As the temperature continues to rise, in order to ensure the comfortable experience of citizens’ summer travel, the public transportation department regularly conducts systematic inspections and maintenance of the air-conditioning equipment of operating vehicles every year to ensure the stable operation of the air-conditioning system during high temperature periods.
During the inspection and maintenance process, the technicians strictly follow the standardized process: comprehensively check the air outlet of the air conditioner to ensure that there is no damage or blockage; use professional equipment to detect the cooling effect and air volume, accurately control the temperature, ensure uniform and smooth air outlet, and create a cool and clean riding environment for passengers.
Fault diagnosis and maintenance
Fault diagnosis
Poor cooling effect: Prioritize the detection of refrigerant inventory and leakage, and simultaneously check the working status of the air-conditioning compressor, condenser and evaporator to check for faults or blockage hazards.
Failure of heating function: Carefully check the heating elements, temperature sensors and circuit connections of the heating system to ensure the normal operation of each component.
Abnormal noise: Check for wear and looseness of fan blades, compressors or transmission components, and repair potential faults in a timely manner.
Maintenance operation
Refrigerant filling: If the refrigerant is insufficient, use professional equipment to accurately detect and add an appropriate amount of refrigerant.
Parts replacement: For damaged compressors, condensers, evaporators, fans and other core components, strictly select original or high-quality replacement parts for replacement.
Circuit inspection: With the help of tools such as multimeters, comprehensively detect circuit connections and component status, and repair or replace faulty circuits in a timely manner.
Daily maintenance points
Regular cleaning: Periodically clean the air conditioning filter, condenser and evaporator surface to prevent dust and debris from accumulating and affecting refrigeration efficiency.
Refrigerant monitoring: Regularly check the refrigerant pressure to ensure that it is within the standard range.
Operation status observation: Pay close attention to the sound, temperature and indicator light status when the air conditioner is running, and promptly detect and handle abnormal situations.
Safety operation specifications
Power-off operation: The bus power supply must be cut off before maintenance to eliminate the risk of electric shock.
Professional maintenance: Complex air conditioning maintenance work must be performed by professional technicians to avoid personal injury or equipment damage due to improper operation.
Special maintenance for hybrid vehicles
Compared with ordinary buses, the air conditioning maintenance process of hybrid vehicles is more sophisticated. When the technicians start the machine for maintenance, they need to focus on checking the compressor refrigerant oil level to ensure that it is at a normal level; after starting the vehicle, they use professional monitoring equipment to check for abnormal noises in the compressor and air conditioning system. Once an abnormality is found, the faulty parts will be replaced immediately to ensure the stable operation of the air conditioning system.
According to relevant regulations, from June 1 to September 30 each year, public buses must turn on the air conditioning throughout the journey. Therefore, the bus company will use systematic fault diagnosis, standardized maintenance and strict safety control to fully ensure the efficient operation of the bus air conditioning system and effectively improve the summer travel experience of citizens.
