as
won
as
sprayer swfich
IS
Building circuit bkake!
opens
turned
on.
CAUTION
Any
short in any part
of
tk
motor power circuit, which
mnnected
to the output sid
Ji
the
bridge,
will
muse
tb
]ridge to bum out immediatt
repair ail shorts before checl
y.
Correctly diagnose an
ng and replacing bridgf
Wilding circuit breaker opens
is
soon
as sprayer
is
plugged
nto
outlet
and sprayer
is
NO:
umed
on.
iprayer circuit breaker
opens
fter sprayer operates for
onl)
.to
10
minutes.
1.
Check
all
electrical wiring for damaged in-
sulation, and
ail
terminals for
loose
fit
or
damage. Be sure to check
wires
between
pressure control and motor which are
enca
ed
in conduit
(22).
See
page
30.
2.
Check for missing inspection plate gasket
(sea
page
251,
bent terminal forks
or
other
cause
a
short.
metal
to
meta.wntact
points which could
I
13.
Check motor armature for shorts by using
i
armature tester (growler) or perform spin
test.
See
page
17.
Inspect
windlngs for
burns.
~
4.
Check bridge
1308)
by substituting with
a
good bridge or
by
peiiorming bridge
test.
See
page
18.
CAUTION:
Do
not perform this chyk unti
armature is determine&to be good. A bad
armature will immediate@ burn out
a
good
bridge.
1.
Check 'Basic Electrical Problems'
on
Page
1
2.
Check ONlOFF switch
(302)
See
page
20.
'Be
sue
the sprayer
is
unpiuggedl Disconnet
wires from switch and check switch
with
ohm meter.
The
ohm meter should read in-
with
the
switch
ON.
finity with the ON/OFF switch
OFF,
and Zen
CAUTION:
A
short in the motor circuit
wi
bum
the
bridge out immediately, which in fur!
closed mode.
usuallycauses
the
ON/OFFswitch to faii.in th
1.
Check electrical supply with volt meter.
Meter should read
105
to
125
VAC.
2.
Check tightness of pump packing 'nut. Over-
tightening nut tightens packings on rod,
packings:
See
page
26.
restricts
pump action, and damages
3.
Check
stall
pressure. Remove
the
elbow
(€3)
and secondan/ ball valve
(301
from
the
tee
5ooD
psi
(350
bar) fluid-filled pressure gauge
(124)
at the pressure
control
outlet.
Install
a
turn
on
sprayer. Slowly increase prasslre
in the
tee
(124).
See
page
24.
Plug
in
and
28M)3wo
psi
US210
bar). Turn
off
and
setting
to
maximum. Pump should
stall
at
unplug sprayer.
1.
After determining that there
is
no
short in
system,
reset
circuit breaker bunon.
I
1.
Repair or replace any damaged wiring or ter-
minals. Securely reconnect
all
wires.
2.
Correct faulty conditions.
3.
Replace motor.
See
page
31.
4.
Replace bridge.
See
page
21.
2.
Replace ON/OFF switch.
See
page 20.
1.
if voltage is
too
high, do not operate spraye
until corrected.
2.
Loosen
packing nut. Check for leaking
around throat. Replace pump packings.
if
necessaty.
See
page
26.
Calibrate pressure control.
See
page
24.
1.
If
circuit breaker continues
to
open (bunon
pops up), replace the circuit breaker.
See
page
21.
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