Central air conditioning maintenance common faults and solutions

1, the machine dew point temperature is normal or low, indoor cooling slow cause and solution

① The air supply volume is less than the planned value, the number of air changes is less, please check whether the fan type meets the planning requirements, whether the impeller steering is correct, whether the belt is relaxed, and open the air supply valve to eliminate the lack of air volume elements.

② There is a secondary return air system, the secondary return air volume is too large, please adjust, reduce the secondary return air volume.

(3) There are many rooms in the air conditioning system and the air volume is unevenly distributed. Please adjust so that the air volume in each room is evenly distributed.

2, the system measured air volume is greater than the planned air volume causes and solutions

① The actual resistance of the system is less than the planned resistance, and the air volume of the fan is therefore increased, and the revolution of the fan can be changed when conditions are available.

② If the fan capacity is too large when planning, please turn down the air volume conditioning valve and reduce the air volume

3, the actual air volume is less than the planned air volume causes and solutions

① The actual resistance of the system is greater than the planned resistance, the fan air volume is reduced, and when conditions permit, the air duct components are improved to reduce the system resistance.

② The system is blocked, please check the possible blockage in the finishing system.

③ Air leakage in the system should be blocked.

④ The fan can not reach the planning capacity or the impeller rotation direction is wrong, the belt slips, etc., check and eliminate the factors affecting the output of the fan.

4. Causes and solutions for indoor noise greater than planning requirements

① The noise of the fan is higher than the rated value, please measure the noise of the fan, check whether the fan impeller hits the shell, whether the bearing is damaged, whether the shock absorption is outstanding, and treat the symptoms.

② Air pipe and valve, tuyere wind speed is too large, airflow noise, please adjust various valves, tuyere, reduce high wind speed.

③ The noise reduction equipment of the air duct system is not perfect, please add the number one equipment of the noise reduction bend.

5. The total air supply volume of the system is inconsistent with the total air intake volume, and the reasons for the large difference and the solution for central air conditioning maintenance

① The measurement method and accounting of air volume are incorrect, please review the measurement and accounting data.

② System air leakage or air short circuit, please check the leakage, eliminate short circuit.

6, indoor air velocity distribution uneven dead Angle causes and solutions

① Air organization planning is not considered, should be based on the measured air distribution diagram, adjust the orientation of the air supply port or add the number of air supply ports.

(2) The air volume of the air supply port is not adjusted evenly and does not meet the planned value, and the air volume of each air supply port should be adjusted to meet the planning requirements.