Inovance MD500 Series - Replacement of Wearing Components

10. Maintenance and Inspection
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10.3 Replacement of Wearing Components
Wearing components of the AC drive include the cooling fan and bus electrolytic capacitor. Their
service life is related to the operating environment and maintenance status. Generally, the service life
is shown as follows:
Component Service Life Possible Cause Judging Criteria
Fan ≥ 5 years ● Bearing worn
● Blade aging
● Whether there is crack on the
blade
● Whether there is abnormal
vibration noise upon startup
Electrolytic
capacitor
≥ 5 years ● Input power supply in poor
quality
● High ambient temperature
● Frequent load jumping
● Electrolytic aging
● Whether there is liquid leakage.
● Whether the safe valve has
projected.
● Measure the static capacitance.
● Measure the insulation resistance.
The standard service time indicates the service time when the AC drive is used on the following
conditions:
● Ambient temperature: about 40°C on average yearly
● Load rate: below 80%
● Operating rate: below 24 hours per day
You can determine when to replace these parts according to the actual operating time.
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Number of Fans on the Drive
MD500 Model Number of Fans
MD500T18.5GB-INT 1
MD500T22GB-INT 1
MD500T30GB-INT 1
MD500T37GB-INT 1
MD500T45GB-INT 1
MD500T55GB-INT 1
MD500T75GB-INT 2
MD500T90G-INT 2
MD500T110G-INT 2
MD500T132G-INT 2
MD500T160G-INT 2