Mitsubishi Electric fr-e700 series, Инструкция по эксплуатации

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Troubleshooting Causes and corrective actions
FR-E700 SC EC/ENE 7 - 13
햲
Functions only when any of Pr. 178 to Pr. 184 "Input terminal function selection" is set to OH.
Operation panel
indication
E.BE
FR-PU04
FR-PU07
Br. Cct. Fault
Name Brake transistor alarm detection/internal circuit error
Description
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.
In this case, the inverter must be powered off immediately.
Check point
앫
Reduce the load inertia.
앫
heck that the frequency of using the brake is proper.
Corrective action Replace the inverter.
Operation panel
indication
E.GF
FR-PU04
FR-PU07
Ground Fault
Name Output phase failure protection
Description
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) fault detection at start".
Check point Check for an earth fault in the motor and connection cable.
Corrective action Remedy the earth fault portion.
Operation panel
indication
E.LF
FR-PU04
FR-PU07
E.LF
Name Output phase loss
Description
If one of the three phases (U, V, W) on the inverter's output side (load side) is lost during inverter
operation (except during DC injection brake operation and when output frequency is under
1 Hz), inverter stops the output.
Whether the protective function is used or not is set with Pr. 251 "Output phase loss protection
selection".
Check point
앫
Check the wiring (Check that the motor is normal.)
앫
Check that the capacity of the motor used is not smaller than that of the inverter.
Corrective action
앫
Wire the cables properly.
앫
Check the Pr. 251 "Output phase failure protection selection" setting.
Operation panel
indication
E.OHT
FR-PU04
FR-PU07
OH Fault
Name
External thermal relay operation
햲
Description
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.
Functions when "7" (OH signal) is set to any of Pr. 178 to Pr. 184 "Input terminal function
selection".
This protective function does not function in the initial status (OH signal is not assigned).
Check point
앫
Check for motor overheating.
앫
Check that the value of "7" (OH signal) is set correctly in any of Pr. 178 to Pr. 184 "Input
terminal function selection".
Corrective action
앫
Reduce the load and frequency of operation.
앫
Even if the relay contacts are reset automatically, the inverter will not restart unless it is reset.