Inverter Fault And Alarm Indications - Mitsubishi Electric FR-A820-00046 Instruction Manual

Protective functions
6 Protective functions
6.1

Inverter fault and alarm indications

● When the inverter detects a fault, depending on the nature of the fault, the operation panel
displays an error message or warning, or a protective function activates to trip the inverter.
● When any fault occurs, take an appropriate corrective action, then reset the inverter, and resume
the operation.
Restarting the operation without a reset may break or damage the inverter.
● When a protective function activates, note the following points.
Item
Fault output signal
Fault or alarm indication
Operation restart method
Tab. 6-1:
● Inverter fault or alarm indications are categorized as below.
Displayed item
Error message
Warning
Alarm
Fault
Tab. 6-2:
NOTE The past eight faults can be displayed on the operation panel. (Faults history)
(For the operation, refer to page 6-3.)
FR-A800
Description
Opening the magnetic contactor (MC) provided on the input side of the inverter at a fault
occurrence shuts off the control power to the inverter, therefore, the fault output will not
be retained.
When a protective function activates, the operation panel displays a fault indication.
While a protective function is activated, the inverter output is kept shutoff. Reset the
inverter to restart the operation.
Behaviour when a protective function is activated
Description
A message regarding an operational fault and setting fault by the operation panel and
the parameter unit. The inverter does not trip.
The inverter does not trip even when a warning. However, failure to take appropriate
measures will lead to a fault.
The inverter does not trip. An Alarm (LF) signal can also be output with a parameter
setting.
A protective function activates to trip the inverter and output a Fault (ALM) signal.
Categories of faults and alarms
Inverter fault and alarm indications
6 - 1