PROTECTIVE FUNCTIONS
160
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 structural or physical
characteristics, leading to reduced performance or failure of the inverter. For preventive
maintenance, the parts must be changed periodically.
Part Name Standard Replacement Interval Description
Cooling fan 2 to 3 years Change (as required)
Smoothing capacitor
in main circuit
5 years Change (as required)
Smoothing capacitor
on control board
5 years Change the board (as required).
Note: For part replacement, contact the nearest Mitsubishi FA center.
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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.
Inverter Model No. Fan Type
FR-E520-0.75KN MMF-04C24DS BKO-CA1382H01
FR-E520-1.5KN, 2.2KN, 3.7KN MMF-06D24DS BKO-C2416H07
FR-E520-5.5KN, 7.5KN MMF-06D24ES BKO-CA1027H08
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Removal
1) Remove the wiring cover. (Refer to page 7.)
2) Unplug the fan connector.
The cooling fan is plugged into the cooling fan
connector beside the inverter terminal block.
Unplug the connector and separate the inverter
from the cooling fan.
3) Remove the cooling fan cover.
Push the cover in the direction of arrow and
pull it down.
4) Remove the cooling fan and cooling fan cover.
The cooling fan is secured by the fixing
catches.
Disengage the fixing catches to remove the
cooling fan and cooling fan cover.
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