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TYPE
OF
PROBLEM
ELECTRICAL SHORT
Buildino circuit breaker ooens
as
sooi
as sprayer switch
is
turned on.
CAUTION
Any short in any part of
thf
motor power circuit, which
i$
connected to the output sidc
of the bridge, will cause
thf
bridge to burn out immediate
ly. Correctly diagnose anc
ing and
replacing
bridge
repair all shorts before
check,
as soon as sprayer is plugged
Building circuit breaker opens
turned on.
into outlet and sprayer is
NO1
WHAT TO CHECK
If
check
Is
NOT
OK
refer to this
col
-
If
check
is
OK,
go
to
next check
WHAT TO DO
umn
Check all electrical wiring for damaged
or damage. Be sure to check wires
bet-
insulation, and all terminals for loose
fit
ween pressure control and motor which
are encased in conduit
141
I.
See page
29.
1.
Repair or replace any damaged wiring or
terminals. Securelv reconnect all wires.
,
Check for missing inspection plate
2.
Correct faulty conditions.
gasket
(see page
27).
bent terminal forks
which could cause a short.
or other metal to metal contact points
Check motor armature for shorts by us
-
3.
Replace motor. See page
29.
ing an armature tester (growler) or per
-
form spin test. See page
15.
Inspect
windings for bums.
,
Check bridge
(3081
by substituting with
4.
Replace bridge. See page
20.
a good bridge
or
by performing bridge
test.
See page
16.
CAUTION:
Do
not perform this check
until armature is determined to be
good.
A bad armature will immediately burn
out a good bridge.
Check 'Basic Electrical Problems' on
page
9.
Check ON/OFF switch
1302)
See page
19.
Be
sure
the
sprayer
is
unplugged!
switch with ohm meter. The ohm meter
Disconnect wires from switch and check
should read
infinity
with the ONlOFF
switch OFF, and zero with the switch
ON.
CAUTION:
A short
in
the motor circuit
will burn the bridge out immediately,
which in turn usually causes the ONlOFF
switch
to
fail in the closed mode.
2.
Replace ON/OFF switch. See page
19.
14
307
-
671