Troubleshooting Cooling Systems
Several conditions can cause a cooling system to sound an alarm or shut down completely. The system manufacturer should provide a troubleshooting section in the operator’s manual that includes a list of common problems, possible causes, and corrective measures. While only a qualified refrigeration technician should attempt to repair any part of the refrigeration circuit, some basic system checks can be performed by the end user to help determine the cause of the problem.
For example, a high-refrigerant-pressure shutdown usually involves water-related problems that affect the operation of the cooling system’s condenser in water-cooled units, or a dusty, dirty condenser or improper fan rotation on an air-cooled system. Conversely, low-refrigerant-pressure shutdown conditions could be attributed to low ambient air temperatures or an incorrect water/glycol mixture concentration.
The end user also can check the main power phasing to the system. Incorrect power levels can result in improper compressor or pump motor rotation, causing a safety hazard. Attempting to operate the liquid chiller below designed operating temperatures can cause a low-temperature shutdown. These conditions can be diagnosed or verified easily by non-specialized personnel.
The goal is not to eliminate the services of a certified refrigeration technician, but perhaps to minimize these calls to save both you and your service technician time.
A competent service technician will listen closely to the equipment operator to minimize the troubleshooting and repair time. If you require the services of a refrigeration technician, take the time to call around and talk with several of them to ensure that you feel comfortable with the contractor you select.
If you require service or parts for your chiller or heat exchanger, please contact Opti Temp’s service department: (231) 946-2931 or email Service@OptiTemp.com.