Mitsubishi Electric FR-A800, Instruction Manual

Page: 916 / 1042

Causes and corrective actions Protective functions
6 - 28
Operation panel
indication
E.PUE FR-LU-08 PU disconnection
Name PU disconnection
Description
앫
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".
앫
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.
앫
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
앫
Check that the operation panel or the parameter unit is connected properly.
앫
Check the Pr. 75 setting.
Corrective action Fit the operation panel or the parameter unitsecurely.
Operation panel
indication
E.RET FR-LU-08 Retry count excess
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-LU-08 PR storage alarm
Name Parameter 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-LU-08
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
앫
Take measures against noises if there are devices producing excess electrical noises around
the inverter.
앫
Please contact your sales representative.