"Baxter" wrote in message
ups.com...

Press Enter, Start and Power on buttons simultaneously. This brings up
the Service Menu on which there are a great many things - 14 items I
think.

Scroll down to No 11- Fill sensor. Press Enter, then toggle using up or
down arrow to change from With to W/O. Press Enter.

Great ... that is the way it is done on more modern equipment with
non-volatile
memory.

See if there is a diagnostics section in the service menu ... if Jobo did
the software correctly it should be possible to display the status of the
liquid fill sensor on the display, this lets you fiddle with it and find
what it is that is causing the signal to drop.