Air conditioning fan coil system common troubleshooting

The air conditioning control regulator is installed at the wall about 1300 mm from the ground in the inner corridor area. The main functions are: manual adjustment of the local air speed of the air supply fan (generally low, medium and high), presetting the upper and lower limits of indoor temperature, etc.. Now the full application of intelligent network systems, computer terminals can be operated remotely to control the room air conditioning fan coiler unit start and stop, in addition to providing users with a comfortable living environment, but also energy-saving role in reducing consumption.

Fan coiler return air outlet (shutters) is equipped with three layers of coarse and fine filters, need to be cleaned regularly to remove dust. General quarterly program cleaning.

Fan coil system continuous operation, can not reach the preset indoor temperature when the maintenance focus:

A, temperature control regulator is faulty, check and repair or replace the temperature controller;

B, check whether the electromagnetic control valve installed in the circulating return water pipe of the fan coiler is in the open position;

C, manually open the solenoid valve, determine whether the fan coiler circulating water began to flow; observation of heating the outer wall of the water pipe warming, cooling the outer wall of the pipe with condensation; check and repair the solenoid valve mechanical or control failures, replace the damaged solenoid valve of the same type.

In the maintenance or replacement of circulating water system accessories to restore the water supply and return, there will be part of the air into the fan coil exchanger water pipe, the phenomenon of air blockage occurs, you need to manually open the table cooler bleeder valve to remove the gas from the water pipe, to promote the flow of circulating water in the exchanger pipe, to restore the function of the wind and water exchange.

In the same floor there are more than one room fan coiler can not be cooled (heating), need to check the cooling (heat) pipe network zoning supply and return trunk valve failure, maintenance of the supply and return system did not resume operation, the pipeline has a gas blockage and dirty blockage phenomenon, need to contact the engineering air-conditioning professional pipeline area to check and repair.

Fan coil air supply outlet (shutters) in the summer high temperature and high humidity environment will produce condensation phenomenon, condensation will be soaked around the air supply outlet of the decorative layer. Treatment method:

A, check the new air supplement air supply system combined fan dehumidification unit failure, such as stop working, reported to the air conditioning pipe area overhaul to restore the dehumidification unit function;

B, without affecting the use of the case, adjust the indoor preset temperature, reduce the air conditioning air supply and indoor temperature difference;

C, conditions apply for replacement of air outlet (shutter) material, such as low-conductivity wood products;

D, field dismantle the air-conditioning air supply outlet for inspection. If the outlet of the air supply pipe and the external shutter are connected by upward lead, and the bottom edge of the outlet is higher than the bottom edge of the air supply pipe, it is recommended to make a water-accumulating deflector plate to lead the condensate back into the air pipe.

Inside corridor top decorative surface in summer when found with water marks, check and repair parts are:

A, fan coil condenser water tray outlet blockage can not be normal condensate discharge, so that condensate out of the tray due to clean up the tray debris and algae dredging tray outlet, under the condition of the tray outlet can be put in the tray algae chlorine tablets, while adjusting the water tray level;

B, air conditioning fan coil circulating supply and return water pipe and valve area insulation layer is damaged, resulting in condensation phenomenon, re-replace the insulation layer, to avoid direct contact between the outer wall of the water pipe and indoor air.

Fan coil squirrel cage fan operation, vibration or dry sound, troubleshooting content:

A, fan coiler unit lifting frame loose, reinforce the lifting frame pivot point, conditions in the lifting frame pivot point to add vibration dampers or thickened elastic rubber pads, reduce the vibration noise conduction when the unit is running;

B, the squirrel cage fan blade deformation damage (fan blade with dust accumulation), replace the same type of spare parts;

C, fan motor bearing wear produced axial large-size tampering, remove the fan motor to replace the same type of bearing, replenish the lubricating grease, and in the maintenance of the operating table power test run, adjust the dynamic balance, etc., the indicators to meet the requirements before reinstalled in the original fan coil unit;

D, fan coiler unit and return air duct connection loose noise, need to break the decorative ceiling construction.