Do not turn the air conditioner should first check what? (1) Power supply has power, whether the power failure; (2) the power cord is in good contact; (3) whether the remote control batteries are charged, such as low battery, signal transmission is weak, the indoor unit is not easy to receive the receiver; (4) remote control distance is too far away, the more severe signal attenuation, the indoor unit is not easy to receive the receiver. Hanyang How much air conditioning repair air conditioning air conditioning does not start proportion of the fault does not start in the actual repair work in the station is great, it is usually of the following reasons: * Air conditioning is not energized. * Power fuse or knife is disconnected. * Power supply voltage is higher than 242V or lower than 198V. Air conditioning refrigeration air conditioning refrigeration means no cool air is discharged to the air conditioning cooling state operation, summed up in the following reasons: (1) the compressor not working; (2) the system without refrigerants; (3) System blockage; (4) the machine is not running; (5) or the four-way valve train air compressor; (6) the outdoor temperature is above 43 ℃; air conditioning is not heating based on maintenance experience, causing the air conditioning is not heating, mainly in the following Cause aspects: (1) the compressor does not work; (2) the lack of fluoride serious system; (3) the fan is not running; (4) did not change to a four-way valve; (5) the outdoor temperature is below -7 ℃; improper (6) user operations; air-conditioning maintenance air conditioner during dehumidification, why sometimes the wind speed can not be adjusted? In the dehumidifier, when the indoor temperature and the set temperature temperature is less than 2 ℃ (different models may vary), air conditioners operate at low wind speed, regardless of wind speed conditions. How should multi-photocatalyst maintenance to extend the use of time? The main components of multi-photocatalyst is titanium oxide, activated carbon, ceramic fibers, advanced pulp. It can effectively remove the contaminating gases room. Multiple photocatalyst every six months to six hours in the sun, can be regenerated, serious air pollution room sun once every three months. Under normal circumstances, diversified photocatalyst life of 715 years. Wuhan Zi Yu refrigeration equipment maintenance department: #