Mitsubishi FREQROL-E700 Manual page 100

Function name
Internal board The control circuit board
fault and the main circuit board
do not match.
PU • A communication error has
disconnection
• The communication interval
• The number of communication
Retry count Operation restart within the set
excess* number of retries has failed.
2
CPU fault An error has occurred in the
CPU and in the peripheral
circuits.
Major
Brake A sequence error has
fault
sequence occurred while the brake
fault* sequence function (Pr.278
2
to Pr.283) is valid.
Inrush current The resistor of the inrush
limit circuit current limit circuit has
fault overheated.
Analog input A voltage (current) has
fault been input to terminal 4
when the setting in Pr. 267
Terminal 4 input selection
and the setting of voltage/
current input switch are
different.
USB The communication has
communication been broken for Pr. 548
fault USB communication check
time interval.
Internal circuit An internal circuit fault has
fault occurred.
*1 Resetting the inverter initializes the internal cumulative heat value of the electronic thermal relay function.
*2 This protective function is not available in the default state.
*3 This functions only for devices with 3-phase power input.
Description
occurred between the PU and
the inverter.
has exceeded the permissible
time period during RS-485
communication via the PU
connector.
errors has exceeded the
number of retries.
Corrective action
Please contact your sales representative.
(For parts replacement, consult the nearest Mitsubishi
FA Center.)
• Connect the parameter unit cable securely.
• Check the communication data and communication
settings.
• Increase the Pr. 122 PU communication check time
interval setting, or set "9999" (no communication
check).
Eliminate the cause of the error preceding this alarm
indication.
• Take measures against noises if there are devices
producing excess electrical noises around the inverter.
• Check the connection between the terminals PC and
SD. (E6/E7)
• If the situation does not improve after taking the above
measure, please contact your sales representative.
Check the parameter setting and check the wiring.
Configure a circuit where frequent power ON/OFF is not
repeated.
If the situation does not improve after taking the above
measure, please contact your sales representative.
Give a frequency command by a current input or set
Pr.267 Terminal 4 input selection, and set the voltage/
current input switch to voltage input.
• Check the Pr.548 USB communication check time
interval setting.
• Check the USB communication cable.
• Increase the Pr.548 USB communication check time
interval setting, or set "9999".
Please contact your sales representative.
App.2-6
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