Disclaimer: This content is for informational and educational purposes only. The diagnostic steps described are suggestions, not an official service manual.
Phenomenon: The inverter displays Error 117 on the screen, with fault LED illuminated (often red). No grid connection or power output.
Technical Causes:
- Failure in internal relay or relay control circuit.
- Intermittent contact issues in relay.
Diagnostic Procedure:
- Power cycle the inverter fully (disconnect DC/AC, wait 10 minutes).
- Observe if error occurs immediately or after grid synchronization attempt.
Resolution:
- Restart may clear intermittent faults temporarily.
- Persistent error requires internal relay or control board inspection/replacement.
WARNING: Maintenance and repair of PV systems, high-voltage DC, and AC components must only be performed by certified professionals with valid electrical qualifications (e.g., SEP/G1 in Poland, or local European equivalents). Unauthorized opening of the inverter housing will void the warranty and carries a risk of electric shock or fire.
In case of persistent hardware failure, the only authorized path for repair is contacting the official Growatt Service Department.