ABB Aurora TRIO 27.6 kW – Main Logic Control Board | CPU Board | Three-Phase Photovoltaic Inverter Module
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Description
The Main Logic Control Board (CPU Board) for ABB / Power-One Aurora TRIO 27.6 kW is the central electronic unit responsible for the complete control and coordination of high-power three-phase photovoltaic inverters.
This board serves as the processing core of the inverter, executing real-time control of all critical operations, including signal processing from sensors, DC/AC conversion management, grid synchronization, and system protection.
It integrates advanced microcontrollers and DSP-based architecture, enabling precise control of electrical parameters and implementation of key algorithms such as MPPT (Maximum Power Point Tracking) for optimized energy production.
The logic board coordinates all internal modules—power stage, AC filter boards, relay boards, and auxiliary systems—ensuring stable, efficient, and safe inverter operation. It also manages communication with external monitoring and supervisory systems.
⚙️ Main Functions
- Centralized inverter control
- MPPT algorithm management
- Supervision of DC/AC conversion
- Continuous monitoring of electrical parameters
- Internal and external communication management
- Fault detection and diagnostic handling
- Control of protection and safety logic
🔌 Role Inside the Inverter
Within the ABB Aurora TRIO 27.6 kW system, this board:
- Coordinates all internal electronic modules
- Processes signals from voltage, current, and temperature sensors
- Generates control commands for power stages
- Manages startup and shutdown sequences
- Controls synchronization with the electrical grid
- Supervises operating conditions and safety protections
👉 It is the primary control unit — essential for inverter operation.
🔧 Technical Features
- High-density multilayer PCB
- Digital architecture with microcontrollers / DSP
- Real-time data processing
- Multiple communication interfaces (internal buses and serial links)
- Isolated sections for analog and digital signals
- Integrated diagnostic and self-test system
- Onboard auxiliary power supply
⚠️ Typical Faults & Symptoms
- Inverter not starting or stuck in standby
- No communication with display or remote monitoring
- Multiple inconsistent or undefined errors
- Continuous restarts or system lockups
- Grid synchronization issues
- MPPT malfunction or unstable performance
🚨 Common Error Codes
These error codes are often associated with logic board faults or communication issues:
- E001 – Internal CPU error
- E002 – EEPROM fault
- E003 – RAM fault
- E004 – Internal communication error
- E005 – ADC conversion error
- E009 – Firmware error
- E011 – DSP communication error
- E013 – Control board error
- E031 – Self-test failure
- E033 – Measurement error
- E035 – Internal bus error
- E042 – Grid synchronization error
🛠 Product Specifications
- Manufacturer: ABB / Power-One (Aurora)
- Compatibility: TRIO 27.6 kW
- Type: Main Logic Control Board / CPU Board
- Application: Three-phase grid-tie photovoltaic inverters
- Function: System control, monitoring, and diagnostics
📊 Applications
- Repair of ABB Aurora TRIO 27.6 kW inverters
- Replacement of faulty logic/control boards
- Advanced diagnostics of photovoltaic systems
- Restoration of inverter functionality and communication
💡 Key Advantages
- Restores full inverter control and operation
- Improves system stability and reliability
- Reduces downtime and maintenance costs
- Cost-effective alternative to full inverter replacement
📌 Summary
The ABB Aurora TRIO 27.6 kW Logic Control Board is the core control unit of the inverter, responsible for:
✔ Managing all operational and safety functions
✔ Controlling energy conversion and grid synchronization
✔ Handling communication and diagnostics
👉 A mission-critical component for ensuring high performance, reliability, and continuous operation of photovoltaic systems.

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🔒 Warranty Terms and Conditions
By placing an order, you acknowledge and agree to the following warranty policy:
✅ 1-Year Warranty for Inverters
- All solar inverter units come with a 1-year warranty from the date of purchase.
- Each unit is fully inspected and tested before shipment to ensure proper functionality.
🔧 What the Warranty Covers
- The warranty covers defects and malfunctions that occur during standard operation.
- This includes the inverter as a whole and its internal components and circuit boards.
- If any issue arises within the warranty period, we will repair or replace the defective part or product, in line with our warranty policy.
🛠 Warranty for Separate Components
- For individual internal circuit boards, components, and repair kits ordered separately, a 6-month warranty applies from the date of purchase.
- Within this period, any functional failure will result in a free replacement as per our warranty terms.
⚠️ What the Warranty Does Not Cover
- The warranty does not apply in the following cases
- Improper installation by the customer or third parties
- Network overvoltage
- Lightning strikes or other environmental/external damage
❗ Please ensure correct installation by a qualified technician. Improper connection or handling voids the warranty.