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Inspection items
The inverter is a static unit mainly consisting of semiconductor devices. Daily inspection must be performed to prevent any
fault from occurring due to the adverse effects of the operating environment, such as temperature, humidity, dust, dirt and
vibration, changes in the parts with time, service life, and other factors.
zPrecautions for maintenance and inspection
When accessing the inverter for inspection, wait for at least 10 minutes after the power supply has been switched OFF, and
then make sure that the voltage across the main circuit terminals P/+ and N/- of the inverter is not more than 30VDC using a
tester, etc. The capacitor is charged with high voltage for some time after power OFF, and it is dangerous.
If "EV" is displayed on the operation panel, turn off the 24V external power supply before inspection.
7.1 Inspection items
7.1.1 Daily inspection
Basically, check for the following faults during operation.
(1) Motor operation fault
(2) Improper installation environment
(3) Cooling system fault
(4) Abnormal vibration, abnormal noise
(5) Abnormal overheat, discoloration
7.1.2 Periodic inspection
Check the areas inaccessible during operation and requiring periodic inspection.
For a periodic inspection, contact your sales representative.
(1) Check for cooling system fault............Clean the air filter, etc.
(2) Tightening check and retightening......The screws and bolts may become loose due to vibration, temperature changes,
etc. Check and tighten them.
Tighten them according to the specified tightening torque (Refer to page 17).
(3) Check the conductors and insulating materials for corrosion and damage.
(4) Measure insulation resistance.
(5) Check and change the cooling fan and relay.
When using the safety stop function, periodic inspection is required to confirm that safety function of the safety system
operates correctly.
(For more details, refer to the Safety stop function instruction manual (BCN-A211508-004)). (Refer to the front cover of the Instruction
Manual (Basic) for how to obtain the manual.)