Mitsubishi Electric FR-F806-E Hardware Instruction Manual page 86

 Life display of internal air circulation fans
• IP55 compatible models are equipped with the internal air circulation fan inside the inverter other than the cooling fan.
The internal fan fault "FN2" appears on the operation panel (FR-LU08-01) when the rotations per minute is less than
70% of the rated value for the internal air circulation fan. (FN is displayed on the parameter unit (FR-PU07).) As an
alarm display, Pr.255 bit 4 is turned ON and also a warning is output to the Y90 signal and Alarm (LF) signal.
• For the terminal used for the LF signal, set "98 (positive logic) or 198" (negative logic) in any of Pr.190 to Pr.196
(Output terminal function selection).
NOTE
• Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
• For replacement of each part, contact the nearest Mitsubishi Electric FA center.
Replacement procedure of the fan
The replacement interval of the cooling fan used for cooling the parts generating heat such as the main circuit semiconductor
is greatly affected by the ambient temperature. When unusual noise and/or vibration are noticed during inspection, the cooling
fan must be replaced immediately.
NOTE
• Switch the power OFF before replacing fans. Even after the power supply is shut off, the inverter is charged and can cause
an electric shock. Before replacing the fan, make sure to check that the voltage across inverter main circuit terminals P/+ and
N/- has been dropped enough using a tester after 10 minutes or more after the power supply shutoff.
 Removal of the cooling fan (FR-F846-00250(11K) to 00470(22K))
(1) Remove the installation screws, and then remove the fan cover.
(2) Disconnect the fan connectors.
(3) Remove the installation screws, and then remove the fan.
Installation screw
Fan connector
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
Inspection item
Fan cover
Installation screw
5
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