2. Product Information
EM15 User’s Manual
12
2.5 Daily maintenance of frequency inverters
2.5.1 Daily maintenance
Due to the influence of temperature, humidity, dust and vibration, it will lead to poor heat dissipation and
component aging of frequency inverter, and results in potential failure or reducing the service life of frequency
inverter. Therefore, it is necessary to do daily and regular maintenance of the frequency inverter.
Daily check items:
1.
Check if the frequency inverter sound is normal during the running of the motor;
2.
Check if there is a vibration during the running of the motor;
3.
Check whether the installation environment of frequency inverter has changed;
4.
Check if the cooling fan of frequency inverter is working correctly, the cooling air duct is clear;
5.
Check if the frequency inverter is overheating;
6.
Make sure that the frequency inverter should always be kept in a clean state;
7.
Clear up effectively the dust on the surface of the frequency inverter, prevent the dust from entering into the
inside of the frequency inverter, especially for the metal dust;
8.
Clear up effectively the oil and dust on the cooling fan of frequency inverter.
2.5.2 Regular inspection
Please regularly check frequency inverter, especially for the difficult checking place during running.
Regular inspection items:
1.
Check the air duct and clear up regularly;
2.
Check if there are any loose screws;
3.
Check if the inverter has been corroded;
4.
Check whether the wiring terminals show signs of arcing.
Note:
When using the megger(please use the DC 500V meg ohm meter) to measure the insulation resistance, you
shall disconnect the main circuit to the frequency inverter. Do not use the insulation resistance meter to test the
control circuit. Do not to do the high voltage test (It has been done when the frequency inverter producing in
factory.)
2.5.3 Replacement of wearing parts
The vulnerable parts of frequency inverter include the cooling fan and filter electrolytic capacitor, its service life is
closely related to the using environment and maintenance status. The general service life is:
Part Name
Service Life
Fan
3 to 4 Years
Electrolytic capacitor
5 to 6 Years
The user can confirm the replace time according to the running time.
1.
Possible reasons for the damage of cooling fan: bearing wear and blade aging. Distinguish standard: Any
cracks in the fan blade, any abnormal vibration sound during the starting of frequency inverter.
2.
Possible reasons for the damage of filting electrolytic capacitor: poor quality of the input power supply, the
environment temperature is higher, the load change frequently and the electrolyte aging. Distinguish standard:
Any leakage of its liquid, if the safety valve is protruding, please test capacitor electrostatic capacitance and
insulation resistance.
2.5.4 Storage of the frequency inverter
After buying the frequency inverter, users shall pay attention to the temporary and long-term storage as following:
1.
Store the frequency inverter in the original packaging;
