MTU 20V4000Lx2x Operating Instructions Manual page 110

266 – SD Speed Demand
Red alarm.
Associated parameter 2.8006.586
Cause
Speed setting signal can no longer
be transmitted from plant.
381 – AL Wiring TOP 1
Yellow alarm.
Associated parameter 2.8006.638
Cause
Short circuit or wire break at
transistor output, plant-side 1
(TOP 1). Activation of yellow
combined alarm faulty.
382 – AL Wiring TOP 2
Red alarm.
Associated parameter 2.8006.639
Cause
Short circuit or wire break at
transistor output, plant-side 2
(TOP 2). Activation of red
combined alarm faulty.
383 – AL Wiring TOP 3
Red alarm.
Associated parameter 2.8006.640
Cause
Short circuit or wire break at
transistor output, plant-side 3
(TOP 3). Activation of gas supply
solenoid valve No.1 faulty.
384 – AL Wiring TOP 4
Red alarm.
Associated parameter 2.8006.641
Cause
Short circuit or wire break at
transistor output, plant-side 4
(TOP 4). Activation of gas supply
solenoid valve No.2 faulty.
110 | Troubleshooting | MS150122/00E 2015-07
Corrective action
u Check signal and cabling between plant and ADEC.
Corrective action
u Check cabling.
Corrective action
u Check cabling.
Corrective action
u Check cabling.
Corrective action
u Check cabling.