MTU 20V4000Lx2x Operating Instructions Manual page 98

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
Yellow 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 – SS P-Diff. Lube Oil
Red alarm. Engine shutdown.
Associated parameter 2.0154.932
Cause
Pressure loss via oil filter too high
(limit value 2).
98 | Troubleshooting | MS150122/00E 2015-07
Corrective action
1. Check exhaust turbocharger.
2. Check ignition timing (→ Page 143).
3. Check mixture setting.
4. Check spark plugs.
Corrective action
1. Check exhaust turbocharger.
2. Check ignition timing (→ Page 143).
3. Check mixture setting.
4. Check spark plugs.
Corrective action
1. Replace oil filter (→ Page 158).
2. If this fault message occurs again after unexpectedly short filter
runtime, check oil filter for deposits, change oil if required
(→ Page 156).
Corrective action
1. Replace oil filter (→ Page 158).
2. If this fault message occurs again after unexpectedly short filter
runtime, check oil filter for deposits, change oil if required
(→ Page 156).