Mitsubishi Electric 1620

Brand: Mitsubishi ElectricModel: PLC (FX5U / iQ-R / iQ-F Series)Error code: 1620

What the Fault Means

Battery error (low voltage)

Likely causes

  • Backup battery in Q/iQ-R CPU approaching end of life

Solution and Safe First Checks

  1. Replace lithium battery (Q6BAT or model-specific); check battery status in GX Works3

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 1620 · Zeror.ai