Buhler 2425 - Manual (Page 148)

SECTION 2 - OPERATION
2-90
Electronic Monitor Rotary Select Switch
Failures
The Electronic Instrument Control System will
notify the operator that the rotary select switch
has an open circuit. The select switch will not
function in any of the calibration modes or normal
operation positions. Refer to “Electrical
Troubleshooting” in Section 4 for possible
causes of an open circuit. The following
description details the reaction of the electronic
monitor in the event of an open circuit on the
rotary select switch:
With the ignition in the “RUN” position and an
open circuit detected on the rotary select switch,
the lower portion of the monitor will flash “SEL”
and “OPEN.” No audible alarm will sound.
Pressing the acknowledge/reset button will not
clear the “SEL” “OPEN” display. The upper
portion of the monitor will continue to show
engine RPM. The “SEL” “OPEN” display will be
activated in any position of the rotary select
switch if an open circuit is detected.
Figure 2-121