InverterFR-F800Verification pending — cross-check with the official manual
FR-F800 UF — UF
Alarm — operational, inspection needed
CAUSE
Why does it occur?
- Appears when an excessive current flows into the USB A connector
- Check if a USB device other than a USB memory device is connected to the USB A connector
REMEDY · Step by step
How to fix it?
- If a device other than a USB memory device is connected to the USB A connector, remove the device. Setting Pr
- 1049 "USB host reset "= "1" or inverter reset clears the UF indication
Do not reset repeatedly before identifying the cause. Repeated resets while ignoring a trip/alarm can cause secondary damage (IGBT failure, motor winding damage, etc.).
SOURCE
Related manual page
Summary based on the official Mitsubishi Electric manual. For accurate and complete information, always consult the official manual.
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