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Lovato 31 Rgam 12 User Manual May 2026

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

The unit operates in several distinct modes to accommodate various industrial needs:

Automatic Mode: Continuously monitors the mains supply. Upon detecting an anomaly, it initiates the generator start cycle and manages the transfer of the load.

Manual Mode: Allows operators to start or stop the engine directly using the Start and Stop keys on the front panel.

Test Mode: Permits scheduled or manual test cycles to verify generator readiness without necessarily transferring the load.

Off/Reset: Disables the unit's control functions and resets active alarms. Technical Specifications Power Supply Supports 12VDC or 24VDC battery systems. Voltage Control

Three-phase mains supervision and single-phase generator control (70–624VAC range). Display

3-digit LED/LCD reading display for voltage, frequency, battery status, and operating hours. Communication

Serial RS232 or RS485 interfaces for remote supervision and PC-based configuration. Programmability

Fully customizable input/output functions and operating parameters. Monitoring & Alarm Codes

The 31 RGAM 12 actively supervises engine and alternator health, displaying specific codes for faults: A01: Low oil pressure. A02: Engine overheating. A05/A06: Low or high battery voltage. A10/A11: Low frequency or generator overload. A13: Emergency stop activated. Remote Supervision

Users can extend the controller's capabilities using the RGAM.EXE software. This allows for:

Remote Monitoring: Real-time viewing of status, alarms, and event logs (up to 255 events) via modem or GSM.

Parameter Management: Consulting and modifying setup parameters protected by password access.

Network Integration: Ability to connect up to 32 units under one central control system using RS485.

For detailed wiring diagrams and advanced setup tables, refer to the Lovato Electric RGAM Manual. Lovato RGAM Automatic Transfer Unit Guide | PDF - Scribd

The Lovato 31 RGAM 12 is a microprocessor-controlled automatic transfer unit designed to manage stand-by generating sets. It primarily monitors mains power anomalies and automatically initiates a generator start-up cycle to ensure power continuity. 🛠️ Key Technical Specifications

The unit is engineered for flexibility across different electrical environments:

Power Supply: Operates on a 12VDC battery supply (range: 6.2–16.5VDC).

Mains Control: Provides three-phase monitoring with a voltage operating range of 70–624VAC. Generator Control: Features single-phase voltage control.

Frequency: Supports 50Hz or 60Hz, configurable via the keypad. lovato 31 rgam 12 user manual

Display: Includes a 3-digit reading display for alarms, status messages, and electrical readings. 🚦 Operating Modes & Interface

The front panel allows users to switch between three primary operating modes:

Manual (MAN): Direct control via START and STOP buttons. Users can manually switch the load between mains and the generator.

Automatic (AUT): The unit automatically detects mains failure, starts the engine, and transfers the load.

Test/Self-Test: Allows for periodic testing of the generator without necessarily transferring the load. ⚠️ Common Alarm Codes

The 31 RGAM 12 uses specific codes to indicate system failures: A01: Low oil pressure A02: Engine overheating A04: Failure to start (match) A05 / A06: Low or high battery voltage A09 / A10: Generator over-frequency or low frequency A13: Emergency stop triggered 💻 Configuration & Remote Software

For advanced setup, the unit can be connected to a PC via a serial interface (RS232/RS485).

RGAM.EXE Software: This tool allows installers to modify parameters, view event logs, and perform remote supervision.

Customization: Parameters (identified as "P.xx") can be adjusted to customize startup times, tripping thresholds, and alarm delays.

Modem Support: Some versions support "Autocall" functions for sending status notifications via SMS or email.

If you're comfortable sharing,xx codes) for deep configuration. Wiring diagrams for specific terminal connections.

Troubleshooting steps for a specific alarm code you're seeing. Lovato RGAM - Software Serial | PDF | Modem - Scribd

Understanding the Lovato 31 RGAM 12: A Comprehensive Guide The Lovato 31 RGAM 12 is a specialized automatic mains failure (AMF) controller designed for managing engine-driven generator sets. If you are looking for the "user manual," you are likely trying to install, program, or troubleshoot this specific module.

While the physical booklet is often tucked away in a control panel, this guide serves as a comprehensive overview of the technical specifications, wiring logic, and programming steps required to get your RGAM 12 up and running. 1. Device Overview

The RGAM 12 is part of Lovato Electric’s legacy series of controllers. It is engineered to monitor a single-phase or three-phase mains supply and automatically start a generator if the mains voltage falls outside of preset limits. Once the generator is running and stable, the RGAM 12 manages the transfer of the load from the mains to the generator. Key Features:

Automatic Start/Stop: Initiates the engine crank cycle upon power failure.

Engine Protection: Monitors oil pressure, engine temperature, and fuel levels.

Voltage Monitoring: Tracks under-voltage and over-voltage conditions.

User Interface: Features LED indicators for status updates and tactile buttons for manual control. 2. Technical Specifications

Before wiring the device, ensure your system matches these electrical requirements: The Lovato 31 RGAM 12 is a microprocessor-based

Supply Voltage: Typically 12VDC (indicated by the "12" in the model name). Mains Voltage Input: 100–480VAC. Operating Temperature: -20°C to +60°C.

