1. Turn on the air conditioner for refrigeration, and adjust the temperature to the lowest (to prevent the air conditioner from stopping working). If the indoor temperature is too low in winter, cover the temperature sensor with a hot towel, wait for 5 to 10 minutes, and close the high pressure valve after the compressor runs normally. The method is to replace the protective cap on the trachea interface with a wrench and close the high-pressure pipe valve (thin) clockwise with five hexagon nuts. Wait 1-2 minutes. When there are water drops on the pipe wall, close the low-pressure valve (coarse). The method is as above. At the same time, turn off the air conditioner and unplug the 220V power supply, so that the collection of fluorine is completed.
2. Remove the outdoor unit of air conditioner.
It takes two people to remove the outdoor unit. First, fix the middle of the outdoor unit with one end of nylon rope, and the other end is firmly fixed on the balcony. After unscrewing the lock nut of the high-pressure pipe connected with the external machine, protect the thread of the external machine connecting joint with the prepared sealant, and then cover the secondary sealing cap. Remove the control line from the outdoor unit with a screwdriver and identify the position of the wire. Then remove the fixed expansion bolt, and the air conditioner with service life exceeding 10 years. After weathering and corrosion, it is difficult to unscrew the four fixing screws with a wrench. It is also difficult to cut screws with hacksaw in high-rise buildings. The best way is for one person to hold the outdoor unit and the other person to tighten the bracket with a wrench and remove the bracket together. When demolished, the high-rise building should fasten the safety belt and step on it. If there is a strong wind, you must wear a helmet to avoid breaking the glass upstairs and hurting yourself. The wrench used should be tied to the wrist with a rope, and the user should be consulted to persuade pedestrians to avoid it, so as not to hurt pedestrians. Be careful when operating, nothing (even a nut) can fall off, otherwise the consequences will be unimaginable. There are many such lessons, and we must not be careless.
3. Air conditioning indoor unit
Loosen the lock nut connected to the indoor unit with two wrenches, then loosen the lock nut by hand and remove the control line with a screwdriver. In the control circuit of a single cooling air conditioner, there are two power lines and one protective ground line. The terminal boards are marked with a, b, l and 2. The control line and power supply of dual-purpose air conditioner are above 5 lines. If the terminal board is not marked, the control line will be equipped later. It is best to cut the control signal line at the terminal board end with pliers or guide the terminal board line with paper money. In order to avoid the wrong signal line connection during installation, the outdoor unit will not run or have uncontrollable faults.
The hanging boards of indoor machines are mostly fixed on the wall with cement nails. Cement nails are particularly hard, and it takes some skill to remove them. The method is: pry one side with a punch and put a hard object under the punch. Knocking the punch with a hammer can loosen the cement nail, which makes it easier to remove the hanging plate.
After all, this is a highly professional technical job. If you are not careful, you will not be able to use it normally, and even the machine will be damaged on the spot. So it is recommended to find a professional to do it.