Purpose of Training

Modern refrigeration equipment requires precise diagnostic procedures to efficiently and correctly troubleshoot and service these systems. It is no longer an acceptable practice to rely on rules of thumb.

Diagnosing mechanical problems within a refrigeration system is one of the most common yet challenging tasks performed by a service technician. Air conditioning system problems mainly fall into two categories: air flow problems and refrigerant cycle problems. Both of these types of problems are covered in this course.

This course is designed to provide the attendee with a solid foundation in mechanical refrigeration diagnostic and troubleshooting procedures.

Course Content

Training Manual

This module addresses air conditioning and refrigeration system problems and how to troubleshoot them systematically. Air conditioning system diagnostic is covered including airflow problems, refrigerant cycle problems, suction line restrictions, undercharge, overcharge, compressor inefficiencies, non-condensable in the system, and low and high condenser entering air temperatures.

Systematic troubleshooting refrigeration systems is then covered using a service checklists to assist the service technician quickly and more efficiently troubleshoot a system. System problems including undercharge, overcharge, dirty condenser, restricted liquid line, air in the system, restricted metering device, restricted air flow over the evaporator, oil logged evaporator, and inefficient compressor are covered in detail with explanations of each scenario.

Basic and advanced leak detection covering the six classes of leaks are covered.

Standing leaks, pressure dependant leaks, temperature dependant leaks, vibration dependant leaks, combination dependant leaks, and cumulative micro leaks are covered in detail in this book. Testing for evaporator leaks, condenser leaks, suction and liquid line leaks are all thoroughly covered. Advanced leak detection and modern leak detectors are then covered and explained in detail.

System evacuation using the deep vacuum method is covered in detail. Deep vacuums, micron gauges and scales, vacuum pumps, vacuum manifolds, system pressure drops, vacuum breaker valves, and gas ballasts are all explained and illustrated.

System cleanout procedure after a compressor burnout using suction and liquid line filters and associated graphs are also covered, as are combination acid and moisture test kits.