Graco 224-605, Owner'S Manual

Page: 14 / 32

14
TROUBLESHOOTING GUIDE
WARNING
Pressure Relief Procedure
To reduce the risk of serious bodily injury, including
fluid injection, splashing in the eyes or on the skin,
or injury from moving parts, always follow this pro-
cedure when you shut off the sprayer, when check-
ing, adjusting or cleaning the system, and when
changing spray tips.
1. Engage the gun safety latch.
2. Turn the engine stop lever to OFF.
3. Unplug the power supply cord.
4. Disengage the gun safety latch. Hold a metal part
of the gun firmly to the side of a grounded metal
pail, and trigger the gun.
5. Engage the gun safety latch.
6. Open the fluid pressure drain valve and leave it
open until you start the sprayer again.
If you suspect the hose or spray tip is completely
clogged or that pressure is not fully relieved after
following the steps above,
VERY SLOWLY loosen
the tip guard retaining nut of hose end coupling to
relieve pressure gradually. Now clear the tip or
hose.
Check everything in the chart before disassembling the sprayer.
PROBLEM CAUSE SOLUTION
Electric motor won’t run Power cord or extension cord unplugged,
or damaged, or building circuit breaker or
fuse has tripped Check, reset or replace.
Motor overload switch
1
has opened Unplug power supply cord, relieve pressure, al-
low motor to cool, decrease pressure.
Pressure setting too low Increase pressure.
Pressure control frozen or damaged by
over–pressurization Try to thaw
2
, or replace pressure control.
Electric motor stops while spraying Power cord or extension cord unplugged,
or damaged, or building circuit or fuse is
blown Check, reset or replace.
Motor overload switch* has opened Unplug the power supply cord, relieve pressure,
allow motor to cool, clear motor air passages of
dirt and overspray; decrease pressure.
Pressure setting too low Increase pressure.
Spray tip or plugged Remove and clean.
Wrong type extension cord Use maximum 200 foot (61 m), 3 wires, 12
gauge, grounded extension cord.
Electric motor runs, but low paint
output or no paint output, and
Piston ball check not seating Service the pump. See page 16.
output or no paint output, and
pump is not stroking
See the PROBLEM “Not enough
Piston packings worn or damaged Replace the piston. See page 16.
See the PROBLEM, “Not enough
paint pressure”, on page 15, also
Intake valve ball check not seating Service the pump. See page 16.
. Pump is frozen Thaw
2
Pressure control frozen or damaged by
overpressurization
3
Try to thaw
2
, or replace pressure control.
Drive assembly damaged Replace the drive housing. See page 22.
Displacement pump worn or damaged Replace the displacement pump. See page 16.
Sprayer is not primed. Prime the sprayer. See page 10.
Electric motor labors when starting,
and trips building circuit breaker or Circuit board has failed Replace the circuit board. See page 18.
and trips building circuit breaker or
fuse
Motor capacitor has failed Replace the capacitor. See page 23.