Air conditioning pressure switch damage will be what failure
If the short circuit, then the unit does not stop until other failures occur. The alarm group can not open the machine. The
The working principle is: high air-conditioning, low-voltage protection is to detect the pressure inside the system refrigerant pressure switch, the main role is to detect the system pressure is normal, the pressure exceeds the allowable range, the pressure switch action, and abnormal signal to the CPU , CPU processing will stop the cooling system work, and the fault displayed. The low-voltage protection detects that the return air pressure in the system is generally less than 0.05MPA. The action is to prevent the compressor from operating in the system without damaging the compressor. High-pressure protection is detected by the exhaust pressure is generally higher than the 3.5MPA switch action, the role is to prevent the system too much refrigerant and condenser heat dissipation, and damage the compressor or burst pipe.
General manufacturers will pressure switch string in the compressor circuit to protect the compressor! General machine alarm, the machine can not boot!
Usually the pressure switch is connected to the compressor power supply, if damaged, one situation is the compressor can not work, the other case the compressor will always work, even if the system pressure is too high, if the system pressure is too high, and compression Machine to continue working, then easy to damage the compressor.
