The causes of water leakage in the indoor unit of air conditioner are as follows:
1. Improper installation of fuselage:
The indoor unit is tilted, and the pipeline crossing direction is too high.
2. Bad drainage pipe:
The drain pipe is loose or bent into waves, resulting in poor drainage.
3. Dew on the pipeline:
Because the insulation material on the pipeline is too poor or too thin, when the refrigerant in the pipeline passes through, it will cause condensation.
4. Water dripping from outdoor heat exchanger:
1) The heat exchanger is covered with dust, resulting in uneven heat exchange temperature, and water droplets will be generated in the middle of the heat exchanger, and the water droplets falling outside the water tray will drip indoors.
2) Insufficient refrigerant in the air conditioning system causes the indoor unit to freeze, and the water droplets formed by melting ice will not directly drip into the water tray.
When the indoor unit leaks water, self-inspection can be carried out according to the above situation. It would be better if you could handle it yourself. If you can't solve it by yourself, please ask professional and technical personnel to deal with it in time.
Fault 2: fluorine leaks, but the air conditioner leaks fluorine for no reason.
When the air conditioner is short of fluorine, detecting the leakage point is the primary work of leakage maintenance. Today, we will introduce five commonly used leak detection methods, namely fluorescence leak detection method, soapy water leak detection method, halogen lamp leak detection method and electronic leak detection method. ?
1. Fluorescence leak detection
That is, the principle that the fluorescent leak detector will emit bright yellow-green light when irradiated by the ultraviolet/blue light leak detector is used. Fluid leakage in various systems can be detected. However, the PAG lubricating oil originally used in R 134a has poor compatibility with R 134a, and the fluorescent leak detector loses its use value because it is difficult to find oil traces at the leak.
2. Soap water leakage detection
That is, nitrogen with a pressure of 0.98- 1.96Mpa is filled into the system, and then soapy water is coated on all parts of the system, and the bubbling place is the leakage point. This method is the most commonly used leak detection method in roadside repair shops recently, but people have limited arms and limited field of vision, and many times they can't see the leak at all.
3. Halogen lamp leakage detection
After the leak detection lamp is lit, the air pipe on the hand-held halogen lamp immediately approaches the pipeline of the refrigeration system. When the pipeline leaks, the flame color will turn purple-blue. Using this method to detect leakage, there is an open flame, which is not only dangerous, but also the combination of open flame and refrigerant will produce harmful gas, so it is difficult to accurately locate the leakage point.
4. Electronic leak detection
That is, move the probe of the leak detector to the position where it may leak. If the leak detector gives an alarm, it means there is a leak here. Electronic leak detector is easy to be damaged, complicated to maintain, and easily influenced by environmental chemicals such as gasoline and waste gas, so it is impossible to accurately locate the leak point. ?
5. Sectional pressure maintenance inspection
That is, a special joint fixture is made, and then each equipment and pipeline are tested separately. This is a relatively reliable leak detection method. In the case of multiple devices and pipelines, according to the causes of component leakage and the vehicle condition, the inspection is carried out in an orderly manner according to the principle of focusing first and then general, which greatly improves the efficiency of maintenance work. Four self-inspection methods of fluorine leakage in air conditioning maintenance;
First, touch the condensing louver fan behind the air conditioner. If the temperature is not cold or there is no heat, the compressor is still working, indicating that fluorine has been used up.
At first glance, the thermostat is in a cooling state, so the set temperature is 6℃ to 8℃ lower than the room temperature. After running for 15 minutes, the hydraulic pipe (i.e. thin copper pipe) of the indoor machine should be free from frost, otherwise the machine will have a fluorine leakage fault. Whether there is oil pollution on the copper pipe joint, if there is oil pollution, it also means that there is fluorine leakage.
"Ear Listening" found that the compressor has been working since it was started, and there was no vibration when it stopped. The natural vibration of the compressor is louder than when it was newly bought, which may be caused by fluorine leakage.
"Temperature measurement" Find a thermometer near the cold air outlet to see if the temperature indicated by the instrument is 6℃ to 8℃ lower than the room temperature. If it is lower than this temperature or 5℃, it is almost the same as room temperature, and the compressor is still working, which proves that fluorine has escaped.
Fault 3: I am most afraid of encountering air conditioning and not heating in winter.
1, improper use
After a long time, the air conditioner failed to clean the filter screen in time, and the internal air circulation was blocked, which would affect the heating effect of the air conditioner to some extent.
Excessive dirt on evaporator and condenser will also reduce the heat transfer effect, resulting in a decrease in heating capacity and an increase in power consumption; The heating temperature is set too low.
However, the doors and holes of air-conditioned rooms are not blocked, or the doors are often opened, which leads to the loss of indoor heat, which will inadvertently cause air-conditioning heating weakness.
2. Environmental factors
Heating and cooling air conditioners are divided into three types: heat pump type, heat pump assisted electric heating type and electric heating type. In the case of equal heating capacity, the first two kinds of electricity consumption is about half less than that of the third kind. Considering the power supply capacity and electricity consumption, families generally choose the first two air conditioners (but pay attention to their conditions of use, the first two are only applicable to the environment above -5℃, obviously not applicable to the northern region).
It is normal that the ambient temperature of heat pump air conditioner is too low, and the energy efficiency ratio of air conditioner is also reduced, and the heating effect is not ideal in colder winter. For the heat pump air conditioner without automatic defrosting, the lowest ambient temperature used; 5℃ above zero, below which there is no heating or the effect is very poor. This is because the frost on the external heat exchanger hinders the air flow and can no longer absorb heat from the outside. For the heat pump air conditioner with automatic defrosting, the lowest ambient temperature it uses is also -5℃, below which it cannot effectively heat.
3, refrigeration cycle system, control system failure
1. Insufficient refrigerant.
The reason of coolant leakage or insufficient, at this time, we can simply carry out self-inspection to identify whether there is fluorine leakage.
2. Four-way valve cross gas.
The heat pump air conditioner switches the cooling and heating states through a four-way valve. If the four-way valve is cross gas, some refrigerants that should participate in heat exchange will directly flow back to the air return pipe from the compressor outlet pipe at the four-way valve, resulting in the decrease of refrigerants participating in heat exchange and the decrease of heat exchange efficiency, resulting in insufficient heating capacity.
3. The check valve (also called check valve) leaks.
When the one-way valve leaks, the pressure difference between high and low pressure in the refrigeration system decreases, the temperature of the outdoor heat exchanger increases, and the heat obtained from the outside decreases, resulting in insufficient heating capacity. When the air conditioning refrigeration is normal and the heating capacity is insufficient, by detecting the pressure when the system is running, it will be found that the pressure on the low pressure side rises and the pressure difference between high and low pressure drops.