MTU 12 V 4000 L62FB Operating Instructions Manual page 119

623 – HI NOx Value
Yellow alarm.
Associated parameter 2.3050.026
Cause
NOx emissions have exceeded the
first limit value
624 – HIHI NOx Value
Yellow alarm.
Associated parameter 2.3050.027
Cause
NOx emissions have exceeded the
second limit value
633 – SD P-Ambient Air (HDT2800)
none
Associated parameter 1.0700.087
Cause
Air moisture sensor defect
634 – SD T0-Ambient Air (HDT2800)
none
Associated parameter 1.0700.089
Cause
Air moisture sensor defect
635 – SD Air humidity (HDT2800)
none
Associated parameter 1.0700.091
Cause
Air moisture sensor defect
642 – SD Electr. Motor Power AI2
Yellow alarm.
Associated parameter 2.8006.040
Cause
Motor power sensor defect
(analog input 2)
Corrective action
1. Check gas quality if feasible.
2. Check NOx sensor.
3. Check emissions.
Corrective action
1. Check gas quality if feasible.
2. Check NOx sensor.
3. Check emissions.
Corrective action
u Sensor currently not in standard scope of delivery.
Corrective action
u Sensor currently not in standard scope of delivery.
Corrective action
u Sensor currently not in standard scope of delivery.
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.
MS150098/02E 2016-11 | Troubleshooting | 119