Mitsubishi Electric 800 Series Instruction Manual page 643

Causes and corrective actions
Abbreviation
Name
Description
Check point
Corrective action
Abbreviation
Name
Description
Check point
Corrective action
Abbreviation
Name
Description
Check point
Corrective action
Abbreviation
Name
Description
Check point
Corrective action
Abbreviation
Name
Description
Check point
Corrective action
Abbreviation
Name
Description
Check point
Corrective action
642
PROTECTIVE FUNCTIONS
E.PE
Parameter storage device fault (control circuit board)
The inverter trips if a fault occurs in the parameter stored. (EEPROM failure)
Check for too many number of parameter write times.
Please contact your sales representative.
Set "1" in Pr.342 Communication EEPROM write selection(write to RAM) for the operation which requires
frequent parameter writing via communication, etc. Note that writing to RAM goes back to the initial status at
power OFF.
E.PUE
PU disconnection
• The inverter trips if communication between the inverter and PU is suspended, e.g. the operation panel or
parameter unit is disconnected, when the disconnected PU disconnection function is valid in Pr.75 Reset
selection/disconnected PU detection/PU stop selection .
• The inverter trips if communication errors occurred consecutively for more than permissible number of
retries when Pr.121 Number of PU communication retries ≠ "9999" during the RS-485 communication.
• The inverter trips 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 operation panel or the parameter unit is connected properly.
• Check the Pr.75 setting.
Fit the operation panel or the parameter unit securely.
E.RET
Retry count excess
The inverter trips if the operation cannot be resumed properly within the number of retries set in Pr.67
Number of retries at fault occurrence.
Find the cause of the fault occurrence.
Eliminate the cause of the error preceding this error indication.
E.PE2
Parameter storage device fault (main circuit board)
The inverter trips if a fault occurs in the parameter stored. (EEPROM failure)
Please contact your sales representative.
E.CPU
E. 5 to E. 7
CPU fault
The inverter trips if the 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.
• Please contact your sales representative.
E.CTE
Operation panel power supply short circuit/RS-485 terminals power supply short circuit
• When the power supply for the operation panel (PU connector) is shorted, the power output is shutoff and
the inverter trips. The use of the operation panel (parameter unit) and the RS-485 communication via the PU
connector are disabled. To reset, enter the RES signal from the terminal, reset via communication through
the RS-485 terminals, or switch power OFF then ON again.
• When the power supply for the RS-485 terminals are short circuited, this function shuts off the power output.
At this time, communication from the RS-485 terminals cannot be made. To reset, use
operation panel, enter the RES signal, or switch power OFF then ON again.
• Check that the PU connector cable is not shorted.
• Check that the RS-485 terminals are connected correctly.
• Check PU and the cable.
• Check the connection of the RS-485 terminals.
FR-LU08 Corrupt Memory
FR-PU07 Corrupt Memry
FR-LU08
PU Leave Out
FR-PU07
FR-LU08
Retry No Over
FR-PU07
FR-LU08
PR storage alarm
FR-PU07
—————
CPU Fault
FR-LU08
FR-PU07
Fault 5 to Fault 7
FR-LU08 Circuit fault
FR-PU07 E.CTE
on the