Replacement Of Parts - Mitsubishi Electric FR-F500 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.
Replacement Parts of the Inverter
Part Name
Cooling fan
Smoothing capacitor in main circuit
Smoothing capacitor on control board
Relays
( 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 40,000 to 50,000 hours. Hence, the cooling fan must be changed every 5years 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) Turn the four knurled knobs fixing the cooling fan installation plate counterclockwise.
(The knobs can be turned easily using a coin, etc.)
2) Lift the installation plate and cooling fan slightly, and disconnect the fan connectors.
3) Remove the fan with the installation plate.
4) Remove the four screws fixing the cooling fan to the installation plate.
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) Connect the fan connectors
When wiring, use care to avoid catching the wires in the fan and sandwiching in the metal sections of
the cooling fan and inverter unit.
3) Insert the cooling fan installation plate into the inverter unit, and securely fix with screws.
Caution: The number of cooling fans used differs according to the inverter capacity. Depending on the
number of cooling fans used, they may be installed on two installation plates.
Standard Replacement Interval
2 to 3 years
5 years
5 years

Fan installation plate
Knourted knobs
Cooling fan
Fan connectors
Inverter unit
FR-A500L
172
PROTECTIVE FUNCTIONS
Description
Change (as required)
Change (as required)
Change the board (as required)
Change as required
<Looking from side>
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