First discharge the refrigerant in the system.
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Then remove the old sensor, install the new sensor, and then the system leak detection, if there is leakage, processing, until no leakage, ensure that the system does not leak, re refrigerant can be charged, the air conditioning refrigeration pipeline refrigerant recovery or discharge (according to the position of the pressure sensor to determine), the original pressure sensor welding down, replace the new.
Pressure sensor is one of the most commonly used sensors in industrial practice, which is widely used in various industrial automatic control environments.
We can directly open the air conditioning main control board, and then most air conditioners have two sensors, one is the pipeline, and the other is the environment. So we can pull the plug directly, and then put on a new fixed on it.