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068 – SS T-Coolant
Red alarm. Engine shutdown.
Associated parameter 2.0120.932
Cause
Corrective action
Coolant temperature after engine
too high (limit value 2). Engine
coolant pump failure, volumetric
flow too low, air in engine coolant
circuit.
u
Check engine coolant circuit.
089 – SS Engine Speed too Low
Red alarm. Engine shutdown.
Associated parameter 2.2500.030
Cause
Corrective action
Engine stalls. In normal operation
the engine speed is below the
limit set in parameter 2.2500.027
(engine stall speed limit) and no
engine stop is applied. The engine
is shutdown for safety reasons.
1. In parallel operation connected to mains:
• Check mains for frequency drop.
• Check generator and coupling for damage.
2. In isolated operation:
• Check restrictor flap position.
• Check restrictor flaps for implausible closing. If restrictor flaps
are fully open: Check if load step values are admissible.
• Check bypass position.
• Check air filter for contamination, replace if contamination is
• Check exhaust back pressure.
• Check differential pressure over mixture cooler.
• Check emissions and injection timing (→ Page 47) (→ Page 176).
• Check oil separator efficiency (oil in compressor intake elbow),
clean compressor as necessary.
• Check valve clearance (→ Page 180).
• Check gasket between mixture line and cylinder head for
correct installation position.
090 – SS No Idling Speed
Red alarm. Start is terminated.
Associated parameter 2.1090.925
Cause
Corrective action
Idling speed was not attained.
1. Check ignition.
2. Check gas supply.
3. Check mixture setting.
091 – SS No Runup Speed
Yellow alarm.
Associated parameter 2.1090.924
Cause
Corrective action
The speed (starter DISENGAGE)
was not attained, ignition not
working or no gas available.
1. Check ignition.
2. Check gas supply.
3. Check mixture setting.
128 | Troubleshooting | MS150104/03E 2017-09
TIM-ID: 0000038612 - 003