Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual page 295

Operation panel
MT
indication
Name Maintenance signal output
Indicates that the cumulative energization time of the inverter has reached a given time.
Description
When the setting of Pr. 504 Maintenance timer alarm output set time is the initial value (Pr. 504 = "9999"), this warning
does not occur.
The Pr. 503 Maintenance timer setting is larger than the Pr. 504 Maintenance timer alarm output set time setting. (Refer to
Check point
page 268).
Corrective action Setting "0" in Pr. 503 Maintenance timer erases the signal.
Operation panel
UV
indication
Name Undervoltage
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 below about 115VAC (about 230VAC for 400V class, about 58VAC for 100V class), this function stops the
Description
inverter output and displays
An alarm is reset when the voltage returns to normal.
Check point
Check that the power supply voltage is normal.
Corrective action Check the power supply system equipment such as power supply.
Operation panel
SA
indication
Safety stop ∗
Name
Description Appears when safety stop function is activated (during output shutoff). (Refer to page 31)
If the indication appears when safety stop function is not used, check that shorting wires between S1 and PC, S2 and
Check point
PC are connected.
When not using the safety stop function, short across terminals S1 and PC and across S2 and PC with shorting
wire for the inverter to run.
Corrective action If
function (drive enabled), internal failure might be the cause. Check the wiring of terminals S1, S2 and PC and
contact your sales representative if the wiring has no fault.
∗ This function is only available for the safety stop function model.
EV
Operation panel
indication
Name
24V external power supply operation
Description Flickers when the main circuit power supply is off and the 24V external power supply is being input.
Check if the 24V external power is supplied.
Check point Check if the power supply for the inverter (main circuit) is ON. Check if the power supply voltage is low.
Check if the jumper between terminal P/+ and P1 is removed.
Turn ON the power supply for the inverter (main circuit).
If
Corrective action
supplied, check the power supply (for the main circuit).
Check if the jumper is installed securely between terminal P/+ and P1.
.......Specifications differ according to the date assembled. Refer to page 338 to check the SERIAL number.
(3) Alarm
When an alarm occurs, the output is not shut off. You can also output an alarm signal by making parameter setting.
(Set "98" in any of Pr. 190 to Pr. 192 (output terminal function selection). Refer to page 145 ).
Operation panel
FN
indication
Name Fan alarm
For the inverter that contains a cooling fan,
Description
an alarm or different operation from the setting of Pr. 244 Cooling fan operation selection.
Check point Check the cooling fan for an alarm.
Corrective action Check for fan alarm. Please contact your sales representative.
FR-PU04
FR-PU07
FR-PU04
FR-PU07
.
FR-PU04
FR-PU07
is indicated when across S1 and PC and across S2 and PC are both shorted while using the safety stop
FR-PU04
FR-PU07
appears by turning ON the power supply of the inverter (main circuit) while the external 24V power is
FR-PU04
FR-PU07
Causes and corrective actions
——
MT
——
——
——
FN
appears on the operation panel when the cooling fan stops due to
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