MTU 20V4000Lx2x Operating Instructions Manual page 118

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.
118 | Troubleshooting | MS150122/00E 2015-07
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.