Chapter 6 Protective Functions; Converter Unit Fault And Alarm Indications - Mitsubishi Electric FR-CC2-N Series Instruction Manual

6
PROTECTIVE FUNCTIONS
This chapter explains the "PROTECTIVE FUNCTIONS" that operate in this product.
Always read the instructions before use.
6.1

Converter unit fault and alarm indications

• When the converter unit detects a fault, the PU displays an indication such as error message or warning, or a protective
function activates to shut off the inverter output in accordance with the fault.
• When any fault occurs, take an appropriate corrective action, then reset the converter unit or the inverter, and resume the
operation. Restarting the operation without a reset may break or damage the converter unit or the inverter.
• When a protective function is activated, note the following points.
Item
Fault signal
Fault indication
Operation restart method
• Converter unit fault or alarm indications are categorized as follows:
Displayed item
Error message
Warning
Alarm
Fault
NOTE
• The last eight faults can be displayed on the operation panel. (Fault history) (For the operation, refer to
138
6. PROTECTIVE FUNCTIONS
6.1 Converter unit fault and alarm indications
Opening the magnetic contactor (MC) provided on the input side of the converter unit at a fault occurrence
shuts off the control power to the converter unit, therefore, the fault output will not be retained.
When a protective function is activated, the PU displays a fault indication.
While a protective function is activated, the inverter output is kept shutoff. Reset the converter unit or the
inverter to restart the operation.
A message regarding operational fault and setting fault by the operation panel is displayed. 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 140.)