There are many different makes of pressure controls. Designs may vary but the principle of operation is basically the same: single pressure models respond to…
Prolonged operation at high discharge pressures and temperatures, excessive motor starting, fluctuating voltage conditions, shortage of refrigerant charge and shortage of oil in the compressor…
Scaling Any type of water cooled condenser is prone to scaling of the interior surfaces of the water tubing. The rate at which the scale…
Like low side purging, the practice of purging from the high side is also unacceptable and must be discontinued. When it is certain that non-condensables…
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…
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:…