Mitsubishi Electric FR-D720S SC EC Instruction Manual page 127

Basic settings
Return to normal operation
When offline auto tuning ends, press the STOP/RESET key of the operation panel during PU op-
eration. For external operation, turn off the start signal (STF signal or STR signal) once.
This operation resets the offline auto tuning and the PU's monitor display returns to the normal
indication. (Without this operation, next operation cannot be started.)
If offline auto tuning ended in error (see the table below), motor constants are not set. Perform
an inverter reset and restart tuning.
Value of Pr. 96
8
9
91
92
93
Tab. 5-5: Value of Parameter 96
When tuning is ended forcibly by pressing the STOP-key or turning off the start signal (STF or
STR) during tuning, offline auto tuning does not end normally. The motor constants have not
been set. Perform an inverter reset and restart tuning.
When using the motor corresponding to the following specifications and conditions, reset Pr. 9
"Electronic thermal O/L relay" as below after tuning is completed.
● When the rated power specifications of the motor is 200/220V(400/440V) 60Hz, set 1.1 times
rated motor current value in Pr. 9.
● When performing motor protection from overheat using a PTC thermistor or motor with
temperature detector such as Klixon, set "0" (motor overheat protection by the inverter is
invalid) in Pr. 9.
When you know motor excitation current (no load current), set the value in Pr. 82.
FR-D700 SC EC
Error Cause
Forced end
Inverter protective function operation
Current limit (stall prevention) function was
activated.
Converter output voltage reached 75% of rated
value.
– Calculation error
– A motor is not connected.
Simple mode parameter list
Remedy
Set "11" 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.
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