Mitsubishi Electric FR-A820-00046 Instruction Manual page 1057

Protective functions
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
FR-A800
MT1 to MT3
Maintenance signal output 1 to 3
Appears when the inverter's cumulative energization time reaches or exceeds the parameter set
value. Set the time until the MT is displayed using Pr. 504 "Maintenance timer 1 warning output
set time" (MT1), Pr. 687 "Maintenance timer 2 warning output set time" (MT2), and Pr. 689
"Maintenance timer 3 warning output set time" (MT3).
MT does not appear when the settings of Pr. 504, Pr. 687, and Pr. 689 are initial values (9999).
The set time of maintenance timer has been exceeded. (Refer to page 5-235.)
Take appropriate countermeasures according to the purpose of the maintenance timer setting.
Setting "0" in Pr. 503 "Maintenance timer 1", Pr. 686 "Maintenance timer 2", and Pr. 688
"Maintenance timer 3" clears the indication.
UF
USB host error
Appears when an excessive current flows into the USB A connector.
Check if a USB device other than a USB memory device is connected to the USB A connector.
If a device other than a USB memory device is connected to the USB A connector, remove
the device.
Setting Pr. 1049 "USB host reset "= "1" or inverter reset clears the UF indication.
HP1 to HP3
Home position return error
Appears when an error occurs during the home position return operation under position
control. For the details, refer to page 5-173.
Identify the cause of the error occurrence.
Check the parameter setting, and check that the input signal is correct.
LDF
Load fault warning
Appears when the load is deviated from the detection width set in Pr.1488 "Upper limit warning
detection width" or Pr.1489 "Lower limit warning detection width".
Check if too much load is applied to the equipment, or if the 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.
Causes and corrective actions
to
FR-LU-08
FR-LU-08
to
FR-LU-08
FR-LU08
MT1 to MT3
UF
HP1 to HP3
LDF
6 - 17