IBU unvalidated serial number
â–¶ How to fix
Perform validation service with SDP3
What you'll see
No driver-visible symptom recorded.
System reaction
• Contactor close is inhibited until service routine after BMU, IBU or battery pack replacement is made. • VOR, the hybrid system will not work since the battery will not be engaged. The DCC will not receive VCB-power and the 24-volt system will drain the 24-volt batteries. • Amber warning lamp "24V batteries not charged" and "Hybrid System Fault" is shown in ICL
Diagnostic depth
Detection
The latest IBU serial number read by the BMU (E81) does not match the current IBU serial number.
Possible cause
The IBU, battery pack or BMU has been replaced