Some readers are asking how to judge thelack of air-conditioning refrigerant, in fact, this question is not an accurateanswer, but we summarized the common phenomenon of air-conditioning fluorinedeficiency, hope to help you.

1. windpipe(rough pipe) valve is dry. There is no noticeable cold sensation when touchedwith the hand. The reason is that the temperature of the valve is higher thanthe leakage temperature of the outdoor air due to the excessive increase of therefrigerant.

2. frosting of liquid pipe (Pipette)valve. The reason is that the lack of fluorine causes the pressure in theliquid tube to drop, the boiling point to drop, so that the valve temperatureis below freezing point.

3. open the indoor unit panel, remove thefilter screen, you can find part of the evaporator condensation or frosting.Because of the lack of refrigerant, only part of the evaporator boiling heat,so that the corresponding reduction of the cooling area.

4. Outdoor exhaust doesn't feel hot. Thereason is that the insufficient refrigerant causes the condensation pressure,the condensation temperature to reduce, the exhaust air temperature alsoreduces.

5. The drain hose drains intermittently ornot at all. The reason is that the evaporator cooling area is reduced,condensation area is also reduced, condensation water reduced.

6．the outdoor machine gas, the liquid valve has the oil pollution, hasthe oil pollution to have the leak. The reason is that the refrigerant and thefreezing oil have certain mutual solubility, fluorine from the leakage pointescape into the atmosphere, and the oil adhesion around the leakage point.

7．Measure the working current of the air conditioner is less than therated current. The reason is the lack of refrigerant and reduce the compressorworkload, the current drop.

8. The pressure measured from thefluorine-filled mouth of the outdoor machine is less than 0.45 MPA. The reasonis that the lack of refrigerant led to a reduction in the evaporation pressure.

In addition, the following methods can beused to aid judgment:

1. Try: Theair conditioning on for a period of time after the wind blowing on the bodyfeel cool, and can quickly reach the set temperature, outdoor compressor can belike a refrigerator open for a while to stop for a while is normal.

2. Measure:use thermometer to measure the temperature difference between the inlet andoutlet of the indoor machine. The difference above 8 °C is normal. The bigger thetemperature difference is, the better the working condition of the airconditioner is.

3. see: in the boot more than 10 minutes, see outside the machine twocopper pipe, thick copper pipe should be dew, thin copper pipe should not bedew, open the indoor machine panel, should see evaporator evenly covered withcondensation water (like dew) for normal, if half is half without, probablyfluoride deficiency. If the local frosting or icing is not normal.

4. touch: If the outdoor machine in thehuman hand can touch the place, can be turned on more than 10 minutes after thehand touch. The outdoor machine has two copper valves, one with thick copperpipe and one with thin copper pipe. Two valves should be touched by handtemperature difference; thick should be smaller than the temperature, touchcooler for normal (in high temperature should also be condensed water) . Touchoutdoor machine hot air is not hot, if not very hot may lack of fluoride.