Refrigeration – System Troubleshooting
Troubleshooting of any type of refrigeration unit depends, in part, on your ability to compare normal operation with that obtained from the unit being operated. Obviously for you to detect these abnormal operations, you must first know what normal operation is. This course will cover common issues in refrigeration systems and how to perform routine maintenance.
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Course Details
Learning Objectives
By the end of this course, you will be able to:
- List the steps involved during troubleshooting of a refrigeration unit or system
- Describe the following troubleshooting tools: diagnostic charts, maintenance and operations logs, and wiring schematics
- Identify possible causes for a compressor that won’t start, runs continuously, or turns on and off quickly, or a refrigeration unit that is unusually noisy
- List troubleshooting tips for walk-in units, glass door reach-in units, and single-door refrigerators
- List inspection and maintenance activities that should be performed on a regular basis and describe the records that must be kept
Specs
Frequently Asked Questions
Why is it important to keep operating and maintenance logs for refrigeration systems?
What kinds of troubleshooting tools are available?
If the compressor won’t start and there is no “hum,” what does this mean?
If the compressor won’t start but the motor hums, what could be the problem?
If the compressor starts but cuts out right away, or if it starts and stops continuously, what does this mean?
Sample Video Transcript
Some common problems with refrigeration systems include: • Compressor won’t start • Compressor starts but then stops immediately • Compressor starts and stops frequently (referred to as “short cycling”) • Compressor runs continuously • System runs but doesn’t provide adequate cooling • System is noisy • Evaporator is heavily iced • Compressor discharge temperature is high • High power consumption It is beyond the scope of this module to cover all of these problems and their possible causes. The next section will discuss some possible causes for some of the more common problems.
