48 Chapter 9 Maintenance
EV3200 Door Control Inverter User Manual
9.2 Periodical Maintenance
You should check the inverter every 3 ~ 6 months according to the actual environment so as to eliminate the potential faults
and ensure the performance of the inverter and prolong its life.
Only trained personnel is allowed maintaining the drive.
Never leave metal parts like screws or pads in the drive, otherwise the drive may be damaged.
Do not reform the drive by yourself, otherwise the drive might become malfunctioned.
Note
Some IC components on the control board are sensitive to ESD, so do not touch these components.
General Inspection:
1. Check if screws of control terminals are loose. If so, tighten them with a screwdriver.
2. Check if the main circuit terminals are properly connected, and check if the connection points of mains cables or buses, or
screws are over heated.
3. Check if the power cables and control cables are damaged, especially the skin of the cables.
4. Check if the insulating tapes around the cable lugs are stripped or the connection between the cable and cable lugs is
loose.
5. Before the insulation test of the motor, the motor must be disconnected from the inverter. Otherwise, the inverter might be
damaged.
Note
Dielectric test of the inverter has already been done in the factory. It is not necessary for the user to do dielectric test again in order to
avoid potential damage of its internal components.
9.3 Replacing Weary Parts
Components that are easily damaged mainly include electrolyte capacitors of filters. Their lifetime depends largely on their
application environment and maintenance.
Normally, lifetime of electrolyte capacitor is: 40,000 ~ 50,000 hours.
You can decide the time when the components should be replaced according to their life and the inverter's total service time.
Abnormal components found during checking should be replaced immediately.
The model and parameters of the new component should be the same as or very similar to the old component.
Note
The inverter may be damaged if the new component's model and parameters are different from those of the exchanged component.
Possible cause of damages of electrolyte capacitor: high ambient temperature, aging of electrolyte and big pulse current.
Criteria: Check if over-current or over-voltage failures occur frequently during inverter startup with load, or if there is any
leakage of liquids, or if the safety valve protrudes. Measure static capacitance and insulation resistance.
