5-20 BA 50Z3/6003 en – Edition 4.3 * * 5003b520.fm
Maintenance
Alarm messages
An alarm code is displayed as soon the diesel fuel particulate filter controls identify an
error, or if the upper or lower temperature or exhaust gas back pressure thresholds have
been crossed.
The following alarm codes can be displayed:
Indication
All LEDs off, the alarm symbol flashes.
Error
No communication between the display and the controls.
Troubleshooting
• Switch off ignition and switch it back on again.
• Check the wiring.
Indication
All LEDs flash, the alarm symbol flashes.
Error
Software not identical for display and controls.
Troubleshooting
Contact an authorized workshop.
Indication
Pressure LED 1, alarm LED 2 and alarm symbol flash.
Error
Lower limit of exhaust gas counterpressure exceeded.
Troubleshooting
• Check pressure hose and line for leaks.
• Check particulate filter and input pipe for leaks.
• Contact an authorized workshop.
Indication
Pressure LED 1, alarm LED 4 and alarm symbol flash.
Error
No pressure change during the last 10 minutes.
Troubleshooting
• Engine does not start.
☞ Start the engine.
• Absolutely constant engine load.
• Clogged pressure line.
☞ Contact an authorized workshop.
Fig. 272: Error: communication
Fig. 273: Error: software
Fig. 274: Error: lower limit of exhaust gas pressure exceeded
Fig. 275: Error: no pressure change