Emheater EM12 Series, Руководство пользователя

Страница: 17 / 166

2. Product Information EM12 User’s Manual
12
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.
2.7.2 Regular inspection
Please regularly check frequency inverter, especially for the difficult checking place of 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.
5. Check if the terminals have arcing mark.
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.)
2.7.3 Wearing parts replacement
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, electrostatic capacitance and insulation resistance
measurement.
2.7.4 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;
2. Long-term storage can lead to the degradation of electrolytic capacitors, and must ensure to power on for once
within 2 years. And the power-on time is at least 5 hours. The input voltage must slowly rise to the rating by
using the voltage regulator.
2.8 Warranty Items
1. Warranty only refers to frequency inverter.
2. Under normal use, if there is any failure or damage, our company is responsible for the warranty within 12
months. (Leave factory date is subjected to the S/N on the frequency inverter nameplate or the contract). When
over 12 months, reasonable maintenance fee will be charged;
3. During 12 months, if the following situation happens, certain maintenance fee will be charged;
a) The users don’t follow the manual stated makes the frequency inverter damaged;
b) The damage caused by fire, flood and abnormal voltage;