A compressor test evaluates the mechanical and electrical functionality of the compressor unit to diagnose operational problems or verify performance. These tests measure discharge pressure, suction pressure, amperage draw, and temperature to determine if the compressor operates within manufacturer specifications. Testing is essential for distinguishing between mechanical failure and refrigerant or electrical issues.
Test Parameters
Standard compressor testing includes discharge pressure (typically 150-400 psi), suction pressure (typically 20-100 psi), and current draw in amps. Technicians compare measured values against the system’s rating plate and performance charts. Temperature differential across the compressor should typically exceed 20°F to indicate proper operation and adequate superheat.
Diagnostic Applications
Compressor tests identify mechanical wear, internal leaks, electrical winding problems, and bearing degradation. Results guide decisions on compressor repair versus replacement. Tests also confirm proper system evacuation, oil distribution, and cycling operation before completing repairs.