MacDon M155 Unloading And Assembly Instructions page 128

7. Start the engine and drive the windrower at a speed MORE
THAN 8 km/h (5 mph):
a. Stand up from the operator's seat.
b. The CDM beeps once and displays NO OPERATOR on
the lower line.
c. If the CDM does not beep and display this message, the
operator presence system requires adjustment. Refer
to the windrower technical manual.
262320
PERFORMING OPERATIONAL CHECKS
112
Revision A