Bernina 790 PRO - Page 190

Errors and Faults
190
Fault Cause Solution
Bobbin Thread Indicator
doesn't React
Settings in the Setup Program. > Activate it in the Setup Program.
The bobbin thread indicator is
defect.
> Contact your authorized BERNINA dealer.
Error during Firmware Update
USB stick is not recognized. > Use the BERNINA USB stick.
The update process is blocked
and the hourglass on the display
is inactive.
> Remove the USB stick.
> Switch off the machine.
> Switch the machine on.
> Follow the instruction on the display.
Firmware update files are not
found.
> Unzip the update data.
> Store data for the firmware update directly on the data
medium and not in a folder on the USB stick.
BSR Presser Foot #42 not
detected
Lens is dirty. > Clean the lens with a soft, slightly damp cloth.
BSR cable not inserted correctly. > Insert the BSR connector vertically until it can be felt to
click into place.
Beads and/or Bartacks are
repeatedly not sewn properly
The Buttonhole Foot with
Slide#3A is not calibrated with
the machine.
> Calibrate Buttonhole Foot with Slide#3A. (61)
The Automatic Needle
Threader does not work
reliably
The automatic needle threader is
dirty.
> Clean the needle threader. (181)
The Automatic Needle
Threader does not thread the
needle
The needle selected in the needle
selection cannot be threaded,
e.g. twin needle.
> Single needle: Select the needle in the needle selection
to match the fitted needle.
> Double and triple needles: Thread the needles by hand.
The laser dot is not visible or
is at the wrong position
The laser is concealed or
deflected by the presser foot or
the needle.
> Raise the needle.
> Fit another presser foot.
> lower the presser foot before the sewing start, e.g. with
the knee lifter.
> Contact your authorized BERNINA dealer.