Troubleshooting
3A8429B 41
When paint is sprayed, coverage
is inadequate.
Material is going on too thin. Move gun slower.
Choose spray tip with larger hole
size.
Choose spray tip with narrower
fan.
Make sure gun is close enough
to surface.
Fan pattern varies dramatically
while spraying.
Pressure control switch is worn
and causing excessive pressure
variation.
Take sprayer to Graco
authorized service center.
Cannot trigger spray gun. Spray gun trigger lock is
engaged.
Rotate trigger lock to disengage
trigger lock. See page 9.
Paint is coming out of pressure
control.
Pressure control is worn. Take sprayer to Graco
authorized service center.
Paint is leaking through drain
tube.
Sprayer is over pressurizing. Take sprayer to Graco
authorized service center.
Paint leaks down outside of
pump.
Pump packings are worn. Replace pump packings with
new ProXChange module. See
page 35.
Motor is hot and runs
intermittently. Motor
automatically shuts off due to
excessive heat. Damage can
occur if cause is not corrected.
Vent holes in enclosure are
plugged or sprayer is covered.
Keep vent holes clear of
obstructions and overspray and
keep sprayer open to air.
Battery has insufficient charge. Charge battery.
Motor needs to be replaced. Take sprayer to Graco
authorized retailer, distributor, or
service center.
Sprayer makes no sound when
pressure control is ON and
ON/OFF switch is ON (illumi-
nated).
ON/OFF switch light blinks two
times when pressure control is
ON. Indicates incorrect voltage.
Replace battery with charged
battery.
Battery has reached end of life.
Replace battery.
Motor damaged, replace motor
assembly.
ON/OFF switch light blinks three
times when pressure control is
ON. Indicates battery
temperature is too hot or too
cold.
Allow battery to cool down or
warm up to room temperature.
ON/OFF switch light blinks four
times when pressure control is
ON. Indicates locked rotor
condition.
Replace pump and/or motor
assembly.
ON/OFF switch light blinks five
times when pressure control is
ON. Indicates motor temperature
is too hot.
Allow motor to cool down to room
temperature.
ON/OFF switch does not illumi-
nate when pressed.
Indicates battery is not installed,
has insufficient charge, or is
damaged.
Install battery correctly, ensure
battery is fully charged, or
replace battery.
Control board is damaged. Replace control board.
Power switch is damaged. Replace power switch.
ON/OFF switch is constantly illu-
minated (does not turn off).
Control board is damaged. Replace control board.
Problem Cause Solution
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