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Reset method of protective function
When a fault occurs in the drive unit, the drive unit trips and the PU display automatically changes to one 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.
Retention of fault output signal.........When the magnetic contactor (MC) provided on the input side of the drive unit is
opened when a fault occurs, the drive unit's control power will be lost and the fault
output will not be held.
Fault or alarm indication ...................When a fault or alarm occurs, the operation panel display automatically switches to
the fault or alarm indication.
Resetting method .............................When a fault occurs, the drive unit output is kept stopped. Unless reset, therefore, the
drive unit cannot restart. (Refer to page 266)
When any fault occurs, take the appropriate corrective action, then reset the drive unit, and resume operation. Not doing so
may lead to the drive unit fault and damage.
Drive unit fault or alarm indications are roughly categorized as below.
(1) Error message
A message regarding operational fault and setting fault by the operation panel and parameter unit (FR-PU07) is
displayed. The drive unit does not trip.
(2) Warning
The drive unit does not trip even when a warning is displayed. However, failure to take appropriate measures will lead to a fault.
(3) Alarm
The drive unit does not trip. You can also output an alarm signal by making parameter setting.
(4) Fault
When a fault occurs, the drive unit trips and a fault signal is output.
5.1 Reset method of protective function
(1) Resetting the drive unit
The drive unit can be reset by performing any of the following operations. Note that the internal accumulated heat value of the
electronic thermal relay function and the number of retries are cleared (erased) by resetting the drive unit.
Drive unit recovers about 1s after the reset is released.
REMARKS
Past eight faults can be displayed using the setting dial. (Refer to page 48)
Operation 1: Using the operation panel, press to reset the drive unit.
(This may only be performed when a fault occurs (Refer to page 272 for
fault.))
Operation 2: 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 drive unit is in a
reset status.)
Operation 3: Switch power OFF once. After the indicator of the operation panel turns
OFF, switch it ON again.
SD
Drive unit
RES
ON
OFF
REMARKS
Use the operation 1 or 2 to reset when using the 24V external power supply. (Drive unit with FR-E7DS mounted.) (Refer to page
316)
OFF status of the start signal must be confirmed before resetting the drive unit fault. Resetting drive unit fault with the start
signal ON restarts the motor suddenly.