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TROUBLESHOOTING GUIDE
WARNING
To reduce the risk of serious .bodilv
injury.
in-
Pressure
Relief
Procedure
6.
Engage the gun safety latch.
cluding fluid injection, splashing fluid in ihe eyes
7.
Ooen the drain valve. havina a container readv
~~
or on the skin, or injury from moving parts or elec
-
to
catch the drainage.
tric shock, always follow this procedure whenever
you shut
off
the sprayer, when checkingor servic-
8.
Leave the drain valve open until you are ready
ing
any part of the spray system, when Installing,
to spray again.
you stop spraying.
cleaning or changing spray tips, and whenever
pletely clogged, or thatpressure has not been fully
If
you suspect that the spray
tip
or hose
is
com-
1.
Engage the gun safety latch.
relieved after following the steps above, VERY
2.
Turn
the
ON/OFF switch to
OFF.
SLOWLY loosen the
tip
guard retaining nut or
hose end
couolina and relieve oressure araduallv.
I
3.
Unplug
the
power supply cord. then loosen comphely. Nowciearthe tip or hosb:
4.
Disengage the gun safety latch.
5.
Hold a metal part of the gun firmly to the side of
a grounded metal pail,
and3rigger the gun to
relieve pressure.
I~~~~
TYPE
OF
PROBLEM
MOTOR
WONT
OPERATE
Basic Fluid Pressure Problems
Basic Mechanical Problems
Basic Electrical Problems
WHAT TO CHECK
If
check is
OK,
go
to next check
1.
Check the pressure control knob sening.
The motor
will
not run if
it
is at the
minimum sening (fully
counterclockwise).
2.
Check for
a
clogged spray tip. Refer
to
your separate gun or tip instruction
manual.
-
-
-
-
i
1
it,
due
to
exposure
to low temperatures, by placing
it
in
a
'Thaw the sprayer if water or water
-
based paint has frozen in
warm area.
Do
not try to start the sprayer until
it
has thawed
completely. If the bourdon tube was not damaged by the
freezing, the pump should operate. If paint hardened (dried1 in
the sprayer. the pump packings and/or bare pressure control
mum be replaced.
See
page
23
or manual
307-793.
1.
Check for frozen or hardened paint
in
the pump (19) andlor pressure control
bourdon tube. Using
a
screwdriver,
carefully try to rotate fan
at
back of
motor.
See
page
15.
2.
Check displacement pump connecting
rod pin
(m).
It
must be completely
pushed into connecting rod
(91 and
spring retainer
(21)
should be firmly in
groove of connecting rod. See page
26.
3.
Check for motor damage. Remove drive
to
rotate fan bv hand.
housing assembly
(6).
See page
25.
Try
1.
Check electrical supply with volt meter.
Meter should read 190-250
Volts.
2.
Check extension cord for visible
damage. Use
a
volt meter or
test
lamp
m
extension cord outlet
to
check.
3. Check sprayer power supply cord
(311)
for visible damage such
as
broken in
-
sulation or wires.
4.
Check motor brush leads, terminals and
brush length. Brush length should be
14
mm minimum. See
DaQe
28.
WHAT.TO
DO
If
check is
NOT
OK
refer to this column
1. Slowly increase the pressure setting to
see
if
the motor starts.
2.
Relieve pressure, refer
to
your separate
gun or tip instruction manual for tip
cleaning.
1.
Thaw'.
Plug
in
sprayer
and
turn
on.
Slowly increase pressure setting
to
see
if
motor starts. If
it
doesn't, replace the
displacement pump packings
(see
manual
307
-
793)
andlor replace the bare
23.
pressure control box (3011'. See page
2.
Push pin into place and secure with the
spring retainer.
3.
Replace motor I1
1
if
fan won't turn.
1.
Reset building circuit breaker; replace
building fuse. Try another electrical
outlet.
2.
Replace extension cord.
3. Replace power supply cord.
See page 18.
4.
lighten terminal screws; replace
brushes. See page
27.
'When replacing the bare pressure control box (item
301).
trical hardware and reinstall these parts in the bare box.
remove the ONlOFF switch, bridge, circuit board and elec
-
Troubleshooting continued on next page.
307-671
9