MTU 12V4000M*3 series Operating Instructions Manual page 223

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 Control Unit power has
been disconnected with the
engine still running. This may lead
to overpressure in the HP system
which can damage the engine.
551 – SS Engine Overspeed Camshaft
Limit value 2
Cause
Camshaft overspeed.
555 – AL Call MTU Field Service
Cause
This fault becomes active if a
maintenance case has been
processed by the ECU Field Data
Handling (FDH) feature that
results in a change of engine
parameters.
This fault remains active even
after switching off and back on
until a valid enabling code is
entered via the SAM display and
key controls. This enabling code
can be requested via the Internet
using a special procedure.
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.
ZKP-Number: 22.510.933
Corrective action
1. Acknowledge alarm.
2. Attempt engine restart.
ZKP-Number: 20.555.001
Corrective action
u Request activation code via Internet.
MS15036/00E 2018-08 | Troubleshooting | 221