Routine Maintenance and Inspection
‑139‑
Disconnect the optional grounding screw of VDR before any voltage resistance test; failure
to comply may result in test failure.
8.3 Replacing Quick-Wear Parts
8.3.1 Service Life of Quick-Wear Parts
Quick‑wear parts of the AC drive include the cooling fan and electrolytic capacitor.
Their lifetime is related to the operating environment and maintenance. Generally,
the service life is as follows.
Component
Service Life
[Note]
Fan
≥ 5 years
Electrolytic capacitor ≥ 5 years
Note:
The standard service life of a device is the expected lifetime when the device is used in the
following conditions. You can determine when to replace your devices based on the
actual operating time.
Ambient temperature: 40°C
Load rate: 80%
Operating rate: 24 hours per day
8.3.2 Replacing the Cooling Fan
Quantity of cooling fans
● Possible damage causes: bearing worn and blade aging.
● Diagnosis: cracks on the blade, abnormal vibration noise upon startup, and
abnormal running of fan blades
● Replacement: Press the snap‑fit joint on the fan plastic cover and pull the fan
outward. After replacement, check that the air flows upwards.
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