Mitsubishi Electric Error 550

Brand: Mitsubishi ElectricModel: PLC (FX5U / iQ-R / iQ-F Series)Error code: Error 550

What the Fault Means

Alarm log storage full

Likely causes

  • Alarm log file capacity reached without archiving

Solution and Safe First Checks

  1. Archive log to SD card; clear log via GT Designer3 alarm log settings

Safety: do not work inside the panel without isolating the power; if unsure, consult a qualified technician.

Related Mitsubishi Electric error codes

Source: the Zeror.ai industrial fault database and Mitsubishi Electric technical documentation. This page is for information; on critical systems follow the manufacturer's manual and authorised service.

Mitsubishi Electric Error 550 · Zeror.ai