MTU 8V4000Lx4 Operating Instructions Manual page 113

021 – HI T-Exhaust B
Yellow alarm.
Associated parameter 2.0127.931
Cause
Exhaust gas temperature (B
side) after turbine too high (limit
value 1). Incorrect ignition
timing, mixture too lean or too
rich, damage to turbine.
022 – SS T-Exhaust B
Red alarm.
Associated parameter 2.0127.932
Cause
Exhaust gas temperature (B
side) after turbine too high (limit
value 2). Incorrect ignition
timing, mixture too lean or too
rich, damage to turbine.
025 – HI P-Diff. Lube Oil
Yellow alarm.
Associated parameter 2.0154.931
Cause
Pressure loss via oil filter too
high (limit value 1).
026 – HI P-Diff. Lube Oil
Yellow alarm. Engine stop.
Associated parameter 2.0154.932
Cause
Pressure loss via oil filter too
high (limit value 2).
030 – SS Engine Overspeed
Red alarm. Engine stop.
Associated parameter 2.2510.932
Cause
Overspeed detected by ECU.
This fault message usually
follows other fault messages.
Check governor, throttle closing
position.
Corrective action
1. Check exhaust turbocharger.
2. Check ignition timing (→ Page 163).
3. Check mixture setting.
4. Check spark plugs.
Corrective action
1. Check exhaust turbocharger.
2. Check ignition timing (→ Page 163).
3. Check mixture setting.
4. Check spark plugs.
Corrective action
1. Replace oil filter (→ Page 178).
2. If this fault occurs again after unexpectedly short filter runtime,
check oil filter for deposits, change oil if required (→ Page 176).
Corrective action
1. Replace oil filter (→ Page 178).
2. If this fault occurs again after unexpectedly short filter runtime,
check oil filter for deposits, change oil if required (→ Page 176).
Corrective action
1. Check governor.
2. Check throttle closing position.
MS15026/00E 2015-05 | Troubleshooting | 113