Mitsubishi Electric FR-CC2-P Instruction Manual page 139

Converter unit fault and alarm indications
6.1
Converter unit fault and alarm indications
• When the converter unit 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 a protective function is activated, take an appropriate corrective action, then reset the converter unit (inverter), and
resume the operation. Restarting the operation without a reset may break or damage the converter unit (inverter).
• When a protective function is activated, note the following points.
Item
Fault output signal
Fault or alarm indication
Operation restart method
• Converter unit fault or alarm indications are categorized as below.
Displayed item
Error message
Warning
Alarm
Fault
NOTE
• The past eight faults can be displayed on the operation panel. (Fault history) (For the operation, refer to
6.2
Reset method for the protective functions
Reset the converter unit by performing any of the following operations. Note that the accumulated heat value of the electronic
thermal relay function is cleared (erased) by resetting the inverter.
The converter unit recovers about 1 s after the reset is released.
• On the operation panel, press
(This may only be performed when a fault occurs. (Refer to
145 of the Instruction Manual for faults.))
• Switch power OFF once, then switch it ON again.
• Turn ON the reset signal (RES) for 0.1 s or more. (If the RES signal
is kept ON, "Err" appears (blinks) to indicate that the converter unit
is in a reset status.)
NOTE
• Resetting a converter unit fault with the inverter start signal ON restarts the inverter suddenly. OFF status of the inverter start
signal must be confirmed before resetting.
138
PROTECTIVE FUNCTIONS
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 operation panel displays a fault indication.
While a protective function is activated, the inverter output is kept shutoff. Reset the converter unit
(inverter) to restart the operation.
A message regarding an 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.
A protective function is activated to shut off the inverter output and output a Fault (ALM) signal.
to reset the converter unit.
Description
Description
page
ON
OFF
Converter unit
RES
SD
page 139.)