Mitsubishi Electric FR-A800, Instruction Manual

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Protective functions Inverter fault and alarm indications
FR-A800 6 - 1
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.
●
Inverter fault or alarm indications are categorized as below.
Item Description
Fault output signal
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.
Fault or alarm indication When a protective function activates, the operation panel displays a fault indication.
Operation restart method
While a protective function is activated, the inverter output is kept shutoff. Reset the
inverter to restart the operation.
Tab. 6-1: Behaviour when a protective function is activated
Displayed item Description
Error message
A message regarding an operational fault and setting fault by the operation panel and
the parameter unit. The inverter does not trip.
Warning
The inverter does not trip even when a warning. However, failure to take appropriate
measures will lead to a fault.
Alarm
The inverter does not trip. An Alarm (LF) signal can also be output with a parameter
setting.
Fault A protective function activates to trip the inverter and output a Fault (ALM) signal.
Tab. 6-2: Categories of faults and alarms
NOTE The past eight faults can be displayed on the operation panel. (Faults history)
(For the operation, refer to page 6-3.)