SYMPTOM / CONDITION
POSSIBLE CAUSE
CORRECTIVE ACTION
BA models - Motor runs but digital
board does not light up. All controls are
inoperative.
Fuse is blown on control board.
Remove control board and check the fuse.
See page 41.
BA models - The top cylinder continues
forward by itself without activating any
controls. The keypad or foot switch have
no effect.
Solenoid valve spool is stuck.
Manually operate the solenoid valve
using the manual control buttons. This
should dislodge any debris that may have
become stuck in the valve body.
The AUTO key on the control board is
stuck, shorted, malfunctioning.
Visually check the control board for any
possible wear or cuts. Remove the front
display panel by disconnecting it from the
wire ribbon or install the jumper board as
described on page 41. This will confirm if
the problem is related to the front display
panel or not. If the top cylinder operates
normally with the front display panel
removed or the jumper board in place,
then return the complete digital control
board assembly to the factory for repair.
BA models - The top cylinder continues
forward by itself without activating any
controls. The top cylinder stops when the
left foot switch is depressed but will
continue when released.
The right foot switch or JOG/ FWD
button is stuck, shorted, malfunctioning.
Visually check the control board for any
possible wear or cuts. Remove the front
display panel by disconnecting it from the
wire ribbon or install the jumper board as
described on page 41. This will confirm if
the problem is related to the front display
panel or not. If the problem persists,
check wire connections on the right foot
switch. Refer to diagram on page 49.
Check micro switch with ohmmeter as
described on page 43. Check for broken
or disconnected wires. Replace if faulty.
BA models - The top cylinder retracts by
itself without activating any controls. The
top cylinder will advance when the AUTO
button is depressed, but immediately
retract when released. The STOP /
REVERSE button is inoperative. The top
cylinder will stop retracting when the JOG
/ FWD button or right foot switch is
depressed, but will continue reversing
when released.
The left foot switch is stuck, shorted,
malfunctioning.
Check wire connections on the left foot
switch.
Refer to diagram on page 49. Check
micro switch with ohmmeter as described
on page 43. Check for broken or
disconnected wires. Replace if faulty.
BA models - The STATION window never
advances even after the top cylinder has
fully retracted.
The trip arm is not properly
tripping the zero angle micro
switch.
Adjust the trip arm as described on page
40.
BA models - The top cylinder doesn't stop
at the degree setting that was
programmed into the SET ANGLE
window.
The encoder is malfunctioning, probably
due to contamination or moisture.
In most case the encoder will have to be
replaced. You may temporarily correct
the problem by cleaning the encoder as
described on page 40.
The solenoid valve spool is stuck.
Manually operate the solenoid valve
using the manual control buttons. This
should dislodge any debris that may have
become stuck in the valve body.
Bender Operation Manual 47
HELPFUL DIAGNOSTIC TIPS FOR DIGITAL MODELS
If you feel a control problem exists with the main circuit panel, the jumper board can be used to temporarily bypass the
complete control board assembly until repairs are made. (See page 41)
If the top cylinder advances or retracts by itself without activating any controls and you feel the problem exists with the
front display panel due to cuts or other damage, disconnect it from the main circuit panel by unplugging it from the blue
wire ribbon. With the front display panel taken out of the circuit, the foot switch controls should operate normally.
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