Mitsubishi FREQROL-E700, Руководство пользователя

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App.2-6
Function name Description Corrective action Display
Major
fault
Internal board
fault
The control circuit board
and the main circuit board
do not match.
Please contact your sales representative.
(For parts replacement, consult the nearest Mitsubishi
FA Center.)
PU
disconnection
• A communication error has
occurred between the PU and
the inverter.
• The communication interval
has exceeded the permissible
time period during RS-485
communication via the PU
connector.
• The number of communication
errors has exceeded the
number of retries.
• 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).
Retry count
excess*
2
Operation restart within the set
number of retries has failed.
Eliminate the cause of the error preceding this alarm
indication.
CPU fault An error has occurred in the
CPU and in the peripheral
circuits.
• 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.
Brake
sequence
fault*
2
A sequence error has
occurred while the brake
sequence function (Pr.278
to Pr.283) is valid.
Check the parameter setting and check the wiring.
Inrush current
limit circuit
fault
The resistor of the inrush
current limit circuit has
overheated.
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.
Analog input
fault
A voltage (current) has
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.
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.
USB
communication
fault
The communication has
been broken for Pr. 548
USB communication check
time interval.
• 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".
Internal circuit
fault
An internal circuit fault has
occurred.
Please contact your sales representative.
*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.