Motor
Is
Hot
and Runs Intermittently
1
Type
of
Problem
What
to
Do
What to Check
If check is
OK,
go
to
the
next
check
1.
Check to see
if
sprayer has been operatin!
If
check
is
not
OK,
refer
to
this column
1.
Decrease pressure setting or increase tip
at
high
pressure with small tips. whic
size.
causeslowmotorRPMandresultsinexces-
sive heat build up.
sprayer is located is more than 32" C or if
sible.
sprayer is located in direct sun.
2.
Checktoseeifambienttemperaturewhere
2.
Movesprayertoshaded,coolerareaifpos-
3. Check to see
if
sprayer has been left in a
3.
Turn
off
spra er whenever ou stop spray-
stalled condition (sprayer turned on, pres-
surized, but not operatmg) for long periods
ing for a whi
Y
e and relieve iuid pressure.
of time.
Electrical
Short
Type
of
Problem
Building circuit breaker opens
turned
on.
as soon
as
sprayer switch is
CAUTION
Any short in any pari of the
motor power circuit, which is
connected to the output side
of the bridge, will cause the
ately. Correctly diagnose and
bridge
to
burn out immedi-
repair all shorts before check-
ing and replacing bridge.
Building circuit breaker opens
as soon
as
sprayer is plugged
into outlet and sprayer is NOT
turned
on.
What
to
Check
I
What
to
Do
If
check
is
OK,
go
to
the next check
1
If check
is
not
OK,
refer
to
this column
1.
Check all electrical wirin for damaged in- 1. Repair or replace any damaged wiring or
sulation, and all termin% for loose fit or
I
terminals. Securelv reconnect all wires.
damage. Be sure to checkwires between
pressure control and motor which are en-
cased in conduit (41).
See
page 30.
2. Check for missing inspection plate gasket 2. Correct faulty conditions.
metal to metal
contact points which
could
(see page 32),
bent terminal forks or other
cause
a
short.
test. See page 17. Inspect windings for
anarmaturetester(grow1er)orperformspin
burns.
3. Check motor armature for shorts by using
3. Replace motor. See page
30.
4.
Replace bridge. See page
21.
~~
eepage18or21.
CAUTION
Do
not perform this check until armature is
determined to be good.
A
bad armature will
immediately burn
out
a
good
bridge.
1.
Check 'Basic Electrical Problems'on page
11.
2.
CheckON/OFFswitch (302).See page20.
Be sure the sprayer is unplugged! Discon-
2
with ohm meter. The ohm meter should
nect wires
from
switch and check switch
and zero with the switch
ON.
read infinity with the ONIOFF switch OFF,
A short in the motor circuit will bum the bridge
CAUTION
out
immediately, which in turn usually causes
the ONIOFF switch to fail in the closed mode.
.Replace ONIOFF switch.
See page
20.
16
307-009
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