Mitsubishi Electric FR-A700 Instruction Manual page 410

Selection and protection of a motor
If offline auto tuning ended in error (see the table below), motor constants are not set. Perform
an inverter reset and restart tuning.
Pr. 96 Setting
Tab. 6-52: Settings for parameter 96
When tuning is ended forcibly by pressing the STOP/RESET key or turning off the start signal
(STF or STR) during tuning, offline autotuning does not end normally. (The motor constants
have not been set.) Perform an inverter reset and restart tuning.
NOTES
The motor constants measured once in the offline auto tuning are stored as parameters and
their data are held until the offline auto tuning is performed again.
An instantaneous power failure occurring during tuning will result in a tuning error. After
power is restored, the inverter goes into the normal operation mode. 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 ordinary mode. Note that if a fault
retry has been set, retry is ignored.
The set frequency monitor displayed during the offline auto tuning is 0Hz.
b
CAUTION:
● Note that the motor may start running suddenly.
● When the offline auto tuning is used in vertical lift application, e.g. a lifter, it may
drop due to insufficient torque.
6 - 230
Error Cause
Forced end
8
9 Inverter protective function operation
Current limit (stall prevention) function was
91
activated.
Converter output voltage reached 75% of
92
rated value.
– Calculation error
93
– A motor is not connected.
Remedy
Set "1" or "101" in Pr. 96 and perform tuning
again.
Make setting again.
Increase acceleration/deceleration time.
Set "1" in Pr. 156.
Check for fluctuation of power supply voltage.
Check the motor wiring and make setting
again.
Parameter