MTU 12 V 4000 L62FB Operating Instructions Manual page 93

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,
incorrect spark plug type, 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,
incorrect spark plug type, 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).
Corrective action
1. Check exhaust turbocharger.
2. Check ignition timing (→ Page 140).
3. Check mixture setting.
4. Check spark plugs.
Corrective action
1. Check exhaust turbocharger.
2. Check ignition timing (→ Page 140).
3. Check mixture setting.
4. Check spark plugs.
Corrective action
1. Replace oil filter (→ Page 156).
2. If this fault message occurs again after unexpectedly short filter
runtime, check oil filter for deposits, change oil if required
(→ Page 154).
Corrective action
1. Replace oil filter (→ Page 156).
2. If this fault message occurs again after unexpectedly short filter
runtime, check oil filter for deposits, change oil if required
(→ Page 154).
MS150098/02E 2016-11 | Troubleshooting | 93