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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 changed immediately.
Inverter Model No. Fan type
FR-C520-1.5K, 2.2K, 3.7K MMF-06D24DS BKO-C2416H07
! Removal
1) Remove the front cover and wiring
cover.
(Refer to page 4)
2) Unplug the fan connector.
The cooling fan is connected with the
cooling fan connector on the side of the
inverter terminal block.
Unplug the connector to disconnect the
inverter and cooling fan.
3) Remove the cooling fan cover.
Remove the cover by disengaging the
fixing catches indicated by the arrows.
4) Remove the cooling fan and
cooling fan cover.
The cooling fan is secured by the fixing
catches.
Disengaging the fixing catches
removes 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 in the opposite direction of
the fan cover.
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.
4) Reinstall the wiring cover.
AIR FLOW
CAUTION
If the air flow is set in the wrong
direction, the inverter life can
be shorter.