Tracks under-voltage and over-voltage conditions.
The manual contains a "Signaling" section explaining the LED lights on the front face. This is the fastest way to troubleshoot without a multimeter. lovato 31 rgam 12 user manual
The series is a family of heavy‑duty rotary cam switches designed for industrial and commercial electrical applications. They are modular, compact, and rated up to 31A (depending on model). The switch you reference — RGAM 31 12 — is likely a 31A, 12‑terminal device used for changeover (transfer) or selector functions. Tracks under-voltage and over-voltage conditions