(E) Environment setting parameters
When measuring the main circuit capacitor capacity (Pr. 259 = "1"), the DC voltage is applied to
the motor for about 1 s at power OFF. Never touch the motor terminal, etc. right after powering
OFF to prevent an electric shock.
Life display of the cooling fan
● If a cooling fan speed of less than the specified speed (refer below) is detected, Fan alarm
(FN) is displayed on the operation panel and the parameter unit. As an alarm display, Pr. 255 bit 2
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).
FR-F820-00250(5.5K) or lower, FR-F820-03160(75K) or higher
FR-F840-00126(5.5K) or lower
FR-F820-00340(7.5K) to FR-F820-02330(55K)
FR-F840-00170(7.5K) to FR-F840-03610(160K)
FR-F840-04320(185K) or higher
FR-F842-07700(355K) or higher
When the inverter is mounted with two or more cooling fans, "FN" is displayed with one or more
fans with speed of 50% or less.
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 FA center.
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Warning level of different inverters
Less than 50% of the rated rotations
Less than 70% of the rated rotations
Approx. less than 1700 r/min