Greenlee Textron - Greenlee 855 Instruction Manual

Troubleshooting (cont'd)
The following flow charts will show some of the most likely areas
to look at for certain problems. They by no means encompass all
the possible problems or the only possible solutions.
WON'T BEND – DISPLAY BLANK
Was pendant plugged in
YES
after the bender was
turned on?
NO
YES
Does bender work with
different (good) pendant?
NO
Bent pin connector in
YES
receptacle or bad recep-
tacle unit?
NO
Is fuse blown?
NO
Is 115 VAC measured at
PGU board input?
YES
Do any of the 8 LEDs on
the I/O board light?
YES
Are metal oxide varistors YES
(MOVs) on PGU Board
damaged or discolored?
NO
Does PWM LED light
YES
when BEND is pressed?
NO
Disconnect I/O-PGU
cable on the I/O board
and reconnect to test
terminal. Disconnect
brake wire unit. Restore
YES
power and push test
switch. Does shoe move?
(The toggle switch, lo-
cated next to the push
button switch, controls
the direction the shoe
moves.)
NO
Replace PGU.
Greenlee Textron / Subsidiary of Textron Inc.
855 Smart Bender™
Turn switch off and then
back on.
Bad pendant board, bad
pendant cord or plug inside
pendant is unplugged.
Replace receptacle.
YES
Replace fuse.
Plugged into dead circuit,
NO
bad power cord, or
switch is bad or off.
NO
Replace transformer unit.
Replace PGU.
Replace PGU.
Replace I/O board.
WILL BEND – WON'T COUNT
Is bending shoe on in the proper
orientation?
YES
When jog is pressed, does the
bender continue to run slowly
without stopping after 1/2 degree?
NO
Is 5 VDC measured across the center
and right legs of the voltage regulator
on the I/O board labeled VR2?
YES
Do Home 1 and Home 2 LEDs
light when the shoe is run past
the Start position?
YES
Does bender count with different
(good) pendant?
NO
Do both Quad 1 and Quad 2
LEDs light when bend or unload
is pressed?
YES
Replace I/O board.
WILL BEND – DISPLAY BLANK
Is at least 80 volts measured at
the power cord?
YES
Is 12 VDC measured across
center and right legs of VR1 on
I/O board or does display light up
when brake is unplugged?
YES
Replace pendant board.
59 4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Install shoe per
NO
instructions in this
manual.
YES
Replace optical
encoder.
NO
Replace I/O
board.
Replace or adjust
NO
limit switches or
wire unit.
YES Replace pendant
board.
NO
Replace optical
encoder.
NO
Find 120 VAC
power source.
Replace I/O
NO
board.