U30 High Warning
â–¶ How to fix
• Reset DTC • Toggle ignition key to "key off" and await system reset then "key on" i.e. system wake up. • Read out DTC's again • Turn off DCC • Check the 24V-battery configuration. • Measure the 24V battery voltage. it should be within normal voltage levels. i.e. 22 - 26V. • If over voltage detected replace 24V battery
What you'll see
No driver-visible symptom recorded.
System reaction
Continue normal operation until voltage is above 35 V.
Diagnostic depth
Detection
The following DCC2 event is active: U30HighWarningLimit Set when external input voltage is higher than 30V.
Possible cause
External power supply to unit is high.