1. No proper cooling capacity is allocated according to the situation.

If the indoor unit is in the dining area, the composition of refrigeration capacity should be considered in the dining situation. If the component of cooling capacity is small, the result will inevitably be biased.

2. The indoor mechanical temperature is too high.

Use a high-precision thermometer to measure the air outlet temperature of the indoor unit and investigate the room temperature, and you will know whether the equipment is cooling normally! Just like the air outlet temperature is 14 degrees and the indoor ambient temperature is 35 degrees. In other words, the indoor temperature is high and the indoor machine performance is not good.

If the room is on the top floor, there is too much radiant heat on the wall and the somatosensory temperature is too high. During working hours, the equipment runs for one hour, waiting for retest data and comparison. The temperature drops, indicating that the outdoor temperature is too high.

3, indoor and outdoor air exceeds the allowable value, keep smooth, and the amount of refrigerant is not appropriate.

The speedometer of a small air blower is connected to the copper pipe for 30 meters, which is the limit value that will not damage the compressor. If the copper tube exceeds and works for a long time, the compressor will be damaged.

1), and the standard pipe length is 5m. When the temperature is less than or equal to 5 meters, there is no need to add additional refrigerant.

If the span is kept at 5 meters, refrigerant needs to be added.

2) When adding refrigerants, electronic scales should be used to replenish refrigerants quantitatively, relying on sensory and current measurement and experience Annie.

3) The longer the holding time, the greater the attenuation of unit cooling capacity and heat rejection.

4. It may be that the vacuum time is too short to exhaust air with the refrigerant after installation.

Regardless of the size of the equipment, the central air conditioning fan must be evacuated, and the air is discharged with the refrigerant. If you don't vacuum, the refrigeration system will be mixed with air, and the refrigeration result will naturally fall to the ground.

5. The air duct used in the indoor unit is not suitable.

The resistance of the air duct used in the indoor unit is too large, and the installation of central air conditioning will affect the air supply and ventilation of the indoor unit. The increase of the flexibility of the indoor unit will lead to the decrease of the heat transfer of the indoor unit, and the cold generated by the indoor evaporator can not communicate with the indoor air faithfully.