Converter Fault And Indication; Reset Method For The Protective Functions - Mitsubishi Electric FR-XC-18.5K-PWM Instruction Manual

Converter fault and indication

4.1
Converter fault and indication
When a fault occurs in the converter, a protective function is automatically activated to shut off the converter output and show
an indication on the PU and on the operation status 7-segment LED display of the converter.
If any indication which is not shown in the list of indications (provided in a subsequent section) appears or if you have any
other problem, please contact your sales representative.
• Indication: When a protective function is activated, the display on the PU and on the converter automatically shows an
indication.
• Reset: While a protective function is activated, the converter output is kept shutoff. Reset the converter to restart the
operation.
• When any protective function is activated, take an appropriate corrective action before resetting the product to resume the
operation. Failure to do so may break or damage the converter.
• The converter indications are roughly categorized as below.
• Error message
A message regarding operational fault or setting fault on the operation panel is displayed. The converter output is not
shut off.
• Warning
The converter output is not shut off even when a warning is displayed. However, failure to take appropriate measures
will lead to a fault.
• Alarm
The converter output is not shut off. The Alarm (LF) signal can be output depending on the parameter setting.
• Fault
When a protective function is activated, the converter output is shut off and the Fault (ALM) signal is output.
4.2

Reset method for the protective functions

Reset the converter by performing any of the following methods. Note that the internal accumulated heat value of the
electronic thermal relay function and the number of retries are cleared (erased) by resetting the converter.
The converter recovers about 1 second after the reset is released.
Method 1: Press on the PU.
(This method is available only when a fault occurs. Refer to
page 136
Method 2: Switch the converter power OFF once, then switch it ON again.
Method 3: Turn ON the Reset (RES) signal and keep it ON for more than
0.1 seconds. (If the RES signal is kept ON, "AA" appears
(blinks) on the converter display to indicate that the
converter is in a reset state.)
132
PROTECTIVE FUNCTIONS
for details of faults.)
ON
OFF
Multifunction regeneration
converter
RES
SD