Category: Service Procedures
Sometimes the terminals on a single-phase compressor are not marked or are hard to identify. The terminals can be identified using a VOM/DMM to measure…
Start thermistors are used to provide additional starting torque for PSC compressors. The start thermistor is a temperature sensitive device whose electrical resistance changes as…
The motor start relay is used to remove the starting capacitor from the motor starting circuit when the motor reaches about 75 to 80 percent…
Run and start circuits on single-phase compressor motors use capacitors which affect the wattage, amperage draw, torque, speed, and efficiency o f the motor. Figure…
Always be sure that the electric power source matches the motor power requirements. Check operating voltage, frequency, and phase. External field wiring to a motor…
Both single-phase and three-phase motors are used in residential and light commercial system compressors. Permanent split capacitor (P SC ) and capacitor start-capacitor run (C…
Grounded, Open, or Shorted Motor Hermetic motors are rugged and reliable but they can fail in several ways. A broken wire in a motor winding…