Troubleshooting Guide - Graco 224–605 Owner's Manual

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.
Check everything in the chart before disassembling the sprayer.
PROBLEM
Electric motor won't run
Electric motor stops while spraying Power cord or extension cord unplugged,
Electric motor runs, but low paint
output or no paint output, output or no paint output,
pump is not stroking
See the PROBLEM "Not enough See the PROBLEM, "Not enough
paint pressure", on page 15, also
.
Electric motor labors when starting,
and trips building circuit breaker or and trips building circuit breaker or
fuse

TROUBLESHOOTING GUIDE

WARNING
CAUSE
Power cord or extension cord unplugged,
or damaged, or building circuit breaker or
fuse has tripped
1
Motor overload switch
Pressure setting too low
Pressure control frozen or damaged by
over–pressurization
or damaged, or building circuit or fuse is
blown
Motor overload switch* has opened
Pressure setting too low
Spray tip or plugged
Wrong type extension cord
Piston ball check not seating
and and
Piston packings worn or damaged
Intake valve ball check not seating
Pump is frozen
Pressure control frozen or damaged by
3
overpressurization
Drive assembly damaged
Displacement pump worn or damaged
Sprayer is not primed.
Circuit board has failed
Motor capacitor has failed
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, VER Y SLOWL Y loosen
the tip guard retaining nut of hose end coupling to
relieve pressure gradually. Now clear the tip or
hose.
SOLUTION
Check, reset or replace.
has opened Unplug power supply cord, relieve pressure, al-
low motor to cool, decrease pressure.
Increase pressure.
Try to thaw
Check, reset or replace.
Unplug the power supply cord, relieve pressure,
allow motor to cool, clear motor air passages of
dirt and overspray; decrease pressure.
Increase pressure.
Remove and clean.
Use maximum 200 foot (61 m), 3 wires, 12
gauge, grounded extension cord.
Service the pump. See page 16.
Replace the piston. See page 16.
Service the pump. See page 16.
2
Thaw
Try to thaw
Replace the drive housing. See page 22.
Replace the displacement pump. See page 16.
Prime the sprayer. See page 10.
Replace the circuit board. See page 18.
Replace the capacitor. See page 23.
2
, or replace pressure control.
2
, or replace pressure control.