Mitsubishi Electric FR-A800, Instruction Manual

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Protective functions Causes and corrective actions
FR-A800 6 - 35
Operation panel
indication
E. 1 to E. 3 to FR-LU-08 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
앫
Check that the plug-in option is plugged into the connector properly.
(1 to 3 indicate connector numbers for connection of options.)
앫
Check for excessive noise around the inverter.
앫
Check if the communication option is connected to the connector 2 or 3.
Corrective action
앫
Connect the plug-in option securely.
앫
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.
앫
Connect the communication option to the connector 1.
앫
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.)
Operation panel
indication
E.11
FR-LU-08 Fault 11
Name Internal circuit 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
앫
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
앫
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.
앫
Please contact your sales representative.
NOTES If protective functions with indication of "Fault" are activated when using the FR-PU07, "ERR"
appears in the faults history of FR-PU07.
If faults other than the above appear, contact your sales representative.
Sensorless Sensorless Sensorless