MTU 12 V 4000 M23F Operating Instructions Manual page 104

60 – SS T-Coolant L4
Coolant temperature too high / low (limit value 4)
Red alarm; engine shutdown
Cause
Coolant circuit not functioning
correctly (e.g. damage, leaks,
low coolant level).
63 – HI P-Crankcase
Crankcase pressure too high (limit value 1)
Yellow alarm; warning
Cause
Crankcase exhaust system
clogged or leaking.
64 – SS P-Crankcase
Crankcase pressure too high (limit value 2)
Red alarm; engine shutdown
Cause
Crankcase exhaust system
clogged or leaking.
65 – LO P-Fuel
Fuel supply pressure too low (limit value 1)
Yellow alarm; warning
Cause
Leaking or clogged fuel lines or
fuel filter.
104 | Troubleshooting | MS150068/01E 2014-01
ZKP-Number: 2.0120.934
Corrective action
1. Activate fan emergency operating mode if required.
2. Allow engine to cool down.
3. Check coolant cooler, clean if dirty.
4. Acknowledge alarm.
5. Restart engine (→ Page 77).
6. Contact Service.
ZKP-Number: 2.0106.931
Corrective action
1. Reduce power.
2. Replace oil mist fine separator element.
3. Contact Service.
ZKP-Number: 2.0106.932
Corrective action
1. Reduce power.
2. Replace oil mist fine separator element.
3. Contact Service.
ZKP-Number: 2.0102.921
Corrective action
1. Check fuel lines for leakage.
2. Check filter, fuel low-pressure side.
3. Replace fuel filter (→ Page 187).