No.: Fault text Possible cause Measure
90 Error Bus
monitoring
Bus master does not return
the toggle bit within the
monitoring interval.
■ Check bus master software.
■ Check the time-out time, see chapter
8.
■ Deactivate monitoring if it has been
activated inadvertently. See chap‐
ter 8.
Tab. 108 Fault displays in the Communication – Com-Module menu.
Result The bus communication is automatically continued as soon as the cause of the fault is remedied.
10 Fault Recognition and Rectification
10.7 Communication modules
168
Service Manual Controller
SIGMA CONTROL 2 BLOWER ≥ 2.5.3 No.: 901700 10 E