MTU 12 V 4000 M23F Operating Instructions Manual page 153

502 – AL Open Load POM Battery-charging Generator
Power disruption, battery-charging generator connection of POM
Yellow alarm; warning
Cause
Wiring faulty or no resistance
over switch.
503 – AL Battery Not Charging
No battery charge
Yellow alarm; warning
Cause
Battery is not charged by
battery-charging generator.
504 – AL CAN POM Node Failure
POM missing on CAN bus
Yellow alarm; warning
Cause
If alarm 508 occurs in addition,
the resistor in the POM wiring is
missing.
506 – AL Low Starter Voltage
The battery voltage is too low for the starting process
Yellow alarm; warning
Cause
Wiring faulty or battery is flat.
507 – AL POM Fault
A general POM fault occurred.
Yellow alarm; warning
Cause
Fault in POM.
ZKP-Number: 1.4500.902
Corrective action
u Check connection between POM and battery-charging
generator.
ZKP-Number: 1.4500.903
Corrective action
u Check battery-charging generator and wiring (→ Page 265).
ZKP-Number: 1.4500.904
Corrective action
u Check connection and POM.
ZKP-Number: 1.4500.906
Corrective action
u Check starter battery and wiring (→ Page 265).
ZKP-Number: 1.4500.907
Corrective action
u Replace POM.
MS150068/01E 2014-01 | Troubleshooting | 153