Schneider Conext error code F57
FET1 over-temperature shutdown: internal temperature is over 105 degC; the fault clears when temperature drops to 75 degC. Causes incl. high AC input voltage while charging, too-large a load too long while inverting, high ambient, failed cooling fan, blocked airflow, or charge rate too high.
What to check, and in what order, is in the app. The flow Coach Electrical — entry diagnostic (converters / inverters / solar / monitors) walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Conext XW Inverter/Charger Maintenance (Service) Guide 977-0017-01-01 Rev B (covers XW 6048 / XW 4548 / XW 4024)Schneider Electric
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