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Replacement Of Parts - Mitsubishi Electric FR-A500 Instruction Manual

Transistorized inverter.
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Replacement of parts

The inverter consists of many electronic parts such as semiconductor devices.
The following parts may deteriorate with age because of their structures or physical characteristics, leading
to reduced performance or fault of the inverter. For preventive maintenance, the parts must be replaced
The part replacement guidelines for the inverter are indicated in the following table. Lamps and other short-
life parts must also be changed during periodic inspection.
Replacement Parts of the Inverter
Part Name
Cooling fan
Main circuit smoothing capacitor
On-board smoothing capacitor
* The life of electrolytic capacitor is about eight years (50000h) if used for 20 hours a day and 300 days a
year in the average yearly ambient temperature of 35 ° C (95 ° F).
Note: For part replacement, contact the nearest Mitsubishi FA center.
(1) Cooling fan
The cooling fan is used to cool heat-generating parts such as the main circuit semiconductors. The life of the
cooling fan bearing is usually 10,000 to 35,000 hours. Hence, the cooling fan must be replaced every 2 to 3
years if the inverter is run continuously. When unusual noise and/or vibration is noticed during inspection, the
cooling fan must be changed immediately.
1)Push the hooks from above and remove the fan cover.
2)Disconnect the fan connector(s).
3)Remove the fan.
1)After confirming the orientation of the fan, reinstall the fan so that the
arrow on the left of "AIR FLOW" faces up.
<Fan side face>
2)Reconnect the fan connectors.
When wiring, use care to avoid the cables being caught by the fan.
3)Reinstall the fan cover.
Standard Replacement Interval
2 to 3 years
8 years *
8 years *
Replace (as required)
Replace (as required)
Replace the board (as required)
Replace as required
Fan cover
Fan connectors
<Example: FR-A520-5.5K>


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