Mitsubishi Electric FR-A820-00046 Instruction Manual page 1066

Causes and corrective actions
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
6 - 26
E.LDN
Lower limit fault detection
When the load falls below the lower limit fault detection range, the inverter trips. This protective
function is not available in the initial setting of Pr. 1491 (Pr. 1491 = "9999").
Check if the equipment load is too light.
Check that the load characteristics settings are correct.
Inspect the equipment.
Set the load characteristics (Pr. 1481 to Pr. 1487) correctly.
E.BE
Brake transistor alarm detection
The inverter trips if a fault due to damage of the brake transistor and such occurs in the
brake circuit. In such a case, the power supply to the inverter must be shut off
immediately.
Appears when an internal circuit fault occurred for separated converter types and IP55
compatible models.
Reduce the load inertia.
Check that the brake duty is proper.
Replace the inverter.
E.GF
Output side earth (ground) fault overcurrent
The inverter trips if an earth (ground) fault overcurrent flows due to an earth (ground) fault that
occurred on the inverter's output side (load side).
Check for an earth (ground) fault in the motor and connection cable.
Remedy the earth (ground) fault portion.
E.LF
Output phase loss
The inverter trips if one of the three phases (U, V, W) on the inverter's output side (load side) is
lost.
Check the wiring. (Check that the motor is normally operating.)
Check that the capacity of the motor used is not smaller than that of the inverter.
Check if a start command is given to the inverter while the motor is coasting.
(PM sensorless vector control)
Wire the cables properly.
Input a start command after the motor stops. Alternatively, use the automatic restart after
instantaneous power failure/flying start function (page 5-590).
(PM sensorless vector control)
Protective functions
FR-LU08 Lower limit fault
FR-LU-08 Brake transistor err
FR-LU-08 Ground Fault
FR-LU-08 Output phase loss