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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Learning Objectives
• Identifying problems • Common issues • Pinpointing issues • Routine maintenance
Specs
| Course Level | Intermediate |
| Languages | English |
| Compatibility | Audio, Video |
| Based on: | Industry Standards and Best Practices |
Key Questions
Why is it important to keep operating and maintenance logs for refrigeration systems?
When a problem arises, these logs can help pinpoint when a problem first appeared and reveal all of its effects. They also help ensure inspection and maintenance activities are performed regularly.
What kinds of troubleshooting tools are available?
Equipment manuals, wiring and control schematics, operations and maintenance logs, and system diagnostic charts can all help.
If the compressor won’t start and there is no “hum,” what does this mean?
Power might not be getting to the motor or starter, or a control circuit might be open.
If the compressor won’t start but the motor hums, what could be the problem?
The compressor might be seized, the motor might be shorted, there could be a power supply problem, or the compressor might not have unloaded.
If the compressor starts but cuts out right away, or if it starts and stops continuously, what does this mean?
There are many possible reasons for this, including a low load, oversized system, faulty thermostat, plugged filter, or low refrigerant charge, among others.
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.
Course Applies To
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