MTU 20V4000Lx2x Operating Instructions Manual page 128

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678 – AL TecJet Red
Red alarm.
Associated parameter 1.4540.991
Cause
An internal combined alarm in the
gas control valve was detected.
679 – AL ProActA Red
Red alarm.
Associated parameter 1.4550.091
Cause
An internal combined alarm in
throttle A was detected.
680 – AL ProActB Red
Red alarm.
Associated parameter 1.4550.191
Cause
An internal combined alarm in
throttle B was detected.
681 – AL NOxA Red
Red alarm.
Associated parameter 1.4560.091
Cause
An internal combined alarm at
NOx sensor A was detected.
682 – AL NOxB Red
Red alarm.
Associated parameter 1.4560.191
Cause
An internal combined alarm at
NOx sensor B was detected.
685 – AL Lube Oil Min
Red alarm.
Associated parameter 1.1480.307
Cause
Minimum engine oil filling level
detected.
128 | Troubleshooting | MS150122/00E 2015-07
Corrective action
u An exact fault designation is transmitted via CAN bus to the genset
control system.
Corrective action
u An exact fault designation is transmitted via CAN bus to the genset
control system.
Corrective action
u An exact fault designation is transmitted via CAN bus to the genset
control system.
Corrective action
u An exact fault designation is transmitted via CAN bus to the genset
control system.
Corrective action
u An exact fault designation is transmitted via CAN bus to the genset
control system.
Corrective action
1. Check engine oil level (→ Page 155).
2. Check replenishment system.
3. Fill oil.

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