Central Air Conditioning Repair, Maintenance, and Service

Central air conditioning is a systematic project that includes compressors (centrifugal, screw, piston, scroll, etc.), condensers (water-cooled or air-cooled), throttling devices, evaporators, refrigeration oil systems, cooling water systems, chilled water systems, water pumps, cooling towers, terminal coil fans, air handling units, as well as air supply, return air, fresh air systems, power supply and distribution, and control circuits, among others.
Hotels, inns, hospitals, office buildings, factories, and leisure and entertainment venues generally use models such as water-cooled chillers (boiler heating), air-cooled heat pump chillers, or lithium bromide absorption units. For a central air conditioning project to achieve both effectiveness and energy efficiency, selecting the right brand of the main unit is crucial. Additionally, the design and installation of the central air conditioning system are equally important. It is essential to hire professionals or construction teams, as many projects suffer from quality issues and poor air conditioning performance due to unreasonable design and non-standard construction. Regular maintenance of the central air conditioning system is particularly important, though some organizations neglect it when the units are functioning. Once a malfunction causes the entire central air conditioning system to fail, it can result in significant losses and impacts. Regular maintenance can eliminate faults, reduce accidents, lower operating costs, extend equipment lifespan, and ensure normal operational sequences. Maintenance and repair of central air conditioning equipment and systems is a highly specialized industry. Practitioners must possess HVAC technology, air conditioning refrigeration principles, electronic circuit principles, and qualifications in water and electrical installation and repair, along with extensive work experience as all-around technicians. This ensures that your central air conditioning system operates efficiently, energy-saving, and normally. Hiring unprofessional and unqualified "freelancers" for repairs or maintenance not only fails to guarantee repair quality but may also exacerbate faults, leading to severe consequences. Kerry Electromechanical is a professional technical service department with all relevant qualifications and licenses. Since 1988, we have collaborated long-term with large air conditioning and refrigeration companies in Hong Kong, Macau, Taiwan, and both domestic and international markets (national first-class enterprises), engaging in the installation, construction, repair, and maintenance of central air conditioning equipment. Through continuous learning and research, we have accumulated rich work experience and robust professional skills. Over the years, we have established good cooperative relationships with international and domestic brands of central air conditioning equipment manufacturers, such as Carrier, York, McQuay, Trane, Hitachi, DunAn, Kingair,王牌, Gree, Haier, Tongfang, etc., providing genuine spare parts to customers at favorable prices. With comprehensive central air conditioning technology, complete specialized tools for inspection and maintenance, and a service philosophy based on integrity and customer first, we offer fast and scientific professional services. For central air conditioning repair and maintenance, choose professionals! We welcome technical exchanges with peers and enthusiastically provide relevant technical consultations.
The necessity of central air conditioning maintenance:
To ensure that central air conditioning equipment effectively performs its function, operating efficiently, safely, and energy-saving, daily maintenance is very important. Regular maintenance can eliminate faults, reduce malfunctions, lower operating costs, extend equipment lifespan, and ensure normal operational sequences.
After the system has been running for a period, compressor vibrations can cause pipe joints to loosen or welds to crack, leading to refrigerant and refrigeration oil leaks. Minor leaks may reduce cooling efficiency and trigger low-pressure alarms. In severe cases, the compressor may not receive adequate cooling and lubrication, resulting in overheating, scoring, and burnout.
After the initial break-in period, due to mutual wear between mechanical moving parts, impurities from wear deposit in the lubricating oil, reducing its lubricating effect. Long-term use can exacerbate wear or scoring of moving parts, eventually leading to compressor burnout.
After the air system has been running for a while, dust accumulates on the filter, increasing air resistance and reducing or blocking airflow. Reduced airflow affects the performance of fan coil units, while complete blockage renders them ineffective, disrupting normal use. Especially for air handling units, variable air volume systems, and combined air conditioners, this can easily lead to motor burnout.
Since the cooling water system is an open system, cooling water fully contacts air through the cooling tower. While being cooled, it also introduces large amounts of impurities like dust into the water system, which deposit in the cooling tower, air conditioning units, and pipes, forming sludge that reduces circulation volume and affects heat exchange.
After the chilled water system is put into use, residues such as welding slag, iron filings, mud, and oil left during installation accumulate in the system. Hard substances like welding slag and iron filings adhere to heat exchange surfaces, impairing heat transfer.

As cooling water contacts air, algae, bacteria, and other microorganisms proliferate in the cooling tower and pipes. Their remains, combined with sludge, oil, and other debris, adhere to equipment and pipes, affecting water circulation and heat exchange. Meanwhile, the formation of microorganisms and deposits promotes concentration cell corrosion and under-deposit corrosion, accelerating metal corrosion. Chilled water systems, often replenished with tap water through tanks, also experience these phenomena.
Long-term operation of central air conditioning equipment can cause wire and component aging due to heating, leading to loose or detached connections, poor contact, and phase loss. AC contactors and thermal relays may also develop faults like poor contact or open circuits.

Failure to address these issues promptly can result in compressor phase loss or three-phase current imbalance, leading to burnout.

Malfunctions of protective devices such as flow switches, high and low-pressure switches, and safety valves can also cause accidents, resulting in significant losses and impacts.

Kerry Electromechanical Engineering Co., Ltd. is a professional large-scale central air conditioning technical service department in Hangzhou with comprehensive qualifications and technology. We long-term cooperate with international and domestic large air conditioning and refrigeration equipment manufacturers to provide customers with high-quality genuine spare parts. With favorable prices and prompt service, we solve any faults and technical issues in your central air conditioning system, ensuring efficient and energy-saving operation. Your satisfaction is our service宗旨.

　　Trane Air Conditioning UC800, CH530 software programs, Trane air conditioning after-sales maintenance programs, providing computer and maintenance, binding, upgrading, and replacement of damaged parts services. All Trane air conditioning screw machines, centrifugal machines, scroll machines, and lithium bromide units using the above control systems can receive maintenance services.

Services available nationwide, including Hangzhou, Suzhou, Shanghai, Nanjing, Beijing, Hefei, Fuzhou, Guangzhou, Shenzhen, Nanning, Guilin, Kunming, Changsha, Chongqing, Chengdu, Wuhan, Zhengzhou, Taiyuan, Xi'an, Dalian, Shenyang, Harbin, Hohhot, Lanzhou, Xining, Urumqi, Lhasa, etc.

We have branches in provinces and cities such as Fujian and Zhejiang, providing nationwide door-to-door maintenance and保养 services throughout the year.