Mitsubishi Electric FR-A701 Instrucion Manual page 160

Operation Panel
E.EP
Indication
Name
Encoder phase error
Stops the inverter output when the rotation command of the inverter differs from the actual motor
Description
rotation direction detected from the encoder.
This protective function does not function in the initial status.
· Check for mis-wiring of the encoder cable.
Check point
· Check for wrong setting of Pr. 359 Encoder rotation direction.
· Perform connection and wiring securely.
Corrective action
· Change the Pr. 359 Encoder rotation direction value.
Operation Panel
E.P24
Indication
Name 24VDC power output short circuit
When the 24VDC power output from the PC terminal is shorted, this function shuts off the power
output.
Description
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 point · Check for a short circuit in the PC terminal output.
Corrective action
· Remedy the earth (ground) fault portion.
Operation Panel
E.CDO
Indication
Name
Output current detection value exceeded
Stops the inverter output when the output current exceeds the setting of Pr. 150 Output current detection
Description
level. Functions when Pr. 167 Output current detection operation selection is set to "1".
When the initial value (Pr. 167 = "0") is set, this protective function does not function.
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.
Check point
(Refer to chapter 4 of
Operation Panel
E.IOH
Indication
Name Inrush current limit circuit fault
Stops the inverter output when the resistor of inrush current limit circuit overheated. The inrush current
Description
limit circuit failure
· Check that frequent power ON/OFF is not repeated.
Check point
· 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.
Corrective action
If the problem still persists after taking the above measure, please contact your sales representative.
Operation Panel
E.SER
Indication
Name 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
Description
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 point
Check the RS-485 terminal wiring.
Corrective action Perform wiring of the RS-485 terminals properly.
FR-PU04
FR-PU07
FR-PU04
FR-PU07
FR-PU04
FR-PU07
the instruction manual (applied).)
FR-PU04
FR-PU07
FR-PU04
FR-PU07
Causes and corrective actions
Fault 14
E.EP
E.P24
Fault 14
OC detect level
Fault 14
Inrush overheat
Fault 14
VFD Comm error
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