MTU 20 V 4000 G23 Operating Instructions Manual page 100

524 – SS Engine Overspeed Mid Val
Limit value 2
Cause
Average engine overspeed value
from three sources is too high.
525 – SD P-Lube Oil (R2)
Cause
Redundant lube oil pressure
sensor faulty; short circuit or wire
break.
526 – SD T-Coolant (R2)
Cause
Redundant coolant temperature
sensor faulty; short circuit or wire
break.
527 – D EngineSpd. Sensor Deviation
Cause
Maximum deviation of speed
sensors
528 – SD Engine Speed 3rd Sensor
Cause
Redundant crankshaft speed
sensor faulty; short circuit or wire
break.
529 – SS T-Coolant Red2
Limit value 2
Cause
Second redundant coolant
temperature too high.
100 | Troubleshooting | MS150093/01E 2012-06
ZKP-Number: 20.480.089
Corrective action
1. Acknowledge alarm.
2. Attempt to restart engine.
ZKP-Number: 18.004.638
Corrective action
u Check sensor and cabling, replace as necessary.
ZKP-Number: 18.004.639
Corrective action
u Check sensor and cabling, replace as necessary.
ZKP-Number: 10.480.093
Corrective action
1. Check cabling of speed sensors.
2. Check for additional messages.
3. Contact Service.
ZKP-Number: 12.500.102
Corrective action
u Check sensor and cabling, replace as necessary.
ZKP-Number: 20.480.195
Corrective action
u Check coolant circuit.