Mitsubishi Electric FR-F700PJ Series, Инструкция по эксплуатации

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Causes and corrective actions
Operation panel
indication
E.FIN
FR-PU04
FR-PU07
H/Sink O/Temp
Name
Heatsink overheat
Description
If the heatsink overheats, the temperature sensor is actuated and the inverter trips.
The FIN signal can be output when the temperature becomes approximately 85% of the heatsink overheat protection
operation temperature.
For the terminal used for the FIN signal output, assign the function by setting "26 (positive logic) or 126 (negative
logic)" in any of
Pr. 190 or Pr. 192 (output terminal function selection) . (Refer to page 140)
Check point
 Check for too high surrounding air temperature.
 Check for heatsink clogging.
 Check that the cooling fan is not stopped (Check that is not displayed on the operation panel).
Corrective action
 Set the surrounding air temperature to within the specifications.
 Clean the heatsink.
 Replace the cooling fan.
Operation panel
indication
E.UVT
FR-PU04
FR-PU07
Under Voltage
Name
Undervoltage
Description
This function activates when the restart operation is repeatedly unsuccessful because the power supply voltage of
the inverter has dropped.
Check point
Check if the power supply voltage is appropriate.
Corrective action
Investigate the devices on the power supply line such as the power supply itself.
Operation panel
indication
E.ILF
FR-PU04 Fault 14
FR-PU07 Input phase loss
Name Input phase loss
Description
Inverter trips when function valid setting (=1) is selected in Pr. 872 Input phase loss protection selection and one phase of
the three phase power input is lost.
(Refer to page 172)
It may may be activated if phase-to-phase voltage of the three-phase power input becomes largely unbalanced.
When the setting of
Pr. 872 Input phase loss protection selection is the initial value ( Pr. 872 ="0"), this warning does not
occur.
Check point
 Check for a break in the cable for the three-phase power supply input.
 Check that phase-to-phase voltage of the three-phase power input is not largely unbalanced.
Corrective action
 Wire the cables properly.
 Repair a break portion in the cable.
 Check the Pr. 872 Input phase loss protection selection setting.
 Set Pr. 872 = "0" (without input phase loss protection) when three-phase input voltage is largely unbalanced.
Operation panel
indication
E.OLT
FR-PU04
FR-PU07
Stll Prev STP
Name Stall prevention stop
Description
If the output frequency has fallen to 1Hz (1.5Hz under IPM motor control) by stall prevention operation and remains
for 3s, a fault (E.OLT) appears and the inverter trips. OL appears while stall prevention is being activated.
E.OLT may not occur if stall prevention (OL) is activated during output phase loss.
Check point
 Check the motor for use under overload. (Refer to page 97)
 Check that a motor is connected during IPM motor control. (IPM motor control)
 Check if a start command is given to the inverter while the motor is coasting. (IPM motor control)
Corrective action
 Reduce the load weight. (Check the Pr. 22 Stall prevention operation level setting.)
 Check the connection of the IPM motor. (IPM motor control)
 Set the IPM motor test operation. (Refer to page 88 )
 Input a start command after the motor stops. Alternatively, set the automatic restart after instantaneous power
failure/flying start function.
(IPM motor control)
(Refer to page 161.)
Operation panel
indication
E.SOT FR-PU04 Fault 14
FR-PU07 Motor step out
Name Loss of synchronism detection
Description
Stops the output when the operation is not synchronized. (This function is only available under IPM motor control.)
Check point
 Check that the IPM motor is not driven overloaded.
 Check if a start command is given to the inverter while the IPM motor is coasting.
 Check if a motor other than the IPM motor (MM-EF series) is driven.
Corrective action
 Set the acceleration time longer.
 Reduce the load.
 If the inverter restarts during coasting, set Pr.57 Restart coasting time

"9999," and select the automatic restart after
instantaneous power failure.
 Drive the IPM motor (MM-EF series).
IPM IPM IPM
IPM IPM IPM