InverterFR-A800Verification pending — cross-check with the official manual
FR-A800 E.SER — Communication fault (inverter)
Trip — immediate stop
CAUSE
Why does it occur?
- The inverter output is shut off when communication error occurs consecutively for the permissible number of retries or more when Pr.335 RS-485 communication retry count ≠ "9999" during RS-485 communication through the RS-485 terminals
- The inverter output is also shut off if communication is broken
REMEDY · Step by step
How to fix it?
Perform wiring of the RS-485 terminals properly.
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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