Why doesn't the hotel air conditioner cool?

1, freon is not enough. 2. The power supply voltage is not enough. 3. The air conditioning power is not enough. The outdoor temperature is too high. 5. If the air conditioner is not cleaned and maintained for a long time, it is easy to absorb dust and sundries, which will affect the heat dissipation performance of the machine and reduce the refrigeration effect of the air conditioner. 6. The copper wire connecting the indoor unit and the outdoor unit is too long, and the maximum allowable length of the air conditioning connecting pipe stipulates that a horse cannot exceed 8 meters at most. Suggested solution: 1, whether the air-conditioning compressor works normally, whether the fan is started, check whether the air-conditioning compressor, starting capacitor and fan are damaged, and check and eliminate them. 2. Whether the radiator of the air conditioner is dirty or blocked, causing the air conditioner to be unable to dissipate heat in time, resulting in the air conditioner suddenly not cooling. Clean the air conditioner radiator regularly. 3. Check whether the air conditioning system is short of fluorine and add fluorine to the air conditioner in time. Inspection method: Start the machine first. After the compressor of the air conditioner runs continuously for 30 minutes, touch the condensing louver fan behind the air conditioner with your hand. If the hand feels that the temperature is not cold or there is no heat, the compressor is still working, which is likely to be fluorine leakage or lack of fluorine. 4. Check whether the temperature sensor of the air conditioner is damaged and whether the remote controller and receiver are out of order. These are the reasons why the air conditioner suddenly stops cooling. Please check and eliminate them. 5. Check whether the layout is reasonable, the ventilation duct should not be too long, and the outdoor unit should be placed in a cool place to achieve the purpose of refrigeration.