Constant temperature protection structure, using a double-chamber vacuum insulation design to block the effects of external high and low temperatures, ensuring that the motherboard can still stably output control signals in extreme environments. Rapid fault self-diagnosis, with a built-in intelligent diagnostic system that can automatically identify faults in circuits, sensors, etc., and display fault codes. No professional testing is required, greatly improving maintenance efficiency. Wide-range compatibility, supporting multiple brands and models of air conditioners, with a preset library of multi-brand compressor drive models. models can be adapted without coding, making replacement convenient without additional debugging. Low-noise smooth operation, optimized PWM frequency modulation algorithm, reducing starting current from 12A to 6A, lowering compressor operating noise by 8 decibels, running more quietly without disturbing life. Intelligent IoT adaptation, with reserved UART communication port, supporting remote control via mobile app, energy consumption monitoring, and integration with smart home systems, unlocking a convenient control experience., Manufacturer: qj0803