To understand the circuit diagram, we must first understand the problem it solves.
Knowing the circuit diagram allows you to isolate failures rapidly.
The hum of a traditional refrigerator is a familiar sound in any household—that distinct "click" of the compressor starting, followed by a steady drone, and finally, the "click" of it shutting off. However, in modern kitchens, that sound has been replaced by a gentle, variable hum. This shift is due to the adoption of .
Likely cause: Sensor input failure. Diagnosis:
In a standard non-inverter refrigerator, the compressor acts like a light switch. It is either fully (running at full speed/peak wattage) or fully OFF .
Likely cause: IPM or MCU not sending PWM. Diagnosis using diagram:
The basic diagram remains, but new features are appearing: