Mitsubishi Electric FR-S500 Series Instruction Manual page 79

Precautions for maintenance and inspection
(1) Cooling fan
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 replaced immediately.
Inverter Type
FR-S520E-1.5K, 2.2K, 3.7K-NA
FR-S540E-1.5K, 2.2K, 3.7K-NA
Removal
1) Remove the front cover and wiring cover. (Refer to page 1.)
2) Unplug the fan connectors.
The cooling fan is connected to
the cooling fan connector
beside the main circuit terminal
block of the inverter.
Unplug the connector and
separate the inverter from the
cooling fan.
3) Remove the cooling fan cover.
Disengage the fixing hooks
pointed by arrows to remove the
cooling fan cover.
4) Remove the cooling fan and
cooling fan cover.
The cooling fan is secured by
the fixing hooks.
Disengage the fixing hooks to
remove the cooling fan and
cooling fan cover.
Reinstallation
1) After confirming the orientation of
the fan, reinstall the fan so that the
arrow on the left of "AIR FLOW"
faces up.
CAUTION
Installing the fan in the opposite air
flow direction
inverter life to be shorter.
2) Reinstall the fan cover to the inverter.
Run the cable through the wiring groove to prevent it from being caught
between the chassis and cover.
3) Reconnect the cable to the connector. (Refer to "Removal" for the position of
the connector.)
4) Reinstall the wiring cover.
can cause the
Fan Type
MMF-06D24DS BKO-C2461H07
MMF-06D24ES-FC4 BKO-CA1027H09
AIR FLOW
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