067 – HI T-Coolant
Yellow alarm.
Associated parameter 2.0120.931
Cause
Corrective action
Coolant temperature after engine
too high (limit value 1). Engine
coolant pump failure, volumetric
flow too low, air in engine coolant
circuit.
u
Check engine coolant circuit.
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 is being stalled. In normal
operation the engine speed is
below the limit set in parameter
2.2500.027 (Engine stall speed
limit) without an engine stop
having taken place. The engine is
shut down for safety reasons.
1. In mains parallel operation:
• 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 154).
• Check oil separator efficiency (oil in compressor intake elbow),
clean compressor as necessary.
• Check valve clearance (→ Page 155).
• Check gasket between mixture line and cylinder head for
correct installation position.
110 | Troubleshooting | MS150098/03E 2018-04
TIM-ID: 0000027858 - 002
