Graco GX21 Cordless Operation, Parts page 38

Troubleshooting
Problem
When paint is sprayed, coverage is
inadequate.
Fan pattern varies dramatically while
spraying.
Cannot trigger spray gun.
Paint is coming out of pressure control.
Paint is leaking through drain tube.
Paint leaks down outside of pump.
Motor is hot and runs intermittently.
Motor automatically shuts off due to
excessive heat. Damage can occur if
cause is not corrected.
Sprayer makes no sound when pres-
sure control is ON and ON/OFF switch
is ON (illuminated).
ON/OFF switch does not illuminate
when pressed.
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Cause
Material is going on too thin.
Pressure control switch is worn and
causing excessive pressure variation.
Spray gun trigger lock is engaged.
Pressure control is worn.
Sprayer is over pressurizing.
Pump packings are worn.
Vent holes in enclosure are plugged or
sprayer is covered.
Battery has insufficient charge.
Motor needs to be replaced.
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.
Solution
Move gun slower.
Choose spray tip with larger hole size.
Choose spray tip with narrower fan.
Make sure gun is close enough to
surface.
Take sprayer to Graco authorized
service center.
Rotate trigger lock to disengage trigger
lock. See page 9.
Take sprayer to Graco authorized
service center.
Take sprayer to Graco authorized
service center.
Replace pump packings with new
ProXChange module. See page 32.
Keep vent holes clear of obstructions
and overspray and keep sprayer open to
air.
Charge battery.
Take sprayer to Graco authorized
retailer, distributor, or service center.
Replace battery with charged battery.
Battery has reached end of life. Replace
battery.
Motor damaged, replace motor
assembly.
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.
3A8429A