Greenlee Textron / Subsidiary of Textron Inc.
61
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
855 Smart Bender™
Troubleshooting (cont’d)
WON’T UNLOAD – DISPLAY ON
YES
NO
NO
YES
NO
See
Won’t Bend - Display
On
Section.
Loosen cam mounting
bolt and retighten while
holding the outside
washer so that the cam
is oriented to 7 o'clock.
Is the retention cam
engaged with the roller
support?
Does the bender unload
when the “LOCKOUT”
plug is removed from the
I/O board?
Is the retention cam
pointed to around the
7 o’clock position so that
the ramp of the cam is
not engaging the limit
switch arm?
YES
Lower the roller support
assembly.
Remount the limit switch
farther to the right, or
bend the switch arm so
that the dwell portion of
the cam won’t actuate it.
YES
YES
NO
YES
NO
Are the proper support rollers
and shoe groove being used for
the type and size of conduit
being bent?
Is the current on the 115 VAC
line exceeding 20 amps?
Is the DC current to the motor
exceeding 17 amps?
When BEND is pressed, is the
voltage sent to the motor 20 to 50
volts over the AC line voltage?
Are connectors corroded?
Replace PGU.
Follow directions in
instruction manual.
Replace circuit
breaker.
Replace motor.
Replace bridge
rectifier.
Clean.
NO
NO
YES
NO
YES
YES
Use 120 VAC.
NO
YES
NO
Replace pendant
membrane switch.
Does bender stop when the pen-
dant is unplugged?
Is the supply line voltage low?
Replace PGU.
NO
YES
NO
On 1-1/2" or 2" size setting, is
the DIR LED on the I/O Board on
when BEND is pressed?
Replace I/O board.
Replace PGU.
YES
Replace 918 6645.6 relay.
When DIR LED is on, is 12 VDC
measured at large relay coil
(where relay wire unit connects)?
TRIPS CIRCUIT BREAKER
WON’T STOP
BENDER ONLY RUNS IN ONE DIRECTION
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