MTU 12V4000M*3 series Operating Instructions Manual page 177

120 – HI ECU Power Supply Voltage
Supply voltage too high (limit value 1)
Yellow alarm; warning
Cause
Supply voltage at Engine Control
Unit too high.
121 – HIHI ECU Power Supply Voltage
Supply voltage too high (limit value 2)
Red alarm - start cancelation of engine stop
Cause
Supply voltage at Engine Control
Unit too high.
122 – HI T-ECU
Electronics temperature too high (limit value 1)
Yellow alarm; warning
Cause
Electronics overheated.
141 – AL Power too high
Maximum value exceeded
Yellow alarm; warning
Cause
Power mean value has exceeded
the specified maximum value in
the last 24 hours.
142 – AL MCR exceeded 1 hour
MCR exceeded
Yellow alarm; warning
Cause
MCR was exceeded in the last 12
hours for longer than one hour.
ZKP-Number: 2.0140.931
Corrective action
1. Check Engine Control Unit supply voltage.
2. Contact Service.
ZKP-Number: 2.0140.932
Corrective action
1. Check Engine Control Unit supply voltage.
2. Contact Service.
ZKP-Number: 2.0132.921
Corrective action
1. Reduce power.
2. Improve engine room ventilation.
ZKP-Number: 1.1088.007
Corrective action
u Contact Service.
ZKP-Number: 1.1088.006
Corrective action
u Contact Service.
MS15036/00E 2018-08 | Troubleshooting | 175