Mitsubishi Electric FR-S520E Series Instruction Manual page 200

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, FR-S520SE-1.5K MMF-06D24DS BKO-C2461H07
FR-S540E-1.5K, 2.2K, 3.7K
Removal
1) Remove the front cover and wiring cover.
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
MMF-06D24ES-FC4 BKO-CA1027H09
AIR FLOW
190
Fan Type