Lop Fault Messages - MTU 12 V 2000 M40A Operating Instructions Manual

6.3 LOP fault messages

LOP
Fault messages and measuring points (status reports) are displayed as text messages on the LOP dis‐
play (DIS). Explanation of the displayed texts can be gathered by pressing the help key on the
touchscreen. Fault messages can also be caused by faulty sensors/actuators. Contact Service to have
sensors/actuators checked and replaced as necessary if the troubleshooting measures listed in the table
below prove unsuccessful.
Display text
AL RCS Speed De‐
mand Defect
AL Shutdown Expect‐
ed
AL Battery Charge
Fault
AL Press. Monitoring
Fail (EMU)
AL ECU Defective
AL Output Stage
Bank 1 Fault
Meaning
No speed demand signal
Yellow alarm occurred; Red alarm with
engine shutdown will probably follow
Battery not being charged
EMU pressure monitoring failure
ECU 4 is defective
Fault message re. power amplifier, cyl‐
inder bank A
Measure
1. Check speed demand source sys‐
tem (e. g. from automatic on-board
network).
2. Check LOP visually (→ Page 230).
3. Perform LOP test procedures
(→ Page 232).
4. Check ECU plug connection
(→ Page 225).
5. Check engine wiring (→ Page 221).
1. Start other genset
as preventive measure.
2. Determine cause of yellow alarm
and rectify.
1. Check power circuit breakers and
fuses.
2. Check transistorized regulator.
Contact Service.
• Have EMU replaced.
1. Check LOP visually (→ Page 230).
2. Perform LOP test procedures
(→ Page 232).
3. Check ECU plug connection
(→ Page 225).
4. Check engine wiring (→ Page 221).
5. Contact Service.
• Have ECU checked and re‐
placed if required.
1. Check LOP visually (→ Page 230).
2. Perform LOP test procedures
(→ Page 232).
3. Check ECU plug connection
(→ Page 225).
4. Check engine wiring (→ Page 221).
5. Contact Service.
• Have ECU checked and re‐
placed if required.
MS150031/05E 2013-01 | Troubleshooting | 135