MTU M015710/04E Operating Instructions Manual page 114

549 – AL Power Cut-Off detected
This is an alarm from the emergency stop counter function.
Cause
ECU operating voltage was
switched off while the engine
was running. This may lead to
overpressure in the HP system
which can damage the engine.
550 – SS Engine Overspeed Red2
Limit value 2
Cause
Redundant engine overspeed.
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: 27.001.952
Corrective action
u Instruct operators to switch off the power supply only after the
engine has come to a standstill.
ZKP-Number: 20.480.095
Corrective action
1. Acknowledge alarm.
2. Attempt to restart engine.
ZKP-Number: 22.510.933
Corrective action
1. Acknowledge alarm.
2. Attempt to restart engine.
ZKP-Number: 20.555.001
Corrective action
u Request enabling code via internet.
M015710/04E 2012-09 | Troubleshooting | 129