When the compressor is in the cooling system of exploitation by suction and high pressure side are nearly the same, the valves can be bad. Ammeter will tell you if the electric drive makes the work for which it is designed. Without proper compression in the compressor, the current reading is very low. The problem may be piston not to escalate. When the compressor is operating normally, it should draw amperage close its nominal amount on the data plate. The suction line should be cool to the touch and sweating. This cool gas is needed for efficient cooling compressor windings. A small liquid line should be warm to the touch, not hot. If the liquid line very hot when in cooling mode, there is a problem with the device. Remember, refrigeration and air conditioning equipment, have design temperatures and conditions. In various parts of the world, there are different designs of the equipment. In a dry room in the suction line may not sweat. If the device is designed to achieve 74 degrees F. the air-conditioned room at a temperature of 95 degrees Fahrenheit and is checked on the day, when the ambient temperature is 80 degrees Fahrenheit, equipment reaches 74 degrees F.
without any problems. Even if there was inefficient compressor with the possible valve bad, it's not easy to show that, while the unit is operated under design conditions. In such conditions, as evaporator be clean or condenser coil blocked with grass affect the operation of the entire system. Another thing is that I learned a long time, know that the engineer wanted equipment to do. If you don't know what he should do, and how you can repair it? As a technician, you will see many application refrigeration theory, from food processing in industrial manufacturing. That is why it is important that you know that the block should do before you attempt to make repairs.
Expansion valves