MTU 12 V 4000 M23F Operating Instructions Manual page 106

82 – HI P-Fuel (Common Rail)
Rail pressure > set value
Red alarm - DBR fuel limitation, start of injection retarded;
Cause
Suction restrictor of HP fuel
block jamming or HP fuel control
block wiring faulty.
83 – LO P-Fuel (Common Rail)
Rail pressure < set value
Red alarm - DBR fuel limitation
Cause
HP fuel control block defective
or leak in HP system.
085 – HI T-Recirculation
Recirculation temperature too high (limit value 1)
Cause
Charge-air temperature before
recirculation valve too high.
086 – SS T-Recirculation
Recirculation temperature too high (limit value 2)
Cause
Charge-air temperature before
recirculation valve too high.
89 – SS Engine Speed too Low
Engine speed too low
Red alarm; engine shutdown
Cause
Various causes possible.
106 | Troubleshooting | MS150068/01E 2014-01
ZKP-Number: 2.0104.931
Corrective action
1. Check wiring (→ Page 265).
2. Contact Service.
ZKP-Number: 2.0104.921
Corrective action
u Contact Service.
ZKP-Number: 2.0128.931
Corrective action
u Reduce power.
ZKP-Number: 2.0128.932
Corrective action
u Reduce power.
ZKP-Number: 2.2500.030
Corrective action
1. Acknowledge alarm.
2. Check for additional messages.
3. Contact Service.