Mitsumi electronic 55K Replacement of parts, Cooling fan, Smoothing capacitor in main circuit

PROTECTIVE FUNCTIONS

5.3.7 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 failure of the inverter. For preventive maintenance, the parts must be changed 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

Part Name	Standard Replacement Interval	Description
Cooling fan	2 to 3 years	Change (as required)
Smoothing capacitor in main circuit	10 years	Change (as required)
Smoothing capacitor on control board	10 years	Change the board (as required)
Relays		Change as required

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

(1) Cooling fan

The cooling fan cools heat-generating parts such as the main circuit semiconductor devices. The life of the cooling fan bearing is usually 10,000 to 35,000 hours. Hence, the cooling fan must be changed 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.

#Removal

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

Fan cover

Fan

Fan connectors

2)	Disconnect the fan connector(s).
3)	Remove the fan.
# Reinstallation
1)	After confirming the orientation of the fan, reinstall the fan so that the
	arrow on the left of "AIR FLOW" faces up.
		AIR FLOW	<Example: FR-F540-5.5K>

<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.

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