Mitsubishi Electric FR-A700 Instruction Manual page 147

Causes and corrective actions
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
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
142
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 exceeded
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 section 4 of Instruction Manual (applied).)
E.IOH
Inrush current limit circuit alarm
This function is activated when the resistor of the inrush current limit circuit overheats. The inrush
current limit circuit failure
· Check that frequent power ON/OFF is not repeated.
· Check that the primary side fuse (5A) in the power supply circuit of the inrush current limit circuit
contactor (FR-A740-110K or more) is not fused.
· Check that the power supply circuit of inrush current limit circuit contactor is not damaged.
Configure a circuit where frequent power ON/OFF is not repeated.
If the problem still persists after taking the above measure, please contact your sales representative.
E.SER
Communication error (inverter)
This function stops the inverter output when communication error occurs consecutively for more than
permissible retry count when a value other than "9999" is set in Pr. 335 RS-485 communication retry count
during RS-485 communication from the RS-485 terminals. This function also stops the inverter output if
communication is broken for the period of time set in Pr. 336 RS-485 communication check time interval.
Check the RS-485 terminal wiring.
Perform wiring of the RS-485 terminals properly.
E.AIE
Analog input error
Appears when 30mA or more is input or a voltage (7.5V or more) is input with the terminal 2/4 set to
current input.
Check the setting of Pr. 73 Analog input selection, Pr. 267 Terminal 4 input selection and voltage/current
input switch. (Refer to section 4 of
Either give a frequency command by current input or set Pr. 73 Analog input selection, Pr. 267 Terminal 4
input selection, and voltage/current input switch to voltage input.
E.USB
USB communication error
When the time set in Pr. 548 USB communication check time interval has broken, this function stops the
inverter output.
Check the USB communication cable.
· 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, change the setting to 9999.
(Refer to section 4 of Instruction Manual (applied))
FR-PU04
E.P24
FR-PU07
FR-PU04 Fault 14
FR-PU07 OC detect level
FR-PU04 Fault 14
FR-PU07 Inrush overheat
FR-PU04 Fault 14
FR-PU07 VFD Comm error
FR-PU04 Fault 14
FR-PU07 Analog in error
Instruction Manual (applied).)
FR-PU04 Fault 14
FR-PU07 USB comm error