| This module provides the reader with the necessary information to successfully diagnose air conditioning and refrigeration system problems. Systematic troubleshooting and diagnostics of airflow problems, refrigerant cycle malfunctions, suction and liquid line restrictions, oil logged evaporator, undercharge, overcharge, compressor inefficiencies, dirty condenser, air in the system, restricted metering device, and low and high condenser entering air temperatures are detailed.
Systematic diagnosis of the above-listed problems using service checklists to assist the service technician to quickly and efficiently troubleshoot a system is explained.
Basic and advanced leak detection covering the following six classes of leaks are detailed:
- Standing leaks
- Pressure dependant leaks
- Temperature dependant leaks
- Vibration dependant leaks
- Combination dependant leaks
- Cumulative micro leaks.
Testing procedures for evaporator leaks, condenser leaks, suction and liquid line leaks are all thoroughly explained. Advanced leak detection and modern leak detectors are also included and explained in detail.
System evacuation, deep vacuums, micron gauges and scales, vacuum pumps, vacuum manifolds, system pressure drops, vacuum breaker valves, and gas ballasts are all explained as well as illustrated.
System cleanout procedure after a compressor burnout using suction and liquid line filters and associated graphs are included. Combination acid and moisture test kits are also a part of this module. |
