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Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual Page 299

Fr-e700 series.
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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.
Operation panel
E.LF
indication
Name
Output phase loss
If one of the three phases (U, V, W) on the inverter's output side (load side) is lost during inverter operation (except
Description
during DC injection brake operation and when output frequency is under 1Hz), inverter stops the output. Whether the
protective function is used or not is set with Pr. 251 Output phase loss protection selection.
Check the wiring. (Check that the motor is normal.)
Check point
Check that the capacity of the motor used is not smaller than that of the inverter.
Wire the cables properly.
Corrective action
Check the Pr. 251 Output phase loss protection selection setting.
Operation panel
E.OHT
indication
Name
External thermal relay operation
If the external thermal relay provided for motor overheat protection or the internally mounted temperature relay in the
motor, etc. switches on (contacts open), the inverter output is stopped.
Description
This function is available when "7" (OH signal) is set to any of Pr. 178 to Pr. 184 (input terminal function selection).
This protective function is not available in the initial status (OH signal is not assigned).
Check for motor overheating.
Check point
Check that the value of 7 (OH signal) is set correctly in any of Pr. 178 to Pr. 184 (input terminal function selection).
Reduce the load and frequency of operation.
Corrective action
Even if the relay contacts are reset automatically, the inverter will not restart unless it is reset.
E.OPT
Operation Panel
Indication
Name
Option fault
Description
Appears when a communication option is connected while Pr. 296 = "0 or 100."
Check point
Check if password lock is activated by setting Pr. 296 = "0, 100"
To apply the password lock when installing a communication option, set Pr.296 ≠ "0,100".(Refer to page 191).
Corrective action
If the problem still persists after taking the above measure, please contact your sales representative.
.....
Specifications differ according to the date assembled. Refer to page 338 to check the SERIAL number.
Causes and corrective actions
FR-PU04
Br. Cct. Fault
FR-PU07
FR-PU04
Ground Fault
FR-PU07
FR-PU04
E.LF
FR-PU07
FR-PU04
OH Fault
FR-PU07
FR-PU04
Option Fault
FR-PU07
5
299

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