Mitsubishi Electric FR-F740 EC Instruction Manual page 588

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
7 - 20
E.IOH
Inrush current limit circuit alarm
Trips when the resistor of the inrush current limit circuit overheats. The inrush current limit
circuit fault.
Check that frequent ON/OFF is not repeated.
Check that no meltdown is found in the primary side fuse (5A) in the power supply circuit
of the inrush current suppression circuit contactor (FR-F740-03250 or more) or no fault is
found in the power supply circuit of the contactor.
Check that the power supply circuit of inrush current limit circuit contactor is not
damaged.
Connect an AC reactor.
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.
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 "RS485
communication number of retries" during RS485 communication from the RS485 terminal.
This function also stops the inverter output if communication is broken for the period of time
set in Pr. 336 "RS485 communication check time interval".
Check the RS485 terminal wiring.
Perform wiring of the RS485 terminal properly.
E.AIE
Analog input error
Stops the inverter output when 30mA or higher current is input to terminal 2 or 4 while cur-
rent input is selected with Pr. 73 (Analog input selection) or Pr. 267 (Terminal 4 input selec-
tion). The function also stops the inverter output when voltage (7.5V or higher) is input.
Check the setting of Pr. 73 "Analog input selection" and Pr. 267 "Terminal 4 input selec-
tion".
Either give a frequency command by current input or set Pr. 73 "Analog input selection" or
Pr. 267 "Terminal 4 input selection" to voltage input. (Refer to section 6.15.1.)
FR-PU04 Fault 14
FR-PU07(-01) Inrush overheat
FR-PU04 Fault 14
FR-PU07(-01) VFD Comm error
FR-PU04 Fault 14
FR-PU07(-01) Analog in error
Troubleshooting