Current Tools Omni 747 - TROUBLESHOOTING GUIDE; Bender Power and Operation Issues

34
TROUBLESHOOTING
ALWAY
S
disconnect power suppl
y
before removing an
y
guards or covers and
before servicing this bender. Failure to do so ma
y
result in serious in
j
ur
y
or death
.
W
ARNIN
G
Problem Cause Diagnosis Cure
1. Bender will not
operate
Power source Check for voltage at power
source
If power is on,
go to (#3)
2. No power at
bender
Bad power cord Ohm cord for
broken wire
Replace cord
3. Power to bender
but will not
operate
Circuit break /
power switch in
the off position
Check power on load side
of breaker to neutral with
volt meter
Turn circuit
breaker on. If on,
go to the next
step.
Fuse blown Ohm circuit for short Replace
Control Transformer
bad
Check voltage in and out,
if input but no output
Replace
Contactor bad Check contacts and ohm
coil for open circuit
Replace
Bridge rectifier bad Check with ohm meter Replace
Switch bad Check with ohm meter Replace
Motor bad Check brushes and ohm for
open or short armature
Replace
4. Motor runs but
will not bend
Chain from gear box
to jack shaft broken
Remove cover and visually
check for broken parts
Replace
Bad gear box Motor running but
no output through gear
box
Replace
Chain from jack shaft
to shoe sprocket
broken
Remove cover and visually
check for broken parts
Replace
Key between motor
and gear box missing
Remove motor from gear
box
Replace key
5. Bender operates
in one direction
only
Bad FWD / REV
switch
Ohm switch for open
contact or shorted contacts
Replace
Bad pendant cord Ohm for broken wire Replace
Bad contactor Check contact and ohm for
open circuit
Replace
6. Contactors chatter Low power to bender Check with amp meter Do not use
long drop cords