Internal circuit fault

What does E.13 mean?

This internal circuit fault stops the inverter output, indicating a generic problem within the inverter's internal electronics. Without more specific diagnostic information, it suggests a hardware malfunction that requires specialized attention. Continued operation with this fault is not possible.

• Failure of internal power supply components (e.g., DC-DC converters, rectifiers) causing incorrect operating voltages for internal control circuits.
• Faulty main control board (PCB) or a damaged component on the board, leading to processing errors or incorrect signal generation.
• Overheating of internal components due to blocked heatsinks, failed cooling fans, or excessively high ambient temperature.
• Corrupted firmware or configuration settings causing the inverter's internal logic to enter an unstable state.
• Voltage spikes or transients on the input power line damaging sensitive internal electronics over time.

Click steps to track your progress.

1. 1

   1. Power cycle the inverter (turn main power OFF, wait 5 minutes, turn ON) to attempt a soft reset of the internal electronics.

2. 2

   2. Visually inspect the inverter's internal components for signs of damage, such as burnt components, bulging capacitors, or discolored PCBs (Power OFF, discharge DC bus before opening).

3. 3

   3. Check the operation of all internal cooling fans. Ensure they are spinning freely and that the heatsinks are free of dust and debris, maintaining proper airflow.

4. 4

   4. Measure the input line voltage (R, S, T terminals) to confirm it is stable and within the inverter's specified operating range (e.g., 380-480VAC) and free of significant transients.

5. 5

   5. Back up current parameters, then perform a factory reset of the inverter parameters to eliminate any corrupted software configuration as a cause. Re-enter parameters manually or restore from backup.