Mitsubishi FR-A800

Causes and corrective actions
658
PROTECTIVE FUNCTIONS
Operation panel
indication
E.PE FR-PU07 Corrupt Memory
Name
Parameter storage device fault (control circuit board)
Description
The inverter trips if a fault occurs in the parameter stored. (EEPROM failure)
Check point
Check for too many number of parameter write times.
Corrective action
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.
Operation panel
indication
E.PUE FR-PU07 PU Leave Out
Name
PU disconnection
Description
• 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 point
• Check that the operation panel or the parameter unit is connected properly.
• Check the Pr.75 setting.
Corrective action
Fit the operation panel or the parameter unit securely.
Operation panel
indication
E.RET FR-PU07 Retry No Over
Name
Retry count excess
Description
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.
Check point
Find the cause of the fault occurrence.
Corrective action
Eliminate the cause of the error preceding this error indication.
Operation panel
indication
E.PE2 FR-PU07 PR storage alarm
Name
Parameter storage device faultParameter storage device fault (main circuit board)
Description
The inverter trips if a fault occurs in the parameter stored. (EEPROM failure)
Check point
—————
Corrective action
Please contact your sales representative.
Operation panel
indication
CPU
FR-PU07
CPU Fault
E. 5 Fault 5
E. 6 Fault 6
E. 7 Fault 7
Name
CPU fault
Description
The inverter trips if the communication fault of the built-in CPU occurs.
Check point
Check for devices producing excess electrical noises around the inverter.
Corrective action
• Take measures against noises if there are devices producing excess electrical noises around the inverter.
• Please contact your sales representative.