Graco EM 5000 - Troubleshooting

307-913
14
Troubleshooting
WARNING
T o reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 6.
Check everything in the chart before disassembling the sprayer .
PROBLEM CAUSE SOLUTION
Motor won’t run, or the
motor stops while spraying
Power cord or extension cord unplugged,
or damaged, or building circuit breaker or
fuse has tripped
Check, reset or replace.
Motor overload switch opened Unplug power supply cord, relieve pressure, al-
low motor to cool. See NOTE A, page 15.
Over–pressure switch opened Reset. Correct cause of over–pressure. See
page
9, Step 5., and NOTE C, page 15.
Pressure setting too low Increase.
Pressure control frozen or damaged by
over–pressurization.
Try to thaw, or replace pressure control. See
NOTE
B and C, page 15.
Spray tip or filter plugged Remove and clean.
W rong type extension cord Use maximum 30 m, 3 wires, 1.5 mm gauge mini -
mum,
grounded extension cord.
Motor labors when starting, and
trips
building circuit breaker or fuse
Circuit board has failed Replace the circuit board inside
electrical junction box. See page 27.
Motor capacitor has failed Replace the capacitor . See page 28.
Motor runs, but displacement
pump
doesn’t operate
Pressure setting too low Increase pressure.
Displacement pump outlet filter dirty Clean filter .
T ip or tip filter clogged Clean tip or tip filter .
Paint dried on the displacement rod Service pump. See page 32.
Connecting rod worn or damaged Replace. See page 19.
Drive housing worn or damaged Replace. See page 21.
Clutch worn or damaged Service. See page 25.
Pinion assembly worn or damaged Service. See page 22.
Motor runs, but there is little or no
paint
output and pump does stroke
Sprayer is not primed. Prime sprayer . See page 8.
Spray tip too big or worn Change the spray tip.
Piston ball check not seating Service. See page 32.
Piston packings worn or damaged Replace. See page 32.
Intake valve ball check not seating Service. See page 32.
Displacement pump worn or damaged Replace. See page 32.
Clutch worn or damaged Service. See page 25.
Drive assembly damaged Replace. See page 21.