Mitsubishi Electric 800 Series, Instruction Manual, Page: 648 / 727

Causes and corrective actions
PROTECTIVE FUNCTIONS
647
6 5
 Others
Indicate the status of the inverter. It is not a fault.
NOTE
• If protective functions with indication of "Fault" on the operation panel or parameter unit are activated, "ERR" appears in the
fault history of the operation panel or parameter unit.
• If faults other than the above appear, contact your sales representative.
Abbreviation E. 1 to E. 3
FR-LU08
FR-PU07
Fault 1 to Fault 3
Name
Option fault
Description
The inverter trips when a contact fault is found between the inverter and the plug-in option, or when the
communication option is not connected to the connector 1.
Appears when the switch for manufacturer setting of the plug-in option is changed.
Check point
• Check that the plug-in option is plugged into the connector properly.
(1 to 3 indicate connector numbers for connection of options.)
• Check for excessive noise around the inverter.
• Check if the communication option is connected to the connector 2 or 3.
Corrective action
• Connect the plug-in option securely.
• Take measures against noises if there are devices producing excess electrical noises around the inverter.
If the situation does not improve after taking the above measure, please contact your sales representative.
• Connect the communication option to the connector 1.
• Set the switch on the plug-in option, which is for manufacturer setting, back to the initial setting. (Refer to the
Instruction Manual of each option.)
Abbreviation
E.11
FR-LU08
FR-PU07
Fault 11
Name
Opposite rotation deceleration fault
Description
The speed may not decelerate during low speed operation if the rotation direction of the speed command and
the estimated speed differ when the rotation is changing from forward to reverse or from reverse to forward
during torque control under Real sensorless vector control. The inverter trips when overload occurs due to
the un-switched rotation direction. This protective function is not available in the initial status (V/F control).
(This function is only available under Real sensorless vector control.)
Check point
• Check that the rotation direction is not switched from forward to reverse rotation (or from reverse to forward)
during torque control under Real sensorless vector control.
Corrective action
• Prevent the motor from switching the rotation direction from forward to reverse (or from reverse to forward)
during torque control under Real sensorless vector control.
• Please contact your sales representative.
Abbreviation E.0 FR-LU08 No faults
Name
No fault history
Description
Appears when no fault records are stored. (Appears when the fault history is cleared after the protective
function has been activated.)
Abbreviation RD
Name
Backup in progress
Description
The GOT is used for backing up inverter parameters and the data used in the PLC function of inverter. (Refer
to
page 586 .)
Abbreviation WR
Name
Restoration in progress
Description
The backup data stored in the GOT is used to restore the data in the inverter. (Refer to page 586 .)
Sensorless Sensorless Sensorless