Troubleshooting - Mitsubishi Electric FR-F740-00023 Installation Manuallines

7 TROUBLESHOOTING

The frequency inverter FR-F700 has a multitude of protective functions which protect the drive and the inverter from dam-
age in case of a fault. When an alarm occurs in the inverter, the protective function is activated bringing the inverter to an
alarm stop and the PU display automatically changes to any of the following error (alarm) indications.
If the fault does not correspond to any of the following errors or if you have any other problem, please contact your sales
representative.
Retention of alarm output signal........When the magnetic contactor (MC) provided on the input side of the inverter is
Alarm display.....................................When the protective function is activated, the operation panel display
Resetting method ..............................When a protective function of the inverter is activated, the power output of the
If protective functions were activated (i. e. the inverter switched off with an error message) follow the instructions for error
correction provided in the manual for the inverter. Especially in the case of short circuits or earth contacts in the inverter output
and mains overvoltages the cause of the fault must be determined prior to switching on again as a recurrence of such faults at
short intervals can lead to premature aging of components or even the complete breakdown of the device. After the cause of
the fault has been found and corrected the inverter can be reset and operations continue.
Inverter fault or alarm indications are roughly divided as below:
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 shut off output.
Warning
The inverter does not shut off output even when a warning is displayed. However, failure to take appropriate measures
will lead to a fault.
Alarm
The inverter does not shut off output.You can also output an alarm signal by making parameter setting.
Fault
When the protective function is activated, the inverter output is shut off and an fault signal is output.
NOTES
For the details of fault displays and other malfunctions, also refer to the Instruction Manual.
Past eight faults can be displayed using the setting dial.
opened at the activation of the protective function, the inverter's control power will
be lost and the alarm output will not be held.
automatically switches to the fault or alarm indication.
inverter is blocked (motor is coasting). The inverter cannot start up again unless an
automatic restart has been configured or the inverter is reset. Please observe
carefully the warnings contained below in the configuration of an automatic restart
or the execution of a reset.
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