MTU 20V4000L32FNER Operating Instructions Manual page 152

628 – AL Wiring PWM_CM10
Red alarm.
Associated parameter 1.1041.930
Cause
Wire break or short circuit on
channel PWM_CM10.
642 – SD Electr. Motor Power AI2
Yellow alarm.
Associated parameter 2.8006.040
Cause
Engine power sensor defect
(analog input 2).
646 – Al Knock Intensity
Red alarm. Engine shutdown.
Associated parameter 2.1200.934
Cause
Knock intensity exceeded
(extreme knocking detected).
649 – Al Req Angle Throttle A
Yellow alarm. Power reduction.
Associated parameter 2.1200.935
Cause
Opening angle of restrictor flaps A
exceeded.
650 – Al Req Angle Throttle B
Yellow alarm. Power reduction.
Associated parameter 2.1200.936
Cause
Opening angle of restrictor flaps B
exceeded.
152 | Troubleshooting | MS150122/02E 2017-09
Corrective action
u Check setting at engine governor.
Corrective action
1. Generator eff. power not correctly transmitted.
2. Generator eff. power can also be transmitted via CAN bus as an
option.
3. Check configuration of plant control system.
Corrective action
1. Check gas quality if feasible (methane number).
2. Check emissions (→ Page 47).
3. Check combustion chamber.
Corrective action
1. Check charge-air pressure reserve.
2. Intake air temperature not as per TVU data.
3. Check exhaust system for leakage.
4. Check compressor for contamination.
5. Reduce power.
Corrective action
1. Check charge-air pressure reserve.
2. Intake air temperature not as per TVU data.
3. Check exhaust system for leakage.
4. Check compressor for contamination.
5. Reduce power.