Mitsubishi Electric FR-A800, Instruction Manual

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Parameters (C) Motor constant parameters
FR-A800 5 - 461
●
If offline auto tuning has ended in error (see the table below), motor constants are not set.
Perform an inverter reset and restart tuning.
●
When tuning is ended forcibly by pressing STOP/RESET key or turning OFF the start signal (STF or
STR) during tuning, offline auto tuning does not end properly. (The motor constants have not
been set.)
Perform an inverter reset and restart tuning.
Error display Error cause Countermeasures
8 Forced end Set Pr. 96 (Pr. 463) = "1" or "11" and try again.
9 Inverter protective function operation Make the setting again.
92
The converter output voltage has dropped to
75% of the rated voltage.
Check for the power supply voltage fluctuation.
Check the Pr. 84 "Rated motor frequency" setting.
93
Calculation error.
The motor is not connected.
Check the motor wiring and make the setting again.
94
Rotation tuning frequency setting error
(The frequency command for the tuning was
given to exceed the maximum frequency
setting, or to be in the frequency jump range.)
Check the Pr. 1" Maximum frequency" and Pr. 31 to
Pr. 36 Frequency jump settings.
Tab. 5-190: Settings for Pr. 96 (Pr. 463)
NOTES An instantaneous power failure occurring during tuning will result in a tuning error.
After power is restored, the inverter starts normal operation. Therefore, when STF (STR) signal is
ON, the motor runs in the forward (reverse) rotation.
Any alarm occurring during tuning is handled as in the normal operation. However, if the retry
function is set, no retry is performed even when a protective function that performs a retry is acti-
vated.
The set frequency monitor displayed during the offline auto tuning is 0 Hz.
E
CAUTION:
Note that the motor may start running suddenly.