Mitsubishi Electric FR-A820-00046 Instruction Manual page 1078

Causes and corrective actions
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
6 - 38
E. 1 to E. 3
Option fault
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.
For the FR-A800-GF, the inverter output is shut off when a connector contact fault or the like
occurs between the CC-Link IE Field Network communication circuit board and the inverter
control circuit board.
Appears when the switch for manufacturer setting of the plug-in option is changed.
Check that the plug-in option is plugged into the connector properly.
(1 to 3 indicate connector numbers for connection of options.)
For the FR-A800-GF, check that the CC-Link IE Field Network communication circuit board is
securely installed to the connector of the inverter control circuit board.
Check for excessive noise around the inverter.
Check if the communication option is connected to the connector 2 or 3.
Connect the plug-in option securely.
Connect the CC-Link IE Field Network communication circuit board of the FR-A800-GF
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.)
E.11
Sensorless Sensorless Sensorless
Opposite rotation deceleration fault
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 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.
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.
to FR-LU-08
FR-LU-08
Protective functions
Fault 1 to Fault 3
Opst rot dtct fault