📝 Description
Used and tested product. Original Fronius IG-BRAIN electronic board, hardware revision V1.5B, identification code 4,071,082, designed as the logic control unit for compatible Fronius photovoltaic inverters.
The IG-BRAIN is a fundamental part of the inverter's control system: it manages logic functions, processes information from internal circuits, and coordinates the operations required for the equipment to function.
This board is identified as a spare part for the Fronius IG Plus 25 V-1. Compatibility with other IG Plus series variants must be verified by comparing the spare-part code, hardware revision, and inverter configuration.
⚙️ Main Specifications
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Manufacturer: Fronius International GmbH
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Designation: IG-BRAIN
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Part number: 4,071,082
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Hardware revision: V1.5B
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Type: Electronic control and logic management board
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Reference application: Fronius IG Plus 25 V-1
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Installation: Inside the inverter
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LED indicators: POWER and STATUS
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Connections: Multipole connectors for interfacing with the inverter electronics
🔧 Main Functions
- Management of inverter control logic.
- Processing of information from internal circuits.
- Coordination of the equipment's operating sequences.
- Monitoring of operating conditions and system status.
- Interface with the inverter's other electronic circuits.
- Support for diagnostic functions and system status indication.
🔌 Purpose and Operation
The IG-BRAIN board is the electronic unit responsible for the inverter's control functions. It receives information from measurement and monitoring circuits, processes it, and coordinates equipment operation according to the manufacturer's specified logic.
The LEDs marked POWER and STATUS help verify the power supply status and certain operating conditions during diagnostic procedures.
The board works in coordination with the inverter's other circuits and should not be confused with a power board or a simple communication interface.
🧩 Compatibility
Reference model:
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Fronius IG Plus 25 V-1
Compatibility with other IG Plus series versions should not be assumed automatically. Before purchasing, compare code 4,071,082, revision V1.5B, and the configuration of the originally installed board.
Fronius documentation for the IG Plus family describes the IG-BRAIN as a component of the inverter control system and outlines procedures for checking its version and identification.
⚠️ Possible Faults and Associated Symptoms
A malfunction of the control board may be associated with symptoms such as:
- The inverter fails to complete its startup sequence.
- Failure to start or abnormal shutdowns.
- Persistent error messages.
- Irregular communication with other internal circuits.
- Inconsistent operating behavior.
Warning: These symptoms do not automatically prove that the IG-BRAIN is responsible for the fault. Power-supply issues, wiring, sensors, the power stage, and other components must also be checked.
🔍 Diagnosis
Before replacing the board, it is advisable to:
- Verify the power supplies specified by the manufacturer.
- Check connectors and wiring.
- Consult any error codes recorded by the inverter.
- Check the POWER and STATUS LEDs according to the technical documentation.
- Compare the code and revision of the installed board with those of the replacement.
🛠️ Applications
- Repair of compatible Fronius photovoltaic inverters.
- Replacement of defective control boards.
- Maintenance of Fronius IG Plus family inverters.
- Restoration of the inverter's logic and monitoring functions.
🛡️ Product Condition
Used board with electronic components and connectors visible in the photographs.
Identification is based on the label showing code 4,071,082 and revision V1.5B.
Functional status: to be confirmed by testing.
📦 Package Contents
- 1 × Fronius IG-BRAIN electronic board.
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Part number: 4,071,082.
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Hardware revision: V1.5B.
- Components and connectors as shown in the photographs.
🟢 Summary
Original Fronius IG-BRAIN V1.5B electronic control board, code 4,071,082, identified as the logic control unit for the Fronius IG Plus 25 V-1 inverter.
This spare part is intended for maintenance and repair of the inverter's control electronics. Before purchasing, it is important to verify the exact part number and hardware revision.
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.
