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…
In addition to the failure modes previously described, there are several other system-related problems that, if not corrected, can result in the mechanical failure of…
If a leak exists at the electrical terminals of a hermetic compressor (Figure SP-9-5), it cannot be repaired and the compressor must be replaced. If…
Compressors depend upon their valves and rings to provide a seal between the high-pressure and low-pressure sides of the system and the compressor. If either…
A compressor is generally considered to be seized if it hums but will not start, and draws locked rotor current for several seconds as measured…
The most common types o f compressors encountered when servicing residential and light commercial equipment are the reciprocating, rotary, and scroll-type hermetic compressors. In a…
Purpose – The compressor is the heart of the cooling system. It creates the pressure difference that causes the refrigerant flow around the system. Compressor…