MTU 12 V 4000 M23F Operating Instructions Manual page 159

606 – AL Double Nodes Lost CAN 1+2
ECU does not detect a monitored CAN bus.
Red alarm; forced idle
Cause
A node on both CANs has failed.
Short circuit or wire break.
614 – AL L1 P-Fuel Supp. Filt. Diff.
Fuel prefilter differential pressure too high
Yellow alarm; warning
Cause
Fuel prefilter not functioning
correctly.
625 – SD P-Fuel b. Supp. Filter
Signal error, fuel pressure sensor before supplementary filter
Yellow alarm; warning
Cause
Analog input signal for fuel
pressure before supplementary
filter faulty.
Short circuit or wire break.
641 – AL System Restart by Watchdog
System is restarted by watchdog
Cause
System restart by watchdog
detected.
687 – SD Oil Level Switch
Level switch faulty
Cause
Lube oil level switch is faulty.
==> Short circuit or wire break.
ZKP-Number: 2.0500.691
Corrective action
1. Check wiring and power supply of plant (→ Page 265).
2. Acknowledge alarm.
3. Restart engine (→ Page 77).
4. Contact Service.
ZKP-Number: 2.0119.001
Corrective action
1. Replace fuel prefilter.
2. Contact Service.
ZKP-Number: 1.8004.600
Corrective action
1. Check pressure transmitter and wiring, replace as necessary
(→ Page 265).
2. Fault is rectified when engine is restarted (→ Page 77).
3. Contact Service.
ZKP-Number: 1.8012.902
Corrective action
u -
ZKP-Number: 1.0150.920
Corrective action
1. Check sensor and wiring (B24), replace as necessary. Alarm is
reset when fault is eliminated (→ Page 265).
2. Contact Service.
MS150068/01E 2014-01 | Troubleshooting | 159