to start sprayer until completely
thawed, or damage to motor, control board, and/or drivetrain
may occur.
Make sure power switch (B) is OFF. Place sprayer in warm area
for several hours, then plug in and turn on. Slowly increase
pressure setting to see if motor starts.
If paint hardened in sprayer, pump packings, valves, drivetrain,
or pressure switch may need to be replaced.
Pressure is set at maximum, but
Tip is too big for sprayer. Select a smaller tip. See Selecting a Tip Hole Size on page 6.
cannot achieve a good spray
pattern.
Tip is worn beyond capability
of sprayer.
Replace tip. See Installing Tip & Guard in enclosed Operator’s
Quick Guide.
Extension cord is too long or
not a heavy enough gauge.
Replace extension cord.
Gun fluid filter is clogged. Clean or replace gun fluid filter (V). See Gun Fluid Filter on
page 12.
InstaClean fluid filter is
clogged.
Clean or replace InstaClean fluid filter (E). See InstaClean
Fluid Filter on page 12.
Inlet screen is clogged. Clean debris off inlet screen (L).
Pump valves are worn. Check for worn pump valves as follows: Prime sprayer with
paint (see Priming in enclosed Operator’s Quick Guide). Trigger
gun momentarily. When trigger is released, pump should cycle
momentarily and stop. If pump continues to cycle, pump
valves may be worn. See Pump Check Valves on page 12.
When paint is sprayed, it runs
Coat is going on too thick. Move gun faster.
down the wall or sags.
Choose tip with smaller hole size.
Choose tip with wider fan.
Make sure gun is far enough from surface.
When paint is sprayed, coat is
Coat is going on too thin. Move gun slower.
not covering.
Choose tip with larger hole size.
Choose tip with narrower fan.
Make sure gun is close enough to surface.
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