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Mitsubishi Electric FR-CS84-012 Instruction Manual Page 219

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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
218
6. PROTECTIVE FUNCTIONS
6.5 Causes and corrective actions
E.PUE
PU disconnection
• The inverter output is shut off if communication between the inverter and PU is suspended, e.g. the PU is
disconnected, when the disconnected PU detection function is activated using Pr.75 Reset selection/
disconnected PU detection/PU stop selection.
• The inverter output is shut off if communication errors occurred consecutively for more than permissible
number of retries when Pr.121 PU communication retry count ≠ "9999" during the RS-485 communication via
the PU connector.
• The inverter output is shut off if communication is broken within the period of time set in Pr.122 PU
communication check time interval during the RS-485 communication via the PU connector.
• Check that the PU is connected properly.
• Check the Pr.75 setting.
Connect the PU securely.
E.RET
Retry count excess
The inverter output is shut off if the operation cannot be resumed properly within the number of retries set in Pr.67
Number of retries at fault occurrence. This protective function is available when Pr.67 is set. This protective
function is not available in the initial setting (Pr.67 = "0").
Find the cause of the fault occurrence.
Eliminate the cause of the fault preceding this fault indication.
E.CPU
E. 5
CPU fault
The inverter output is shut off if a communication fault 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.
• Contact your sales representative.
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 function is active when Pr.167 Output current detection operation selection is set to "1." 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, and Pr.167. (Refer to
129.)
E.IOH
Inrush current limit circuit fault
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 that the inrush current limit circuit 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.
FR-LU08 indication
PU disconnection
FR-LU08 indication
Retry count excess
CPU fault
FR-LU08 indication
Error5
FR-LU08 indication
OC detect level
FR-LU08 indication
Inrush overheat
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