Mitsubishi Electric FR-D700 Instruction Manual page 140

Operation selection at power failure and instantaneous power failure
4) If offline auto tuning ended in error (see the table below), motor constants are not set.
Perform an inverter reset and restart tuning.
Error
Display
8 Forced end
9 Inverter protective function operation
Current limit (stall prevention) function was
91
activated.
Converter output voltage reached 75% of rated
92
value.
Calculation error
93
A motor is not connected.
5) When tuning is ended forcibly by pressing
tuning does not end normally. (The motor constants have not been set.)
Perform an inverter reset and restart tuning.
NOTE
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.
Changing the terminal assignment using Pr.178 to Pr.182 (input terminal function selection) may affect the other functions.
Make setting after confirming the function of each terminal.
The SU and FU signals are not output during a restart. They are output after the restart cushion time has elapsed.
Automatic restart operation will also be performed after a reset or when a retry is made by the retry function.
When automatic restart after instantaneous power failure has been selected, the motor and machine will start
suddenly (after the reset time has elapsed) after occurrence of an instantaneous power failure.
Stay away from the motor and machine.
When you have selected automatic restart after instantaneous power failure function, apply in easily visible
places the CAUTION stickers supplied to the Installation guideline.
When the start signal is turned off or
power failure, deceleration starts after Pr. 58 Restart cushion time has elapsed.
Parameters referred to
Pr. 7 Acceleration time
Pr. 13 Starting frequency
Pr. 65, Pr. 67 to Pr. 69 Retry function
Pr. 71 Applied motor
Pr. 78 Reverse rotation prevention selection
Pr. 178 to Pr. 182 (input terminal function selection)
136
Error Cause
or turning off the start signal (STF or STR) during tuning, offline auto
CAUTION
is pressed during the restart cushion time after instantaneous
Refer to page 91
Refer to page 93
Refer to page 139
Refer to page 98
Refer to page 157
Refer to page 108
Remedy
Set "21" in Pr. 96 and perform tuning again.
Make setting again.
Set "1" in Pr. 156.
Check for fluctuation of power supply voltage.
Check the motor wiring and make setting again.
Set the rated current of the motor in Pr. 9.