MTU 20V4000Lx2x Operating Instructions Manual page 117

517 – SD P-Charge Mix before Throttle
Red alarm.
Associated parameter 1.8004.631
Cause
Mixture pressure sensor before
throttle defective, short circuit or
wire break.
520 – SD P-Intake Air after Filter A
Yellow alarm.
Associated parameter 1.0186.900
Cause
Intake air pressure sensor after
filter on A side defective, short
circuit or wire break.
522 – SD P-Intake Air after Filter B
Yellow alarm.
Associated parameter 1.0187.900
Cause
Intake air pressure sensor after
filter on B side defective, short
circuit or wire break.
536 – AL Wiring PWM_CM1
Red alarm.
Associated parameter 1.1041.921
Cause
Cable break or short circuit on
channel PWM_CM1.
552 – AL GasControlCheck Fault
Red alarm.
Associated parameter 2.1090.118
Cause
Gas train test was not successful.
Alarm is activated if the gas train
does not report OK within a
specified time-out period. Either
the gas train leak test was not
successful, the time-out period is
set too short, or communication is
faulty.
Corrective action
u Check sensor and cabling (B79.23), replace as necessary. Fault is
rectified following engine restart.
Corrective action
u Check sensor and cabling (B81.1), replace as necessary. Fault is
rectified following engine restart.
Corrective action
u Check sensor and cabling (B81.2), replace as necessary. Fault is
rectified following engine restart.
Corrective action
u Check ignition cabling.
Corrective action
1. Check gas train.
2. Check cabling.
MS150122/00E 2015-07 | Troubleshooting | 117