622 – LOLO NOx Value
Yellow alarm.
Associated parameter 2.3050.025
Cause
Corrective action
NOx emissions have undershot
the second limit value.
1. Check gas quality if feasible.
2. Check gas pressure.
3. Check NOx sensor (→ Page 203).
4. Check emissions (→ Page 47).
623 – HI NOx Value
Yellow alarm.
Associated parameter 2.3050.026
Cause
Corrective action
NOx emissions have exceeded the
first limit value.
1. Check gas quality if feasible.
2. Check NOx sensor (→ Page 203).
3. Check emissions (→ Page 47).
624 – HIHI NOx Value
Yellow alarm.
Associated parameter 2.3050.027
Cause
Corrective action
NOx emissions have exceeded the
second limit value.
1. Check gas quality if feasible.
2. Check NOx sensor (→ Page 203).
3. Check emissions (→ Page 47).
626 – AL Wiring PWM_CM8
Red alarm.
Associated parameter 1.1041.928
Cause
Corrective action
Wire break or short circuit on
channel PWM_CM8.
u
Check cabling to NOx sensor on B side (→ Page 202).
627 – AL Wiring PWM_CM9
Red alarm.
Associated parameter 1.1041.929
Cause
Corrective action
Wire break or short circuit on
channel PWM_CM9.
u
Check setting at engine governor.
MS150104/03E 2017-09
| Troubleshooting | 151
TIM-ID: 0000038612 - 003
