Mitsubishi Electric 800 Series Instruction Manual page 22

 Incorrect parameter setting
Operation panel
indication
Description
Check point
Corrective action
Reference
 Undervoltage
Operation panel
indication
Description
Check point
Corrective action
 Alarm
Output is not shut off when a protective function is activated. The Alarm (LF) signal can be output depending on the parameter
setting. (Set "98" in Pr.190 to Pr.196 (Output terminal function selection). Refer to the FR-E800 Instruction Manual
(Function).)
 Fan alarm
Operation panel
indication
Description
Check point
Corrective action
 Fault
When a protective function is activated, the inverter output is shut off and a Fault signal is output.
21
2. Protective Functions
2.5 Causes and corrective actions
SE
Appears when the combination of setting values of Pr.451 and Pr.800 is incorrect, and the inverter output is shut
off.
Check that the combination of the control method and the control mode is correct.
Set the control method and the control mode (Pr.451 and Pr.800) correctly.
FR-E800 Instruction Manual (Function)
UV
If the power supply voltage of the inverter decreases, the control circuit will not perform normal functions. In
addition, the motor torque will be insufficient and/or heat generation will increase. To prevent this, if the power
supply voltage decreases to about 115 VAC (230 VAC for the 400 V class, 330 VAC for the 575 V class) or below,
this function shuts off the inverter output and "UV" is displayed. The warning is removed when the voltage returns
to normal.
Check that the power supply voltage is normal.
Check the devices on the power system such as the power supply itself.
FN
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.