MTU 12 V 4000 M23F Operating Instructions Manual page 155

532 – AL Wiring PWM1
Red alarm
Cause
Wire break or short circuit on
channel PWM1.
533 – AL Wiring PWM2
Red alarm
Cause
Wire break or short circuit on
channel PWM2.
543 – AL Multiple FDH Slaves
Yellow alarm
Cause
There is more than one device
activated as backup medium for
FDH.
544 – AL Configuration Changed
Yellow alarm
Cause
This alarm is activated when the
system configuration was
changed, e.g. because the ECU
or SAM was exchanged.
549 – AL Power Disruption
Alarm from the emergency stop counter function
Yellow alarm; warning
Cause
Engine governor power has been
disconnected with the engine
still running. This may lead to
overpressure in the HP system
which can damage the engine.
ZKP-Number: 1.1046.900
Corrective action
u Check wiring to mixture throttle on A side, replace mixture
throttle on A side if necessary.
ZKP-Number: 1.1047.900
Corrective action
u Check wiring to mixture throttle on B side, replace mixture
throttle on B side if necessary.
ZKP-Number: 2.0555.005
Corrective action
u Contact Service (configuration fault).
ZKP-Number: 2.0555.003
Corrective action
u Contact Service (configuration fault).
ZKP-Number: 2.7001.952
Corrective action
u Instruct operators to switch off the power supply only after the
engine has come to a standstill.
MS150068/01E 2014-01 | Troubleshooting | 155