How to maintain the inverters in summer?
In hot summer, as the ambient temperature increases, the failure rate of the inverter will also increase accordingly, and the theoretical life of the components will also decrease. Therefore, the maintenance and maintenance in summer is very important for the inverter to be used in a high temperature environment and reduce the failure rate. important. The following points are the possible faults of the inverter in the high temperature environment in summer and the countermeasures to solve the corresponding problems, and how to do the daily maintenance and maintenance of the inverter in summer:
1. Ensure the normal operation of the fan
Reason: If the fan of the inverter or the cabinet is not running smoothly, most of the heat will be accumulated inside and cannot be dissipated.
Countermeasure: Check whether the fan is normal, we can use the "three-step method":
1. Look and observe whether the fan power cord is off, damaged, and whether the fan blades are broken;
2. Listen and listen carefully to see if there is any abnormal sound from the fan;
3. Test, use a multimeter to measure whether the fan voltage is normal, generally about 24V; if the inspection result is not normal, it is necessary to repair or replace the fan in time.
2. Ensure that the air duct is unobstructed
Reason: When the air duct of the inverter or the control cabinet is blocked, it will affect the heat dissipation inside the machine and cause an overheating alarm. How to tell if the air duct is blocked:
A simple method can be used to test, place a thin piece of paper at the air inlet, observe whether the paper is inhaled, and then place it at the air outlet to see if the paper floats.
Countermeasures: Regularly "detox" the air duct, remove garbage, and ensure smooth air duct.
3. Maintain a suitable ambient temperature
Reason: There are many electronic devices inside the inverter, which will generate heat during operation. If the ambient temperature is too high, it is not conducive to the dissipation of internal heat.
Countermeasures: If possible, install an air conditioner. If there is no air conditioner, it is better to open the cabinet door of the control cabinet and use the fan to reduce the ambient temperature. The allowable operating ambient temperature range of the inverter is generally between -10℃～40℃, 40℃ The above needs to be derated (the allowable operating ambient temperature of ENA100 series can reach 50℃ without derating).
4. Overload
Reason: When the load of the inverter is too heavy (a small horse-drawn cart), an excessive current will be generated, which will generate a lot of heat, and sometimes the inverter will overheat alarm.
Countermeasure: reduce the load or increase the capacity of the inverter. 05Regular maintenance
5. Maintenance
Reason: In the long-term use of the inverter, it will be affected by the surrounding temperature, humidity, dust and other conditions, and the components are easy to age and corrode.
Countermeasures: The so-called preventive measures, before the arrival of high temperature days, we must maintain the inverter:
1. The general-purpose inverter should be avoided to be placed in direct sunlight, humidity, and places with water droplets, and ensure that the surrounding air does not contain excessive dust, acid, salt, corrosive and explosive gases (except for EN610 series high-protection inverters). ).
2. In order to improve the cooling effect, all inverters should be installed vertically. When two or more inverters are installed in a control cabinet, they should be installed side by side (horizontal arrangement) as much as possible. If vertical arrangement is necessary, a transverse partition should be installed between the two inverters to avoid the following The hot air from the generator enters the inverter above.
3. When the temperature is high in summer, the ventilation and heat dissipation of the inverter installation site should be strengthened. For example, adjust the distance between the inverter and surrounding obstacles: ≥125px on both sides, ≥300px on the top and bottom.
4. Regularly clean the fans and air ducts to prevent blockages; especially in the textile industry, where there is a lot of cotton wool, it should be cleaned regularly to ensure the smoothness of the cooling air path; however, it should be noted that live operation is strictly prohibited when cleaning the fan air ducts.
5. In order to prevent foreign objects from falling on the air outlet of the inverter and blocking the air duct, it is best to install a protective net cover above the air outlet of the inverter.
6. Strengthen patrol inspection, regularly check the operating status of the inverter, and measure whether the voltage and current values are within the normal range during operation.
