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Reset method of protective function
6 TROUBLESHOOTING
When a fault occurs in the inverter, the inverter trips and the display on the operation panel automatically changes to one of
the fault or alarm indications on page 30.
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 inverter is opened when
a fault occurs, the inverter'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 inverter output is kept stopped. Unless reset, therefore, the inverter
cannot restart.
z 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. An alarm can also be output with a parameter setting.
(4) Fault
When a fault occurs, the inverter trips and a fault signal is output. The ALM signal is also output.
6.1 Reset method of protective function
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 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.
Operation 1: ......Using the operation panel, press to reset the inverter.
(This may only be performed when a fault occurs.)
Operation 2: ......Write HFD (inverter reset) to an instruction code of CC-Link
communication.
(Inverter reset though CC-Link communication is invalid during
communication error.)
Operation 3: ......Switch OFF the power once, then switch it ON again after the
indicator of the operation panel turns OFF.
REMARKS
y Use the operation 1 or 2 to reset when using the 24V external power supply.
NOTE
y 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.
ON
OFF