LV3-Trip (Battery undervoltage, U<19 V)

What does 123 mean?

This fault indicates a more severe battery undervoltage condition where the battery voltage has dropped below 19V (KPS-600). At this critical level, system functions relying on battery power may become unstable or fail completely, risking data integrity.

1. 1

   Measure the battery voltage directly at its terminals — expect >19V.

2. 2

   Verify the battery charger is functioning correctly and providing adequate charge current.

3. 3

   Check battery terminal connections for corrosion or looseness.