Mitsubishi Electric 700 Series Instruction Manual page 207

Causes and corrective actions
E. 5
E. 6
Operation panel
indication
E. 7
E.CPU
Name
CPU fault
Description
Stops the inverter output if the communication fault of the built-in CPU occurs.
Check for devices producing excess electrical noises around the inverter.
Check point
Check if the terminals PC and SD are shorted. (E.6/ E.7)
Take measures against noises if there are devices producing excess electrical noises around the inverter.
Corrective action Check the connection between terminals PC and SD. (E.6/ E.7)
Please contact your sales representative.
Operation panel
E.IOH
indication
Name
Inrush current limit circuit fault
Description
Stops the inverter output when the resistor of inrush current limit circuit overheated. The inrush current limit circuit fault
Check point
Check that frequent power ON/OFF is not repeated.
Configure a circuit where frequent power ON/OFF is not repeated.
Corrective action
If the problem still persists after taking the above measure, please contact your sales representative.
Operation panel
E.13
indication
Name Internal circuit fault
Description Stop the inverter output when an internal circuit fault occurred.
Corrective action Please contact your sales representative.
Operation panel
E.SAF
indication
Name Safety circuit fault
Appears when safety circuit is malfunctioning.
Description
Appears when one of the lines between S1 and PC, or between S2 and PC is opened.
May appear when the start-up time of the 24V power supply is too long in the 24V external power supply operation.
If the indication appears when safety stop function is not used, check if shorting wires between S1 and PC, S2 and
PC are connected.
Check point If the indication appears when safety stop function is used, check that the safety relay module or the connection
has no fault.
Check if the start up time of the 24V external power supply is 500ms or longer.
When not using the safety stop function, short across terminals S1 and PC and across S2 and PC with shorting
wire. (Refer to page 24).
When using the safety stop function, check that wiring of terminal S1, S2 and PC is correct and the safety stop
Corrective action input signal source such as safety relay module is operating properly. Refer to the Safety stop function instruction
manual (BCN-A211508-004) for the details. Refer the front cover of the Instruction Manual (Basic) for how to obtain the
manual.
Set the start up time of the 24V external power supply within 500ms.
NOTE
If faults other than the above appear, contact your sales representative.
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