Troubleshooting Guide

Troubleshooting
3A3208B 35
When paint is sprayed, it runs down
the wall or sags.
Material is going on too thick. Move gun faster.
Choose a spray tip with smaller hole
size.
Choose spray tip with wider fan.
Make sure gun is far enough from
surface.
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/M
AGNUM
authorized service center.
Cannot trigger spray gun. Spray gun trigger lock is engaged. Rotate trigger lock to disengage
trigger lock. See page 12.
Paint is coming out of pressure
control switch.
Pressure control switch is worn. Take sprayer to Graco/M
AGNUM
authorized service center.
Paint is leaking through drain tube. Sprayer is over pressurizing. Take sprayer to Graco/M
AGNUM
authorized service center.
Paint leaks down outside of pump. Pump packings are worn. Replace pump packings
ProX only: Replace pump packings
with new ProXChange module. See
page 29.
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.
Extension cord is too long or not a
heavy enough gauge.
Replace extension cord. See page 4.
Unregulated electrical generator
being used has excessive voltage.
Use electrical generator with a proper
voltage regulator.
Motor needs to be replaced. Take sprayer to Graco/Magnum
authorized retailer, distributor, or
service center.
Problem Cause Solution