549 – AL Power Cut-Off detected
ZKP-Number: 27.001.952
This is an alarm from the emergency stop counter function.
Cause
Corrective action
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.
u
Instruct operators to switch off the power supply only after the
engine has come to a standstill.
550 – SS Engine Overspeed Red2
ZKP-Number: 20.480.095
Limit value 2
Cause
Corrective action
Redundant engine overspeed.
1. Acknowledge alarm.
2. Attempt to restart engine.
551 – SS Engine Overspeed Camshaft
ZKP-Number: 22.510.933
Limit value 2
Cause
Corrective action
Camshaft overspeed.
1. Acknowledge alarm.
2. Attempt to restart engine.
555 – AL Call MTU Field Service
ZKP-Number: 20.555.001
Cause
Corrective action
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.
u
Request enabling code via internet.
M015710/04E 2012-09 | Troubleshooting | 129
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