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Reset method of protective function
7
7 TROUBLESHOOTING
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.
z
Retention of fault output signal
.. When the magnetic contactor (MC) provided on the input side of the drive unit is opened at a
fault occurrence, the drive unit's control power will be lost and the fault output will not be held.
z Fault or alarm indication...........When a fault or alarm occurs, the operation panel display automatically switches to the fault
or alarm indication.
z Resetting method.....................When a fault occurs, the drive unit output is kept stopped. Unless reset, therefore, the drive
unit cannot restart. (Refer to page 31)
z 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.
7.1 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 thermal integrated 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
y For the details of fault displays and other malfunctions, also refer to the Instruction Manual (Applied).
y Past eight faults can be displayed using the setting dial. (Refer to page 3 for the operation.)
Operation 1: ......Using the operation panel, press to reset the drive unit.
(This may only be performed when a fault occurs (Refer to page 32 for
fault.))
Operation 2:.......Switch power OFF once. After the indicator of the operation panel
turns OFF, switch it ON again.
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 drive unit is in a
reset status.)
NOTE
y 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.
ON
OFF
SD
Drive unit
RES