Routine Maintenance and Inspection
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8.1.2 List of Periodic Inspection Items
Check the items listed in the following table every one or two years, dependent on
actual use and work environment of the product. Periodic maintenance helps detect
product function deterioration and damage.
Copy this checklist and sign the "Checked" column after each inspection.
To prevent electric shock, do not perform inspection or wiring with power ON. Switch off
the power supplies of all the devices before wiring or maintenance. Wait for at least a peri‑
od of time specified on the product warning label before further operations because resid‑
ual voltage still exists after power‑off. Measure the DC voltage in the main circuit to ensure
the DC voltage is within the safe range; failure to comply may result in electric shock.
Item
Description
Solution Checked
General
Check for waste, dirt, and dust on the
surface of the AC drive.
● Check whether the controller
cabinet is powered off.
● Use a vacuum cleaner to suck
up waste and dust to prevent
contact with the AC drive..
● Wipe stubborn stains with
alcohol and wait until the
alcohol evaporates.
Cables
● Check whether the power cables and
the joining parts are discolored.
● Check whether the insulation is
ageing or cracked.
● Replace cracked cables.
● Replace damaged terminals.
Peripheral devices such
as relay and contactor
● Check devices for loose connection
and unusual noise during operation.
● Check peripheral devices for short
circuit, water stains, dilation, and
cracks.
Replace abnormal peripheral
devices.
Ventilation
● Check whether the air duct and
heatsink are clogged.
● Check whether the fan is damaged.
● Clean the air duct.
● Replace the fan.
Control circuit
● Check control elements for loose
contact.
● Check for loose terminal screws.
● Check control cables for cracked
insulation.
● Clear unwanted objects on the
surface of control cables and
terminals.
● Replace damaged or corroded
control cables.
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