This condition is probably more common than faults causing low suction pressures, especially during the summer months when ambient temperatures are higher. Causes and corresponding…
Category: Refrigerator Troubleshooting
Most smaller open drive and some direct drive semi-hermetic compressors employ this type of crankshaft seal. They are often a cause of noise complaints (squeaking)…
On most compressors this will be a relatively simple task, but the procedure will differ with compressor design. The following is the procedure for a…
This is also referred to as a compressor pump test. It is carried out when the functions of the compressor suction and discharge valves are…
When a system pipework is opened to atmosphere during a replacement operation, it is possible that air will enter the system. Air contains moisture, and…
Assuming the restriction in the drier is only partial, and that a low pressure cut-out control is in circuit, the following procedure should be adopted:…
If an internal equalizing expansion valve is substituted with an external equalizing valve, an additional connection must be provided for the external equalizing capillary. The…
When this condition exists there is effectively a total blockage in the high side of the system (liquid line). The pressure in the low side…
There are a number of reasons for replacing an expansion valve: 1. Mechanical failure of the valve: possible seizure of the valve stem carriage; worn…
Some commercial evaporators are designed with series-parallel and parallel tubing circuits, which means that they have more than one refrigerant circuit. Refrigerant from a single…