Mitsubishi Electric FR-A800 Series Instruction Manual page 795

Operation panel
indication
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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
794
6. PROTECTIVE FUNCTIONS
6.5 Causes and corrective actions
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E.CDO
Abnormal output current detection
The inverter output is shut off if the output current exceeds the Pr.150 Output current detection level setting.
This functions is available when "1" is set in Pr.167 Output current detection operation selection. When the
initial value (Pr.167 = "0") is set, this protective function is not available.
Check the settings of Pr.150, Pr.151 Output current detection signal delay time, Pr.166 Output current
detection signal retention time, and Pr.167. (Refer to
E.IOH
Inrush current limit circuit fault (Standard models and IP55 compatible models only)
The inverter output is shut off when the resistor of the inrush current limit circuit is overheated. The inrush current
limit circuit is faulty.
• Check that frequent power ON/OFF is not repeated.
• Check if the input side fuse (5A) in the power supply circuit of the inrush current limit circuit contactor (FR-A840-
03250(110K) or higher) is blown.
• 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, contact your sales representative.
E.SER
Communication fault (inverter)
The inverter output is shut off when communication error occurs consecutively for the permissible number of
retries or more when Pr.335 RS-485 communication retry count ≠ "9999" during RS-485 communication
through the RS-485 terminals. The inverter output is also shut off 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 fault
The inverter output is shut off when a 30 mA or higher current or a 7.5 V or higher voltage is input to terminal 2
while the current input is selected by Pr.73 Analog input selection, or to terminal 4 while the current input is
selected by Pr.267 Terminal 4 input selection.
Check the Pr.73, Pr.267, and the voltage/current input switch settings. (Refer to
Either give a current less than 30 mA, or set Pr.73, Pr.267, and the voltage/current input switch to the voltage
input and input a voltage.
E.USB
USB communication fault
The inverter output is shut off when the communication is cut off for the time set in Pr.548 USB communication
check time interval.
• Check that the USB communication cable is connected securely.
• Check the Pr.548 setting.
• Connect the USB communication cable securely.
• Increase the Pr.548 setting or set "9999." (Refer to
search engine
FR-LU08 indication OC detect level
page 487.)
FR-LU08 indication Inrush overheat
FR-LU08 indication VFD Comm error
FR-LU08 indication Analog input fault
page
FR-LU08 indication USB comm error
page 701.)
496.)