MTU 12 V 4000 M23F Operating Instructions Manual page 151

486 – HI T-Exhaust D
Limit value 1
Cause
Exhaust gas temperature (D-
side) too high.
487 – SS T-Exhaust D
Limit value 2
Cause
Exhaust gas temperature (D-
side) too high.
488 – HI ETC3 Overspeed
Speed of 2nd secondary turbocharger too high (limit value 1)
Yellow alarm; warning
Cause
Clogged charge-air circuit or
fault in turbocharger.
489 – SS ETC3 Overspeed
Speed of 2nd secondary turbocharger too high (limit value 2)
Red alarm; engine shutdown
Cause
Clogged charge-air circuit or
fault in turbocharger.
490 – HI ETC4 Overspeed
Speed of the 3rd secondary turbocharger too high (limit value 1)
Yellow alarm; warning
Cause
Clogged charge-air circuit or
fault in turbocharger.
ZKP-Number: 20.134.931
Corrective action
1. Reduce power.
2. Contact Service.
ZKP-Number: 20.134.932
Corrective action
1. Reduce power.
2. Contact Service.
ZKP-Number: 2.3014.931
Corrective action
u Reduce power.
ZKP-Number: 2.3014.932
Corrective action
u Reduce power.
ZKP-Number: 2.3015.931
Corrective action
u Reduce power.
MS150068/01E 2014-01 | Troubleshooting | 151