Replacement Of Parts - Mitsubishi FR-A500 Series Instruction Manual

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
Cooling fan
Smoothing capacitor in main circuit
Smoothing capacitor on control board
Relays
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.
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
<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
10 years
10 years

199
PROTECTIVE FUNCTIONS
Description
Change (as required)
Change (as required)
Change the board (as required)
Change as required
<Example: FR-A520-5.5K>
Fan cover
Fan
Fan connectors
5