📝 Description

Used and tested product. Original Fronius IG-BRAIN2 electronic board, article number 4.071.093, designed for the logical management and operational control of compatible Fronius photovoltaic inverters.
This board is an electronic processing and control unit: it manages the inverter's operating logic, processes information from internal circuits, and contributes to operational monitoring and diagnostic reporting.
The component is intended for the Fronius IG Plus 55 V-1 photovoltaic inverter. Fronius officially identifies code 4.071.093 as an IG-BRAIN2 board in its spare parts and service documentation. Compatibility with the specific equipment must be verified based on the hardware revision and installed configuration.

⚙️ Main Specifications

• Manufacturer: Fronius International GmbH
• Designation: IG-BRAIN2
• Article number: 4.071.093
• Type: Electronic logic control board
• Reference application: Fronius IG Plus 55 V-1
• Function: Processing and management of inverter operating logic
• LED indicators: POWER and STATUS
• Connections: Multipole connectors for interfacing with the internal electronics
• Installation: Inside a compatible inverter

🔧 Main Functions

• Manages the operating logic of the photovoltaic inverter.
• Processes information from internal circuits.
• Coordinates operating sequences and operating conditions.
• Monitors the equipment's operating status.
• Supports diagnostic reporting.
• Interfaces with the inverter's other electronic circuits.

🔌 Purpose and Operation

The IG-BRAIN2 board is a component of the inverter's electronic control system. It processes information from measurement and monitoring circuits and contributes to coordinating the equipment's operating functions.
The two indicators on the board are labelled:

• POWER: Indicates that power is supplied to the board.
• STATUS: Indicates the operating status and must be interpreted according to the manufacturer's technical documentation.
  The board works together with the inverter's other electronic circuits and must not be confused with a power board or a simple communication interface.

🧩 Compatibility

Reference inverter:

• Fronius IG Plus 55 V-1
  The IG Plus 55 V-1 belongs to the Fronius IG Plus family, documented by the manufacturer in the series' official datasheet.
  Before purchasing, it is advisable to verify:
• The original board code: 4.071.093.
• The hardware revision.
• The inverter's complete model designation.
• The matching connectors and electronic configuration.
  Note: Compatibility with other IG Plus models must not be assumed automatically.

⚠️ Possible Faults and Associated Symptoms

A control board malfunction may be associated with symptoms such as:

• The inverter does not complete its startup sequence.
• Abnormal shutdowns or restarts.
• Persistent error messages.
• Irregular communication between internal electronic circuits.
• Inconsistent operating behaviour.
  These symptoms do not necessarily prove that the IG-BRAIN2 board is the cause. Power supplies, wiring, sensors, and power circuits should also be checked.

🔍 Diagnostics

Before replacing the board, it is advisable to:

1. Check the power supplies according to the manufacturer's specifications.
2. Inspect the connectors and wiring.
3. Consult any inverter error codes.
4. Check the POWER and STATUS indicators according to the technical documentation.
5. Compare the code and revision of the installed board with those of the replacement.

🛠️ Applications

• Repair of compatible Fronius photovoltaic inverters.
• Replacement of faulty logic boards.
• Maintenance of control electronics.
• Restoration of inverter monitoring and management functions.
• Technical servicing of photovoltaic systems equipped with Fronius IG Plus inverters.

🛡️ Product Condition

Used electronic board, with components and connectors visible in the photographs.
Identification is based on the code printed on the label. The photographs do not certify the component's electrical functionality.
Functional status: to be verified by testing.

📦 Package Contents

• 1 Fronius IG-BRAIN2 electronic board.
• Article number: 4.071.093.
• Components and connectors as shown in the photographs.

🟢 Summary

Original Fronius IG-BRAIN2 logic board, code 4.071.093, intended as a replacement for the Fronius IG Plus 55 V-1 photovoltaic inverter.
It is designed to manage the inverter's operating logic and monitoring functions. It is a replacement part for maintenance and repair, subject to verification of compatibility with the exact model.
Safety warning: Installation and replacement must be carried out by qualified personnel, with the inverter completely disconnected from the power supply and in accordance with the manufacturer's procedures.