MTU 8 V 4000 Lx2 xx Operating Instructions Manual page 121

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.
Associated parameter 2.1200.934
Cause
Knock intensity exceeded
(extreme knocking detected).
649 – Al Req Angle Throttle A
Red alarm.
Associated parameter 2.1200.935
Cause
Opening angle of throttles A
exceeded.
650 – Al Req Angle Throttle B
Red alarm.
Associated parameter 2.1200.936
Cause
Opening angle of throttles B
exceeded.
651 – AL Preheating Error
Yellow alarm.
Associated parameter 1.1480.101
Cause
Engine preheating faulty.
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.
3. Check combustion chamber.
Corrective action
1. Check charge-air pressure reserve.
2. Intake air temperature outside TVU data.
3. Check compressor for contamination.
4. Reduce power.
Corrective action
1. Check charge-air pressure reserve.
2. Intake air temperature outside TVU data.
3. Check compressor for contamination.
4. Reduce power.
Corrective action
1. Low coolant.
2. Missing differential pressure in coolant system.
3. Coolant pump does not start, is faulty.
MS150114/01E 2015-03 | Troubleshooting | 121