Mitsubishi Electric FR-D720S SC EC, Instruction Manual, Page: 453 / 512

Troubleshooting Reset method of protective function
FR-D700 SC EC 7 - 17
7.3 Reset method of protective function
Eliminate the cause of the error before you reset the inverter. Note that the internal thermal in-
tegrated value of the electronic thermal relay function and the number of retries are cleared
(erased) by resetting the inverter. It takes about 1s for reset.
The inverter can be reset by performing any of the following operations:
●
Using the operation panel, press the STOP/RESET key to reset the inverter.
(Enabled only when the inverter protective function is activated (major fault). (Refer to
page 7-9 for major fault.))
●
Switch OFF the power once, then switch it ON again after the indicator of the operation panel
turns OFF.
●
Turn on the reset signal RES for more than 0.1s. (Connect the terminals RES and SD when
using sink logic or terminals RES and PC as shown Fig. 7-3 when using source logic).
(If the RES signal is kept on, "Err." appears (flickers) to indicate that the inverter is in the
reset status.)
Fig. 7-1:
Resetting the inverter by using the operation
panel
I002022E
Fig. 7-2:
Resetting the inverter by switching the power
supply off an on
I001297E
Fig. 7-3:
Resetting the inverter by turning on the RES
signal
I000249C
b
CAUTION:
OFF status of the start signal must be confirmed before resetting the inverter fault.
Resetting inverter fault with the start signal ON restarts the motor suddenly.
RESET
RES
PC
Inverter