As an engineering equipment, each part of the HVAC system will naturally have its own common faults after a few years of use. For example, common faults of horizontal fan coil units are leakage, dust accumulation, looseness, and noise.
1. The fan rotates, but the air volume is small or does not leave the wind
(1) Improper setting of air supply gear: adjust to appropriate gear
(2) Excessive dust accumulation on the filter screen: clean
(3) Excessive dust accumulation between coil fins: clean
(4) Low voltage: find out the reason
(5) Fan reversal: change the wiring sequence
2. The blown wind is not cold (hot) enough
(1) Improper setting of temperature gear: adjust to the appropriate gear
(2) There is air in the coil: open the coil vent valve to discharge it
(3) Abnormal water supply temperature: check the cold and heat sources
(4) Insufficient water supply: open large water valve or increase branch pipe diameter
(5) Oxidation of coil fins: replace the coil
3. The vibration and noise of fan coil unit are too large
(1) poor lubrication or damage of fan bearings: add lubricating oil or replace it
(2) Too much dust or damage to fan blades: clean or replace
(3) Friction between fan impeller and casing: eliminate friction or replace fan
(4) The air outlet is not soft connected with the external pipeline or air supply outlet: use soft connection
(5) The coil pipe and drip tray are not connected with the water supply return pipe and drain pipe in a soft way: use a soft connection.
(6) The fan coil unit runs in high gear: it is adjusted to medium and low gear
(7) Loose connectors for fixing fans: tighten them
(8) Loose louver of air supply outlet: tighten
It is difficult to completely avoid engineering equipment failures, and you can only rely on maintenance to extend the time, so proper regular maintenance can help you reduce the frequency of common faults of fan coil units.
