MTU 8V4000Lx4 Operating Instructions Manual page 136

571 – L2 AI 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 AI CAN Max Retarded Timing
Red alarm. Engine stop.
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 stop.
Associated parameter 2.0451.005
Cause
Generator load switch does not
open when engine stops. Engine
is motoring.
603 – SD Air Humidity
Yellow alarm.
Associated parameter 1.0165.900
Cause
Air humidity sensor defect.
Short circuit or wire break
604 – AL Hut Changespeed max.
Yellow alarm.
Associated parameter 2.1210.910
Cause
Gas qualities change too
quickly.
136 | Troubleshooting | MS15026/00E 2015-05
Corrective action
1. Check emissions.
2. Check ignition timing (→ Page 163).
3. Check combustion chamber.
4. Check gas quality if feasible (methane number).
Corrective action
1. Check emissions.
2. Check ignition timing (→ Page 163).
3. Check combustion chamber.
4. Check gas quality if feasible (methane number).
Corrective action
1. Check generator load switch.
2. Disconnect generator switch manually.
3. Open mains power switch if available.
4. Do not actuate manual emergency off if possible.
Corrective action
u Check sensor and cabling, replace as necessary.
Corrective action
u Check gas system.