MTU 8 V 4000 Lx2 xx Operating Instructions Manual page 116

554 – AL Ignition Fault
Red alarm.
Associated parameter 2.1090.122
Cause
Ignition failure. Alarm is
activated if the feedback signal
from ignition system is not
received within a specified time-
out period. Either the ignition
could not be activated, the
timeout period is set too short,
or communication is faulty.
556 – AL GasValve Fault
Red alarm.
Associated parameter 2.1090.124
Cause
Gas supply solenoid valve faulty.
Alarm is active if there are
problems with the gas supply
solenoid valves. Either the gas
supply solenoid valves are
faulty, the timeout period is set
too short, or communication is
faulty.
557 – AL speed drop fault
Red alarm. Engine shutdown.
Associated parameter 2.1090.126
Cause
Speed drop. Alarm is activated if
engine speed drops during
starting sequence.
559 – AL mixture throttle A fault
Red alarm. Engine shutdown.
Associated parameter 1.1450.010
Cause
A problem related to mixture
throttle on A side occurred.
Possible causes: Mixture throttle
defective, no power supply to
throttle, cabling of feedback
and/or position signal faulty.
116 | Troubleshooting | MS150114/01E 2015-03
Corrective action
1. Check ignition system.
2. Check cabling.
Corrective action
1. Check gas train.
2. Check cabling.
Corrective action
u Check gas train.
Corrective action
u Check mixture throttle on A side and cabling. Replace mixture
throttle on A side as necessary.