Greenlee Textron - Greenlee 855 Instruction Manual

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