17

Open Circuit Detection Triggered Multiple Times

Fronius · Perfect Charging

What does 17 mean?

The charger has repeatedly detected an open circuit condition during a charge cycle, indicating poor or intermittent contact in the charging path. This suggests a physical wear or damage that intermittently interrupts the flow of charging current.

Common Causes

  • Worn, corroded, or damaged charging contacts on either the battery plug, the charger connector, or within the battery's terminals.
  • Loose electrical connections at the battery terminals or within the charging cable assembly.
  • An intermittent break or high resistance point within the charging circuit wiring itself.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the charging contacts on both the charger's output connector and the battery's input plug for signs of wear, pitting, corrosion, or physical damage.

  2. 2

    Verify the tightness and security of all electrical connections in the charging cable path, including connections to the battery terminals and within the charger housing.

  3. 3

    Measure the continuity of the entire charging cable assembly, flexing the cable to identify any intermittent breaks.

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Verified technical data. Last updated: March 2026

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