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Chapter 4 Protective Functions; Inverter Fault And Alarm Indications - Mitsubishi Electric 800 Series Hardware Instruction Manual

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4
PROTECTIVE FUNCTIONS
This chapter explains the "PROTECTIVE FUNCTIONS" that operate in this product.
Always read the instructions before use.
4.1

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 is activated to shut off the inverter output.
• 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 is activated, note the following points.
Item
Fault output signal
Fault or alarm indication
Operation restart method
• Inverter fault or alarm indications are categorized as follows.
Displayed item
Error message
Warning
Alarm
Fault
NOTE
• For the details of fault indications and other malfunctions, refer to the FR-A800 Instruction Manual (Detailed).
• The last eight faults can be displayed on the operation panel. (Fault history) (For the operation, refer to
96
4. PROTECTIVE FUNCTIONS
4.1 Inverter fault and alarm indications
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 is activated, 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.
A message regarding operational fault and setting fault by the operation panel and the parameter unit. The
inverter output is not shut off.
The inverter output is not shut off even when a warning is displayed. However, failure to take appropriate
measures will lead to a fault.
The inverter output is not shut off. An Alarm (LF) signal can also be output with a parameter setting.
When a protective function is activated, the inverter output is shut off and a Fault (ALM) signal is output.
Description
Description
page
98.)

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