Reset Method Of Protective Function - Mitsubishi Electric 700 Series Instruction Manual

Reset method of protective function

When a fault occurs in the inverter, the inverter trips and the display on the operation panel automatically changes to a fault or
alarm indication shown on page 193.
If the fault does not correspond to any of the following faults or if you have any other problem, please contact your sales
representative.
Retention of fault output signal... When the magnetic contactor (MC) provided on the input side of the inverter is opened
Fault or alarm indication .......... When a fault or alarm occurs, the operation panel display automatically switches to the fault
Resetting method .................... When a fault occurs, the inverter output is kept stopped. Unless reset, therefore, the inverter
When any fault occurs, take the appropriate corrective action, then reset the inverter, and resume operation.
Not doing so may lead to the inverter fault and damage.
Inverter fault or alarm indications are roughly categorized as below.
(1) Error message
A message regarding operational fault and setting fault by the operation panel is displayed. The inverter does not trip.
(2) Warning
The inverter does not trip even when a warning is displayed. However, failure to take appropriate measures will lead to a fault.
(3) Alarm
The inverter does not trip.
(4) Fault
When a fault occurs, the inverter trips, and the ALM signal
is also output.
REMARKS
Past eight faults can be displayed using the setting dial.
6.1

Reset method of protective function

(1) Resetting the inverter
The inverter can be reset by performing any of the following operations. Note that the internal thermal integrated value of the
electronic thermal relay function and the number of retries are cleared (erased) by resetting the inverter.
Inverter recovers about 1s after the reset is released.
Operation 1: ...... Using the operation panel, press
(This may only be performed when a fault occurs. (Refer to page 197 for fault.))
Operation 2: . ...... Change the error reset signal setting of FL remote communication from "0" to "1."
(This may only be performed when a fault occurs. (Refer to page 197 for fault.))
Operation 3: ....... Switch OFF the power once, then switch it ON again after the indication of the
operation panel turns OFF.
REMARKS
Use the operation 1 or 2 to reset when using the 24V external power supply.
NOTE
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.
192
when a fault occurs, the inverter's control power will be lost and the fault output will not be
held.
or alarm indication.
cannot restart. (Refer to page 192)
to reset the inverter.
Inverter fault occurrence
(Trip)
Output
frequency
ALM OFF
ON
Error reset ON OFF
Reset processing
Reset ON
Time
(about 1s)
ON
OFF