Mitsubishi Electric FR-CC2-P, Инструкция по эксплуатации

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Causes and corrective actions
148
PROTECTIVE FUNCTIONS
Operation panel
indication
E.CTE
Name
Operation panel power supply short circuit / RS-485 terminals power supply short circuit
Description
• When the power supply for the operation panel (PU connector) is shorted, the power output is shutoff and
the inverter output is shut off. At this time, the use of the operation panel and the RS-485 communication via
the PU connector are disabled.
To reset, enter the RES signal, reset via communication through the RS-485 terminals, or switch power OFF
then ON again.
• When the power supply for the RS-485 terminals are short circuited, this function shuts off the power output.
At this time, communication from the RS-485 terminals cannot be made. To reset, use of the
operation panel, enter the RES signal, or switch power OFF then ON again.
Check point
• Check that the PU connector cable is not shorted.
• Check that the RS-485 terminals are connected correctly.
Corrective action
• Check the operation panel and the cable.
• Check the connection of the RS-485 terminals.
Operation panel
indication
E.P24
Name
24 VDC power fault
Description
• If the 24 VDC power supply output from terminal PC is shorted, or the voltage of the external 24 VDC power
supply is low, the power output is shutoff.
At this time, all external contact inputs turn OFF. The inverter cannot be reset by inputting the RES signal. To
reset it, use the operation panel, or switch power OFF, then ON again.
Check point
• Check for a short circuit in the PC terminal output.
• Check if the voltage supplied from the 24 V external power supply is correct.
Corrective action
• Repair the short-circuited portion.
• Supply the power at 24 V. (If the power with insufficient voltage is supplied to the 24 V input circuit for a long
time, the internal circuit may heats up. Input power at correct voltage although it will not damage the
converter unit.)
Operation panel
indication
E.IOH
Name
Inrush current limit circuit fault
Description
The inverter output is shut off when the resistor of the inrush current limit circuit is overheated. The inrush
current limit circuit failure
Check point
• Check that frequent power ON/OFF is not repeated.
• Check if the input side fuse (5A) in the power supply circuit of the inrush current limit circuit contactor is
blown.
• Check that the power supply circuit of inrush current limit circuit contactor is not damaged.
Corrective action
• Configure a circuit where power ON/OFF is not repeated.
• If the situation does not improve after taking the above measure, contact your sales representative.
Operation panel
indication
E.SER
Name
Communication fault (inverter)
Description
The inverter output is shut off when the RS-485 terminals are incorrectly connected. The inverter output is
shut off if communication has been cut off for the time set in
Pr.652 Parallel operation communication
check time while the converter unit is stopped.
Check point
• Check the RS-485 terminal wiring.
• Check that the time set in
Pr.652 is appropriate.
• Check for excessive noise around the converter unit.
Corrective action
• Perform wiring of the RS-485 terminals properly.
• Set the time set in
Pr.652 longer.
• Take measures against noise if there are devices producing excess electrical noises around the converter
unit.
If the situation does not improve after taking the above measure, contact your sales representative.
Operation panel
indication
E.PBT
E.13
Name
Internal circuit fault
Description
The inverter output is shut off when an internal circuit fault occurs in the converter unit.
Corrective action
Contact your sales representative.