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Jonathan SchneiderAug 9, 2025
What to do if my Falcon SG3K-1SC has a Fault LED?
- AAndrew MartinAug 9, 2025
If the Fault LED is on, read the error code displayed on the LCD to identify the fault. If you see error code Er05 or Er39, check the battery connection and voltage, recharge the batteries for 8 hours if needed, and test the UPS during a simulated outage. For an overload, disconnect non-critical devices until it ceases and inspect cables for short circuits. If the error code is Er11, ensure the ventilation is clear and the fans are working. For site wiring issues, check the AC source wiring and ground-neutral voltage. If the error code is Er14, verify the fans are functioning properly.