Greenlee 855 - Wont Bend - Display On; Bender Runs Backwards

Greenlee Textron / Subsidiary of Textron Inc.
60
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
855 Smart Bender™
YES
YES
Troubleshooting (cont’d)
YES
Does bender work with
different (good) pendant?
Jump #2 & #4 termi-
nals in pendant.
Does bender run?
Bad pendant
board.
Bad membrane
switch.
YES
NO
YES
NO
NO
YES
NO
Replace I/O
board.
NO
YES
YES
NO
Does BEND work when set to
1-1/2" or 2" size?
Does PWM LED light when BEND
or UNLOAD is pressed?
Can an angle be programmed?
Is 100+ VDC measured at the
motor leads when BEND or
UNLOAD is pressed?
Are all pin connections making con-
tact on 6-wire cable connecting
the I/O board to the PGU board?
See Won’t Unload
– Display On
section
Replace I/O
board.
Replace motor.
Replace or repair
the interconnecting
cable.
YES
NO
WON’T BEND – DISPLAY ON
NO
YES
NO
YES
NO
YES
YES
NO
BENDER RUNS BACKWARDS FOR BEND & UNLOAD
Rotary switch cable
is backwards or
rotary switch unit
is bad.
Select proper size.
Is proper size of conduit selected?
Does bender run backwards when
using deluxe pendant or does bender
run backward when a conduit size for
the shoe not being used is selected?
Are polarity of rectifier, relay and
motor connections correct (see
electrical control system layout
diagram)?
On 1-1/2" or 2" setting, does white
motor lead receive positive voltage?
Replace PGU.
NO
Replace I/O board.
Disconnect I/O-PGU cable on
the I/O board and reconnect to
test terminal. Disconnect brake
wire unit. Restore power and
push test switch. Does shoe
move? (The toggle switch,
located next to the push button
switch controls the direction the
shoe moves.)
Replace PGU.
NO
Replace I/O board.
Disconnect I/O-PGU cable on
the I/O board and reconnect to
test terminal. Disconnect brake
wire unit. Restore power and
push test switch. Does shoe
move? (The toggle switch,
located next to the push button
switch controls the direction the
shoe moves.)
Connect wires
correctly.
Motor is wired
wrong internally.