Summer is a season with frequent occurrences of inverter faults. To ensure that inverters can operate stably and reliably over the long term, the key lies in routine maintenance. To guarantee stable operation during the hot summer months and to minimize unexpected downtime due to improper maintenance or harsh operating environments, users should pay close attention to the ambient temperature where the inverter is installed, regularly clean dust from inside the inverter, and ensure that cooling airflow remains unobstructed. Increase inspection frequency, improve the surrounding environment of the inverter, motor, and wiring, check if terminal connections are tight, and ensure correct and reliable electrical connections to prevent unnecessary shutdowns.

I. Confirmation of Inverter Installation Environment
1. Ambient Temperature: Inverters typically require an ambient temperature range from -5°C to 40°C. Studies show that the failure rate of inverters increases exponentially with rising temperatures, while their lifespan decreases exponentially. An increase of 10 degrees in ambient temperature can halve the lifespan of an inverter. During summer, condensation may occur inside the inverter, significantly reducing its insulation performance and potentially causing short circuits. Enhance ventilation and cooling at the installation site.
2. Rain Protection: Summer is also the rainy season, so measures should be taken to prevent rainwater from entering the inverter (e.g., through the air outlet).
3. Corrosive Gases: If there are corrosive gases in the environment, they will not only corrode component leads and printed circuit boards but also accelerate the aging of plastic components and reduce insulation performance. For environments with acidic or alkaline gases, tailored solutions should be provided based on specific conditions.
4. Vibration and Shock: Electrical contact issues can arise when the inverter cabinet experiences mechanical vibration or shock. Therefore, after a period of operation, inspect and maintain the wiring.
II. Points to Note for Routine Inspections
1. Strengthen inspections by assigning dedicated personnel responsible for daily maintenance of inverters.
2. Record Operating Data: Create an inverter operation log to record data such as output frequency, current, voltage, etc., comparing these with standard values to identify potential faults early.
3. Ensure the ambient temperature of the inverter room is between -5°C and 35°C. Assign personnel to check the top cooling fans and whether the filter screens on the cabinet doors are blocked to ensure unobstructed cooling airflow. A method to test this is placing a standard A4 sheet against the intake grille; it should adhere firmly. Clean the filters weekly, or more frequently if the environment is dusty.
4. Environmental Monitoring: Increase ventilation during high-temperature periods. Ensure no excessive dust, acids, salts, corrosive, or explosive gases are present around the inverter. Avoid direct sunlight or proximity to heat sources. Prevent rainwater from entering the inverter.
5. Check the tightness of all electrical connections, looking for abnormal discharge marks, strange odors, discoloration, cracks, or damage.
6. The inverter room must remain clean and tidy, with regular cleaning based on actual conditions.
7. Ensure good ventilation and lighting in the inverter room, with cooling equipment (air conditioning, fans) functioning properly.
III. Maintenance Items After Inverter Shutdown
1. Use a vacuum cleaner with a plastic nozzle to clean both inside and outside the inverter cabinet to ensure no excessive dust around the device.
2. Check the ventilation and lighting of the inverter room, ensuring that ventilation equipment operates normally.
3. Verify the correctness and reliability of internal cable connections within the inverter.
4. Confirm all grounding points are secure and free from rust.
5. Every six months, retighten the nuts on internal cable connections.
6. Check the tightness of all electrical connections, looking for abnormal discharge marks, strange odors, discoloration, cracks, or damage.
7. After each maintenance session, carefully check for any overlooked screws or wires to prevent metal objects from causing short circuits in the inverter. Especially after significant changes to the electrical circuit, ensure correct and reliable connections to prevent 'backfeeding'.
Changsha Sunye Electric Co., Ltd. (established in 2010) and Shenzhen Sunye Electric Co., Ltd. (established in 2002) are national high-tech enterprises integrating R&D, manufacturing, and sales of inverters, industry-specific all-in-one machines, servo drives, and new energy products.
Sunye Electric owns independent intellectual property rights, with products certified by national authoritative institutions and holding multiple software copyrights and IP certificates. Each year, significant investment is made in research and development of new technologies and products, resulting in numerous approved patents and software copyrights. The company possesses core platform technologies such as construction hoist drivers, high-performance vector inverters, servos, and permanent magnet synchronous motor controls. Medium- and low-voltage inverters and servo drives are widely used in industries such as lifting machinery, stone processing, HVAC, machine tools, metal products, wire and cable, plastics, printing and packaging, textile and chemical fibers, building materials, metallurgy, coal mining, municipal services, and automotive manufacturing. Guided by the philosophy of “Innovation, Technology, Strength,” driven by the corporate spirit of “Unity, Progress, Pragmatism, Innovation,” and adhering to the business principle of “Sincerity and Excellence, Mutual Benefit and Coexistence,” Sunye Electric is committed to providing premium products to customers across various industries through its quality policy of “Implementing total quality management, continuous improvement, and pursuing zero defects.”
Address: Sunye Electric Industrial Park, No. 669 Xinsheng Road, High-Tech Zone, Changsha City
Tel/Fax: 0731-89932666 0731-89932688
Business Phone: 400-0755-731
Technical Support: 400-0755-731