Mitsubishi Electric FR-E720-600 Instruction Manual page 279

Operation panel
E.FIN
indication
Name
Fin overheat
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
Description
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 to Pr. 192 (output terminal function selection). (Refer to page 137).
1. Check for too high ambient temperature.
2. Check for heatsink clogging.
Check point
3. Check that the cooling fan is not stopped (Check that
1. Set the ambient temperature to within the specifications.
Corrective action
2. Clean the heatsink.
3. Replace the cooling fan.
Operation panel
E.ILF
indication
Name
Input phase loss
This fault is output when function valid setting (=1) is set in Pr. 872 Input phase loss protection selection and one phase
Description
of the three phase power input is lost. (Refer to page 164).
Check point Check for a break in the cable for the three-phase power supply input.
Wire the cables properly.
Corrective action Repair a brake portion in the cable.
Check the Pr. 872 Input phase loss protection selection setting.
Operation panel
E.OLT
indication
Name
Stall prevention
If the output frequency has fallen to 1Hz by stall prevention operation and remains for 3s, a fault (E.OLT) appears and
Description
trips the inverter. OL appears while stall prevention is being activated.
Check point
Check the motor for use under overload. (Refer to page 86).
Corrective action Reduce the load weight. Check the Pr. 22 Stall prevention operation level setting.
Operation panel
E.BE
indication
Name Brake transistor alarm detection
When a brake transistor alarm has occurred due to the large regenerative energy from the motor etc., the brake
transistor alarm is detected and the inverter trips.
Description
In this case, the inverter must be powered off immediately.
Reduce the load inertia.
Check point
Check that the frequency of using the brake is proper.
Corrective action
Replace the inverter.
Operation panel
E.GF
indication
Name Output side earth (ground) fault overcurrent at start
The inverter trips if an earth (ground) fault overcurrent flows at start due to an earth (ground) fault that occurred on
the inverter's output side (load side).Whether this protective function is used or not is set with Pr. 249 Earth (ground)
Description
fault detection at start . When the setting of Pr. 249 Earth (ground) fault detection at start is the initial value (Pr. 249 ="0"),
this warning does not occur.
Check point Check for a ground fault in the motor and connection cable.
Corrective action
Remedy the ground fault portion.
Causes and corrective actions
FR-PU04
H/Sink O/Temp
FR-PU07
is not displayed on the operation panel).
FR-PU04 Fault 14
FR-PU07 Input phase loss
FR-PU04
Stll Prev STP (OL shown during stall prevention operation)
FR-PU07
FR-PU04
Br. Cct. Fault
FR-PU07
FR-PU04
Ground Fault
FR-PU07
5
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