Summary and analysis of 11 cases of air-conditioning water leakage

Cause Analysis: The newly installed air-conditioning room machine is leaking. After the machine is turned on and checked, it is found that after running for half an hour, the surface of the external drainage pipe about 2 meters long in the interior part is covered with water droplets. The office building is close to the river, and the environment humidity is very high, the Room is obviously larger and less enclosed, which leads to a lot of condensed water discharged from the inner side of the air conditioner. The Air condenses on the outer wall of the external drainage pipe because the external drainage pipe is only wrapped with a thin layer of tape.
Solution: Add a thermal insulation sponge on the outer wall of the external drainage pipe and re-wrap it. In the south humidity big area, the heat insulation thermal insulation sponge wrap must be in place. Case 8, drainage pipe broken leakage failure
phenomenon: internal machine leakage, start a period of time indoor machine has a large amount of water discharge, but outdoor drainage pipe did not condensate water discharge.
 Cause Analysis: The main cause of water leakage is that the drain pipe and accessories connected with the water plate are damaged during installation or are bitten by mice during use.
Solution: replace the damaged drainage pipe, check whether there is a mechanism causing the damaged drainage pipe again and take appropriate protective measures.
Case 9, the system caused by fluoride leakage failure
phenomenon: air-conditioning operation for a period of time after the air-conditioning leakage, evaporator fin frosting or icing phenomenon.
Cause Analysis: The user reported that the internal engine was leaking, and after 10 minutes of on-site operation, found that the internal engine wind wheel began to blow water, the refrigeration mode continued to operate for more than 20 minutes, and found that there was a slight frost and ice on the fins near the input pipe of the evaporator, measuring System pressure with pressure gauge, the system pressure is very low 3KG, you can judge the system serious lack of fluoride.
Solution: Check the leak point, found that the connection pipe and low-pressure valve body connection misalignment lead to nut lock position leakage fluorine phenomenon, re-connect and lock, re-evacuation, add refrigerant after normal test machine.
 Case 10, evaporator half leakage failure
phenomenon: Air Conditioning operation for a period of time after the air conditioning leakage.
Cause Analysis: After running for a period of time, the air conditioner leaked water. After 20 minutes of running, it was found that the air conditioner began to blow water. After opening the panel frame, it was found that the evaporator had several long U Tube Fins, which were very cold and had a lot of condensed water, the other evaporator fins were not obviously cool; the system was suspected to be deficient in fluorine, the system pressure was measured with a pressure gauge and the system pressure was normal; after a period of time, it was found that the long u-tube fins began to hang a lot of water and put their hands on the air outlet, it is found that the temperature difference between the fins of the two-stream U Tube is large, which can be used to judge the half-block of the evaporator and cause the deviation of the refrigerant When the evaporator is half blocked, the temperature of the Long U Tube Fin with large flow of snow species is lower, and the temperature of the Long U Tube Fin with small flow of snow species is higher, resulting in a large temperature difference between the two flow paths, the Long U Tube Fin with large flow of snow seeds condenses a large amount of condensed water and blows out with the wind.
Solution: Consult with the user after the replacement of the evaporator troubleshooting, for welding or semi-blocking system caused by partial flow heat exchanger condensation caused by the performance of a good distinction: the entire duct is full of fine water droplets, at the same time, water droplets can also be seen on the turbine blades.
Case 11, embedded air-conditioning leakage fault
phenomenon: internal leakage, running lights flashing.
CAUSE ANALYSIS: After inspection, the water directly overflows from the water disc, check the drainage pipe drainage, found that the water is very small preliminary judgment for drainage pump drainage is not enough, replacement of drainage pump test machine is normal. Solution: replace the drainage pump. The drainage method of the embedded machine is different from that of the split machine, which is natural drainage, while the embedded machine relies on the drainage pump.