Why does H2 always appear in bioenergy air?

When the ambient temperature is too low or the working medium is lacking, the heat collected by the working medium at the evaporator will be reduced and the expansion will be insufficient, resulting in low evaporator pressure and reduced heating capacity of the heat pump. If you work for a long time, it is easy to cause the compressor temperature to be too high, so it is necessary to carry out low-voltage protection. Check the pressure of the working medium of the device. If it is lower than the pre-charging pressure, it means that the working medium is insufficient and can be replenished in time. If the ambient temperature is too low, there is no way to solve it, so you can only buy other models or brands of products with automatic cream function.