MTU 12 V 4000 L62FB Operating Instructions Manual page 117

570 – L1 Al CAN Max. Retarded Timing
Yellow alarm.
Associated parameter 2.1200.931
Cause
The cylinder set to maximum
retarded timing due to knocking
has violated the first limit value.
571 – L2 Al CAN Max. Retarded Timing
Yellow alarm. Power reduction.
Associated parameter 2.1200.932
Cause
The cylinder set to maximum
retarded timing due to knocking
has violated the second limit
value. Power reduction is initiated.
572 – L3 Al CAN Max. Retarded Timing
Red alarm. Engine shutdown.
Associated parameter 2.1200.933
Cause
The cylinder set to maximum
retarded timing due to knocking
has violated the third limit value.
583 – AL GLS closed
Red alarm. Engine shutdown.
Associated parameter 2.0451.115
Cause
Generator load switch does not
open when engine stops. Engine
is motoring.
617 – LO Current Heat Value of Fuel
Yellow alarm.
Associated parameter 2.1210.006
Cause
Fuel calorific value has undershot
the first limit value
Corrective action
1. Check emissions.
2. Check ignition timing (→ Page 140).
3. Check combustion chamber.
4. Check gas quality if feasible (methane number).
Corrective action
1. Check emissions.
2. Check ignition timing (→ Page 140).
3. Check combustion chamber.
4. Check gas quality if feasible (methane number).
Corrective action
1. Check emissions.
2. Check ignition timing (→ Page 140).
3. Check combustion chamber.
4. Check gas quality if feasible (methane number).
Corrective action
1. Check generator load switch.
2. Manually disconnect generator switch.
3. Open any existing mains circuit breaker.
4. Where possible, do not operate manual emergency stop.
Corrective action
u Check gas quality if feasible.
MS150098/02E 2016-11 | Troubleshooting | 117