Outputs: Relay outputs for fuel solenoid, starter motor, and alarm signaling. 3. Installation and Wiring

The back of the RGAM 12 features a series of screw terminals. Accurate wiring is critical to prevent damaging the controller or the generator’s alternator. Basic Terminal Mapping:

DC Power (Terminals 1 & 2): Connect to the 12V battery. Ensure correct polarity (Terminal 1 is usually negative/ground).

Mains Sensing: Connect the mains phases to the designated sensing inputs to allow the device to detect power outages.

Generator Sensing: Connect the alternator output phases so the controller knows when the generator has reached the correct voltage and frequency. Control Outputs: Start: Connects to the starter motor relay. Fuel: Connects to the fuel stop-solenoid.

Digital Inputs: Connect sensors for Low Oil Pressure (LOP) and High Engine Temperature (HET). 4. Front Panel Operation

The RGAM 12 interface is designed for simplicity. It usually features three primary modes:

OFF: The controller is disabled. No automatic functions will occur, and the engine cannot start. Use this mode during maintenance.

MAN (Manual): Allows the operator to start and stop the engine manually using the "Start" and "Stop" buttons.

AUT (Automatic): The standard operating mode. The device constantly monitors the mains and will take over automatically during a blackout. 5. Programming and Configuration

To access the internal settings (thresholds, timers, and delays), you must enter the programming mode. Common Adjustable Parameters:

Mains Delay: The time the controller waits after a power failure before starting the engine (to avoid "nuisance starts" during momentary flickers).

Crank Time: How long the starter motor engages during an attempt.

Cool-down Timer: How long the generator runs without a load before shutting down once mains power returns.

Voltage Thresholds: Setting the "Low Voltage" limit (e.g., 180V on a 230V system) that triggers a start. 6. Troubleshooting Common Issues

If your RGAM 12 isn't behaving as expected, check the following:

"Fail to Start" Alarm: This occurs if the engine undergoes its set number of crank attempts without firing. Check fuel levels, battery strength, and the fuel solenoid.

Device Won't Power Up: Verify the fuse on the DC supply line and check that the battery voltage is at least 10.5V.

Mains Not Detected: If the mains are healthy but the generator keeps running, check the sensing fuses or the voltage calibration in the settings. Green LED: Supply voltage is present

The Lovato 31 RGAM 12 is a "set and forget" device. Once the wiring is verified and the timers are calibrated to your specific engine's needs, it provides reliable protection for your facility.

Always consult a qualified electrician or generator technician before modifying high-voltage control panels.

Master Your Generator: A Guide to the Lovato 31 RGAM 12 Controller If you are managing a backup power system, the Lovato 31 RGAM 12

is the "brain" that ensures your transition from mains to generator power is seamless. This microprocessor-controlled unit is an industry standard for Automatic Mains Failure (AMF)

applications, designed to start your generator automatically the moment it detects a power anomaly.

Whether you've just inherited one of these units or are performing routine maintenance, here is everything you need to know about the 31 RGAM 12. Key Features at a Glance 31 RGAM 12

is engineered for 12VDC systems and offers robust monitoring for both your engine and alternator Three-Phase Mains Control:

Monitors all three phases of your main power supply for voltage drops or phase loss. Remote Ready: Features a built-in RS232 port

for PC connection, allowing for remote troubleshooting and status monitoring. User Interface:

Equipped with a 3-digit LED display and a front keypad for manual parameter programming without needing external tools. Durability:

Housed in a standard 144x144mm frame, it’s designed for easy panel mounting. Understanding Operating Modes

The unit features four distinct modes of operation, selectable via the front panel: OFF / RESET: Stops the engine and resets any active alarms. MAN (Manual):

Gives you full control. You can manually start/stop the engine and switch the load between mains and generator using the dedicated AUT (Automatic):

The default setting for standby power. The unit monitors the mains and will automatically initiate the start sequence if power fails.

Periodically runs the generator to ensure it is operational without necessarily switching the load. Common Alarm Codes

If your unit is flashing a code, here are the most frequent ones found in the Lovato RGAM Guide Low Oil Pressure Engine Overheating Low Fuel Level

Starting Failure (the engine failed to start after the preset number of attempts) Low Battery Voltage Pro Tips for Installation & Maintenance Supply Range: The unit operates between 6.2VDC and 16.5VDC

. Ensure your battery charger is maintaining the battery within this range to avoid "High Battery Voltage" (A06) or "Low Battery Voltage" (A05) alarms. Software Setup: For advanced configuration, use the 31 RGAM SW

software. It allows you to save and reload parameters, which is a lifesaver if you ever need to replace a unit. Manual Access: You can find digital copies of the full technical manual on or through authorized distributors like wiring diagram

5. LED Diagnostics

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 — Quick User-Manual Summary

Lovato 31 RGAM 12 User Manual: Complete Guide to Installation, Configuration, and Troubleshooting

Product Code: 31 RGAM 12 Manufacturer: Lovato Electric

B. RGAM 12 – Two-pole changeover (3-position)

Example terminal labeling (changeover version):