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Maintenance
6.2 Periodic Inspection
Inspection
Item
Inspection Point
Solution
Checked
General
Inspect for wastes, dirt, and dust on
the surface of the AC drive.
◆
Check whether the cabinet of
the AC drive is powered off.
◆
Use a vacuum cleaner to suck
up wastes and dust to prevent
direct touching.
◆
Wipe stubborn stains with
alcohol and wait until the
alcohol evaporates.
Cables
Inspect power cables and
connections for discoloration.
Inspect wiring insulation for aging
or wear.
◆
Replace cracked cables.
◆
Replace damaged terminals.
Peripheral
devices
such as
relay and
contactor
Check whether the contactor is
loose or abnormal noise exists
during operation.
Check whether short-circuit, water
stain, expansion, or cracking occurs
on peripheral devices.
◆
Replace abnormal peripheral
devices.
Ventilation
Inspect whether ventilation and
heatsink are clogged.
Check whether the fan is damaged.
◆
Clean the ventilation.
◆
Replace the fan.
Control
circuit
Inspect for control components in
poor contact.
Inspect for loose terminal screws.
Inspect for control cables with
cracked insulation.
◆
Clear away foreign matters on
the surface of control cables
and terminals.
◆
Replace damaged or corroded
control cables.
6.3 Replacement of Wear Parts
6.3.1 Service Life of Wear Parts
The service life of fans and electrolytic DC bus capacitors is related to the operating
environment and maintenance status. The general service life is listed as follows.
Component
Service Life
[1]
Fan
≥ 5 years
Electrolytic capacitor
≥ 5 years
[1] You can determine when to replace these parts according to the actual operating
time.
█ Ambient temperature: 40ºC
█ Load rate: 80%