Graco 18H269 Operation Manual page 32

Troubleshooting
Problem
Pump is difficult to prime
Sprayer operates for 5 to 10
minutes then stops
Sprayer makes no sound when
pressure control is ON and
ON/OFF switch is ON
(illuminated)
ON/OFF switch does not
illuminate when pressed.
ON/OFF switch is constantly
illuminated (does not turn off).
32
What to Check
If check is OK, go to next
check
Air in pump or hose.
Intake valve is leaking.
Pump packings are worn.
Paint is too thick.
Pump packing nut too tight.
When pump packing nut is too
tight the packings on the
pump rod restrict pump action
and overloads the motor.
Battery has insufficient charge. Charge battery.
ON/OFF switch light blinks
two times when pressure
control is ON. Indicates
incorrect voltage.
ON/OFF switch light blinks
three times when pressure
control is ON. Indicates
battery temperature is too hot
or too cold.
ON/OFF switch light blinks
four times when pressure
control is ON. Indicates locked
rotor condition.
ON/OFF switch light blinks five
times when pressure control is
ON. Indicates motor
temperature is too hot.
Indicates battery is not
installed, has insufficient
charge, or is damaged.
Control board is damaged.
Power switch is damaged.
Control board is damaged.
What to Do
When check is not OK,
refer to this column
Check and tighten all fluid
connections. Cycle pump as
slowly as possible during
priming.
Clean intake valve. Be sure
ball seat is not nicked or worn
and that ball seats well.
Reassemble valve.
Replace pump packings. See
pump manual.
Thin the paint according to
supplier recommendations.
Loosen pump packing nut.
Check for leaks around throat.
If necessary, replace pump
packings. See Pump manual.
Replace battery with a
charged battery.
Battery has reached end of
life. Replace the battery.
Allow battery to cool down or
warm up to room temperature.
Replace pump and/or motor
assembly.
Allow motor to cool down to
room temperature.
Install battery correctly, ensure
battery is fully charged, or
replace battery.
Replace control board.
Replace power switch.
Replace control board.
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