MTU 12 V 4000 M23F Operating Instructions Manual page 150

480 – AL Ext. Engine Protection
External engine protection function active
Yellow alarm; warning
Cause
The external engine protection
function is active.
Monitoring of plant signal by
ECU active (plant side).
482 – SD T-Exhaust C
Cause
Exhaust temperature sensor on
A side faulty. Short circuit or
wire break
483 – SD T-Exhaust D
Cause
Exhaust temperature sensor on
A side faulty. Short circuit or
wire break
484 – HI T-Exhaust C
Limit value 1
Cause
Exhaust gas temperature (C-
side) too high.
485 – SS T-Exhaust C
Limit value 2
Cause
Exhaust gas temperature (C-
side) too high.
150 | Troubleshooting | MS150068/01E 2014-01
ZKP-Number: 2.0291.921
Corrective action
1. Check plant signal.
2. Contact Service.
ZKP-Number: 18.004.596
Corrective action
u Check sensor and wiring (B4.23), replace as necessary.
ZKP-Number: 18.004.597
Corrective action
u Check sensor and wiring (B4.24), replace as necessary.
ZKP-Number: 20.133.931
Corrective action
1. Reduce power.
2. Contact Service.
ZKP-Number: 20.133.932
Corrective action
1. Reduce power.
2. Contact Service.