The Lovato 31 RGAM 12 is a microprocessor-based automatic transfer unit designed for the comprehensive management of stand-by generating sets. It serves as a central controller that monitors both mains and generator supplies to ensure seamless power transitions during failures. Core Functionality & Operation Modes

: Allows the operator to manually start and stop the generator using the front-facing buttons. AUT (Automatic)

Here are the most helpful features and instructions found in the user manual for this device, explained simply.

Automatic: Automatically starts the generator and switches power during a mains failure.

2. Asymmetric Window Mode (Over & Under Voltage)

Most users set these relays for "Under voltage" only, but the manual describes a more protective "Window Mode."

If you can confirm the exact model number from the device’s label (e.g., RGAM 12 / 31 / something else), I can provide the correct original manual content or a precise report. You may also download the official Lovato manual from the Lovato Electric website (Documents → Rotary Switches → RGAM series).

MAN (Manual): Start or stop the generator manually using the START and STOP buttons.