Danfoss 101N0390 Electronic Unit

The Danfoss 101N0390 Electronic Unit is a high-performance 24VDC compressor controller designed specifically for Secop BD80F, BD100CN, and BD250GH.2 series compressors. As a professional-grade brushless DC motor driver, this unit offers a direct, backward-compatible upgrade for the obsolete 101N0290 and 101N0280 models. It features integrated Adaptive Energy Optimization (AEO), which dynamically adjusts motor speed between 2,500 and 4,400 RPM to match the thermal load, significantly improving system COP and reducing energy consumption. This DC starting device includes advanced communication interfaces for error logging and supports both mechanical and electronic NTC thermostats. Engineered for reliability in mobile and solar refrigeration, the 101N0390 provides robust battery protection against deep discharge and over-voltage. It eliminates the need for external fan-forced cooling while maintaining precision control over the refrigeration compressor electronic unit, ensuring stable performance in demanding HVACR applications.

• Full Backwards Compatibility: Seamlessly replaces 101N0290 and 101N0280 units without requiring wiring modifications.
• Adaptive Energy Optimization: The AEO function automatically recalculates the optimal compressor speed every 24 minutes to prevent short-cycling.
• Advanced Protection Suite: Built-in safeguards against fan over-current, compressor start failure, and thermal overload.
• Multi-Voltage Intelligence: Automatically detects 12V or 24V inputs with customizable battery cut-out thresholds.
• Tool4Cool Support: Compatible with Secop software for precise parameter monitoring and field diagnostics.

Will this unit work with my existing 12V system?
Yes, while typically used in 24VDC configurations, the 101N0390 is a dual-voltage controller that operates across a 9V to 32V range, making it suitable for both 12V and 24V mobile refrigeration setups.

How do I diagnose a compressor start failure?
A 10mA LED can be connected between the + and D terminals on this Danfoss electronic unit. The number of flashes will indicate specific faults such as a blocked rotor or battery under-voltage.

Is an external fan required for this module?
Unlike older generations, this upgraded Secop controller does not require integrated fan-forced cooling, though a 12V fan (max 5W) can still be connected to the dedicated terminals for enhanced cabinet airflow.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.