32

Timeout in U1 Phase

Fronius · Perfect Charging

What does 32 mean?

The battery charger experienced a timeout during the U1 (initial constant voltage) charging phase. This suggests the battery could not absorb current as expected or reach a stable state within the defined time, potentially indicating a battery health issue or charger malfunction.

Common Causes

  • The battery is not absorbing current at the expected rate in the U1 phase, indicating potential degradation or internal resistance issues.
  • Incorrect charger settings for the U1 phase timeout value, which may be set too short for the battery's condition.
  • A faulty voltage measurement or regulation circuit within the charger, leading to incorrect detection of the U1 phase end condition.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the charger's output voltage and current measurement accuracy during the U1 phase.

  2. 2

    Check the charger's configuration for the U1 phase timeout setting (parameter, if available) and ensure it is suitable for the battery type and condition.

  3. 3

    Assess the battery's overall condition, as it may not be accepting charge properly due to age or damage.

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Verified technical data. Last updated: March 2026

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