Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 749

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
Operation panel
indication
Name
Description
Check point
Corrective action
 Alarm
Output is not shut off when a protective function is activated. An Alarm signal can also be output with a parameter setting.
(Set "98" in Pr.190 to Pr.196 (Output terminal function selection). Refer to
Operation panel
indication
Name
Description
Check point
Corrective action
750
6. PROTECTIVE FUNCTIONS
6.5 Causes and corrective actions
MT1 to MT3
Maintenance signal output
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
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 298.
Identify the cause of the error occurrence.
Check the parameter setting, and check that the input signal is correct.
CF
Continuous operation during communication fault
Appears when the operation continues while an error is occurring in the communication line or communication
option (when Pr.502 = "4").
• Check for a break in the communication cable.
• Check for communication option faults.
• Check the connection of communication cable.
• Replace the communication option.
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.
FN
Fan alarm
For the inverter that contains a cooling fan, FN appears on the operation panel when the cooling fan stops due
to a fault, low rotation speed, or different operation from the setting of Pr.244 Cooling fan operation selection.
Check the cooling fan for a failure.
The fan may be faulty. Contact your sales representative.
to
FR-LU08 indication MT1 to MT3
page 345.)
FR-LU08 indication UF
to
FR-LU08 indication HP1 to HP3
FR-LU08 indication CF
FR-LU08 indication LDF
page 450.)
FR-LU08 indication FN