LV2-Trip (Battery undervoltage, U<22 V)

What does 122 mean?

This fault indicates a battery undervoltage condition where the battery voltage has dropped below 22V (KPS-600). This is critical for maintaining volatile memory or providing backup power, and sustained low voltage can lead to data loss or operational issues.

• LV2-Trip: Battery undervoltage detected (e.g., U<22V) (P1-19).
• Buffer battery voltage has fallen below the minimum threshold.
• External power loss impacting buffer battery.
• Internal battery protection circuit activated.

Click steps to track your progress.

1. 1

   Measure the battery voltage directly at its terminals — expect >22V.

2. 2

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

3. 3

   Check battery terminal connections for corrosion or looseness.