InverterFR-A800Verification pending — cross-check with the official manual
FR-A800 CF — Continuous operation during communication fault
Alarm — operational, inspection needed
CAUSE
Why does it occur?
Appears when the operation continues while an error is occurring in the communication line or communication option (when Pr.502 = "4"). • Check for a break in the communication cable. • Check for communication option faults.
REMEDY · Step by step
How to fix it?
• Check the connection of communication cable. • Replace the communication option.
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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