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Mitsubishi Electric FR-F740-00023 Instruction Manual: Reset Method Of Protective Function

F700 series.
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Reset method of protective function

When a fault occurs in the inverter, the inverter trips and the PU display automatically changes to any of the following
fault or alarm indications.
If the fault does not correspond to any of the following faults or if you have any other problem, please contact your sales
representative or distributor.
Retention of fault output signal.................When the magnetic contactor (MC) provided on the input side of the
Fault or alarm indication ...........................When a fault or alarm occurs, the operation panel display automatically
Resetting method .....................................When a fault occurs, the inverter output is kept stopped. Unless reset,
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 divided as below.
(1) Error message
A message regarding operational fault and setting fault by the operation panel (FR-DU07) and parameter unit (FR-
PU04 /FR-PU07) is displayed. The inverter does not trip.
(2) Warnings
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. You can also output an alarm signal by making parameter setting.
(4) Fault
When a fault occurs, the inverter trips and a fault signal is output.
5.1 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 274 for
Operation 2:...... Switch OFF the power once, then switch it ON again after the indicator
of the operation panel turns OFF.
Operation 3: ..... Turn on the reset signal (RES) for more than 0.1s. (If the RES signal is
kept on, "Err." appears (flickers) to indicate that the inverter is in a reset
inverter is opened when a fault occurs, the inverter's control power will be
lost and the fault output will not be held.
switches to the fault or alarm indication
therefore, the inverter cannot restart. (Refer to page 268.)
to reset the inverter.


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