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307-735
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 procedure when
you
shut of
f the sprayer
, when checking, adjusting
or
cleaning
the system, and when changing spray tips.
1.
Engage the gun safety latch.
2. T
urn the ON/OFF switch 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 fol
-
lowing
the steps above,
VER
Y SLOWL
Y loosen the tip
guard retaining nut or hose end coupling and 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
2
or damaged by
over–pressurization
3
Try
to thaw
, 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
1
has opened
Unplug power supply cord, relieve pressure, al-
low motor to cool, decrease pressure.
Pressure setting too low
Increase pressure.
Spray tip or filter plugged
Remove and clean.
W
rong type extension cord
Use
maximum 200 ft (61 m), 3 wires, 12 gauge,
grounded
extension cord.
Electric motor runs, but low paint
output
or no paint output;
or pump is not stroking
Piston ball check not seating
Service the pump. See page 16.
See the PROBLEM, “Not enough
paint
pressure”, on page 15, also
Piston packings worn or damaged
Replace the piston. See page 16.
Intake valve ball check not seating
Service the pump. See page 16.
.
Pump is frozen
Thaw
2
Filter element installed upside down
Install
element correctly
. See page 12 or manual
307–273.
Pressure control frozen
2
or damaged by
over–pressurization
3
Try
to thaw
, or replace pressure control.
Drive assembly damaged
Replace drive housing. See page 19.
Displacement pump worn or damaged
Replace displacement pump. See page 16.
Sprayer is not primed.
Prime sprayer
. See page 10.
Electric
motor labors when starting,
and
trips building circuit breaker or
fuse
Motor
capacitor has failed
Replace the capacitor
. See page 20.
Circuit board has failed
Replace the circuit board. See page 21.