The fan coil is mainly composed of a fan, a heat exchange coil and a casing. According to the external static pressure of the fan coil machine, it can be divided into standard type and high static pressure type. According to the number of heat exchange coil rows, it can be divided into two rows and three rows. The heat exchange coil generally adopts copper tube string aluminum fins. The outer diameter of the copper tube is 10~16mm, the fin thickness is about 0.15~0.2mm, and the spacing is 2.0~3.0mm, the motor adopts capacitive 4-pole single-phase motor, three-speed speed, and the casing and condensate tray are insulated.
The working principle of the fan coil air conditioning system is to continuously circulate the indoor air through the fan coil unit, so that it is cooled or heated through the coil to maintain the required temperature and certain relative humidity of the room. The cold water or hot water used by the coil is supplied by the centralized cold source and heat source. At the same time, the fresh air after centralized treatment by the fresh air conditioning room is sent to each air-conditioned room through special fresh air ducts, to meet the sanitary requirements of air-conditioned rooms.
Compared with the centralized system, the fan coil air conditioning system has no large wind channel, only water pipes and small fresh air pipes. It has the advantages of convenient layout and installation, small building space occupation, and good individual adjustment. It is widely used in temperature, Humidity accuracy requirements are not high, the number of rooms is large, the rooms are small, and the comfort air conditioner needs to be controlled separately.

Fan noise fault performance and treatment methods:
1. For the noise caused by bearing damage, the treatment method is to replace the bearing.
2. The noise generated by the ceiling during operation is to adjust the height of the coil boom nut, or to deal with the friction between the tuyere and the ceiling keel.
3. There is noise generated by air in the pipeline. The treatment method is to exhaust the air in the pipeline in the coil exhaust valve, floor exhaust valve, and end exhaust valve.

Fan can not start or slow operating speed fault performance and processing methods:
1. If the temperature switch is damaged, use a pen to measure whether there is electricity at the input end of the temperature control switch and the output pile head of the fan. If the temperature switch is damaged, the temperature switch can be replaced or repaired.
2. Slow running speed:.
A, fan coil feel the fan surface temperature is normal.
B, manually rotate the fan blade after shutdown, feel whether the rotation is flexible, and replace the fan bearing if there is resistance.
c. If the manual disk operates normally, replace the starting capacitor.
D, measure the resistance of the motor coil, and replace the motor if it is not normal.

air conditioning effect is poor or no effect:
1. Open the exhaust valve of the coil and check whether the circulating water temperature of the system is normal.
2, check the inlet and outlet temperature:
a. The temperature difference is very small. Open the exhaust valve of the coil and check whether the water temperature is normal. If the water temperature is normal, then check whether the two-way valve is open. If the two-way valve is not open, continue to check whether the power supply of the two-way valve is normal and check whether the Y-type filter is blocked.
B. The temperature difference between the inlet and outlet is normal. Check whether the room insulation is normal, such as whether the doors and windows are closed. If the doors and windows are not closed, the air conditioner will have no effect. You should explain with the customer.
c. The temperature difference between the inlet and outlet is too large. The air volume at the air outlet is small. Check whether there is dust on the air inlet filter and check whether the fan speed is normal.

air conditioning has peculiar smell:
1. Check the fan coil and clean the air filter screen at the air inlet.
2. Check whether there is dust on the coil flake. If there is dust, implement a cleaning plan.
3. Check whether there are foreign objects, dust, water, etc. in the air duct, clean and remove peculiar smell.
4, check the water tray has no foreign body.

Air conditioning leaks:.
1. Poor drainage: a. Check whether the water-saving tray is blocked, B. Check whether the drain pipe is blocked, c. Check whether the slope of the drain pipe is reasonable.
2. The insulation layer falls off and the insulation layer is restored.
3. The exhaust valve is leaking, close the exhaust valve tightly.
4. Hoses, valves, and pipe fittings are leaking. Close the main valve and replace it.

air conditioning pipe burst pipe emergency treatment:
1, open the drain valve drainage decompression.
2. Turn off the air conditioner host, expansion tank makeup valve booster pump, and circulating pump.
3. Close the main valve in the pipe burst area.
4. Turn off the power supply in the pipe squib area.
5, endanger the elevator, turn off the elevator power, as far as possible to stop higher than the explosion pipe floor.
6. Remove important materials in time and clean up accumulated water.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures