Mitsubishi Electric F700 Instruction Manual page 245

Causes and corrective actions
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Operation Panel
Indication
Name
Description
Check point
Corrective action
238
E. 6
E. 7
E.CPU
CPU fault
Stops the inverter output if the communication error of the built-in CPU occurs.
Check for devices producing excess electrical noises around the inverter.
· Take measures against noises if there are devices producing excess electrical noises around the
inverter.
· Please contact your sales representative.
E.CTE
Operation panel power supply short circuit, RS-485 terminal power supply short circuit
When the operation panel power supply (PU connector) is shorted, this function shuts off the power
output. At this time, the operation panel (parameter unit) cannot be used and RS-485
communication from the PU connector cannot be made. When the power supply for RS-485
terminal is shorted, this function shuts off the power output.
At this time, communication from the RS-485 terminal cannot be made.
To reset, enter the RES signal or switch power off, then on again.
1. Check for a short circuit in the PU connector cable.
2. Check that the RS 485 terminal is connected correctly.
1. Check the PU and cable.
2. Check the connection of the RS-485 terminal
E.P24
24VDC power output short circuit
When the 24VDC power output from the PC terminal is shorted, this function shuts off the power output.
At this time, all external contact inputs switch off. The inverter cannot be reset by entering the RES
signal. To reset it, use the operation panel or switch power off, then on again.
· Check for a short circuit in the PC terminal output.
· Remedy the earth (ground) fault portion.
E.CDO
Output current detection value excess
This function is activated when the output current exceeds the Pr. 150 Output current detection level
setting.
Check the settings of Pr. 150 Output current detection level, Pr. 151 Output current detection signal delay
time, Pr. 166 Output current detection signal retention time, Pr. 167 Output current detection operation
selection. (Refer to page 96.)
E.IOH
Inrush resistance overheat
This function is activated when the resistor of the inrush current limit circuit overheats. (activated
when the temperature reaches or exceeds 180°C for 5s consecutively)
1. Check that the inrush current is not large.
2. Check that frequent ON/OFF is not repeated in the circuit which starts upon powering on.
1. The inrush current limit circuit failure
2. Configure a circuit where frequent ON/OFF is not repeated.
If the problem still persists after taking the above measure, please contact your sales
representative.
Fault 6
FR-PU04 Fault 7
CPU Fault

FR-PU04
FR-PU04 E.P24
FR-PU04 Fault 14
FR-PU04 Fault 14