Mitsubishi Electronics FR-A500 ユーザーズマニュアル

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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

periodically.

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

Note: For part replacement, contact the nearest Mitsubishi FA center.

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.

Cooling fan

2 to 3 years

Replace (as required)

Main circuit smoothing capacitor

10 years

Replace (as required)

On-board smoothing capacitor

10 years

Replace the board (as required)

Relays



Replace as required

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1)Push the hooks from above and remove the fan cover.

2)Disconnect the fan connector(s).

3)Remove the fan.

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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.

Fan cover

Fan

Fan connectors

<Example: FR-A520-5.5K>