Mitsubishi Electric FR-D700 Series, Инструкция по эксплуатации

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252
Causes and corrective actions
Operation panel
indication
E.GF
FR-PU04
FR-PU07
Ground Fault
Name Output side earth (ground) fault overcurrent at start
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 a ground fault in the motor and connection cable.
Corrective action
Remedy the ground fault portion.
Operation panel
indication
E.LF
FR-PU04
FR-PU07
E.LF
Name Output phase loss
Description
This function stops the inverter output if one of the three phases (U, V, W) on the inverter's output side (load side) is
lost. Whether the protective function is used or not is set with
Pr. 251 Output phase loss protection selection .
Check point
Check the wiring. (Check that the motor is normal.)
Check that the capacity of the motor used is not smaller than that of the inverter.
Corrective action
Wire the cables properly.
Check the
Pr. 251 Output phase loss protection selection settting.
Operation panel
indication
E.OHT
FR-PU04
FR-PU07
OH Fault
Name
External thermal relay operation
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. 182 (input terminal function selection) .
This protective function does not function in the initial status (OH signal is not assigned).
Check point
Check for motor overheating.
Check that the value of 7 (OH signal) is set correctly in any of
Pr. 178 to Pr. 182 (input terminal function selection) .
Corrective action
Reduce the load and frequency of operation.
Even if the relay contacts are reset automatically, the inverter will not restart unless it is reset.
Operation panel
indication
E.PTC
FR-PU04 Fault 14
FR-PU07 PTC activated
Name PTC thermistor operation
Description
Inverter trips when resistance of PTC thermistor connected between terminal 2 and terminal 10 is more than the
value set in
Pr. 561 PTC thermistor protection level . This protective function does not function when Pr. 561 setting is
initial value ( Pr. 561 = "9999").
Check point
Check the connection of the PTC thermistor.
Check the
Pr. 561 PTC thermistor protection level setting.
Check the motor for operation under overload.
Corrective action
Reduce the load weight.
Operation panel
indication
E.PE
FR-PU04
FR-PU07
Corrupt Memry
Name Parameter storage device fault (control circuit board)
Description Appears when a fault occurred in the stored parameters. (EEPROM fault)
Check point
Check for too many number of parameter write times.
Corrective action
Please contact your sales representative.
When performing parameter write frequently for communication purposes, set "1" in
Pr. 342 to enable RAM write. Note
that powering off returns the inverter to the status before RAM write.