Fuji Electric RHC-D 690V Series, Руководство пользователя

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7 Troubleshooting
7.1 List of Protective Functions
When resetting the alarm stop state, be sure to check that a run signal is OFF beforehand. Resetting it with the
RUN and CM being short-circuited may cause a sudden restart.
Accidents may result.
If an alarm occurs in the converter, the converter activates the protective function to immediately stop (trip) itself
and displays an alarm code on the LED monitor. Remove the cause that has activated the protective function or
replace faulty parts, and then enter a reset command to cancel the protective function and restart converter operation.
Even if a reset command is entered without removal of the alarm cause, the protective function cannot be canceled.
For the description of alarms, refer to Table 7.1-1.
Table 7.1-1 Alarm Indication and List of Protective Functions
Name of alarm Indication Description
AC overcurrent AOC
The momentary AC current has exceeded the overcurrent detection level due to
a short circuit or grounding fault in the power supply circuit.
AC undervoltage ALV
The source AC voltage has dropped below the undervoltage detection level
during converter operation.
Note that no alarm is issued when F02 (Restart Mode After Momentary Power
Failure) = 1.
AC undervoltage detection level (350 Vrms)
AC input current error ACE
The difference between the current reference value of the converter and the
detected input AC power value has exceeded the input current error detection
level.
Note that no alarm is issued when F02 (Restart Mode After Momentary Power
Failure) = 1.
AC overvoltage AOV
The source AC voltage has exceeded the AC overvoltage detection level.
AC overvoltage detection level (828 Vrms)
DC overvoltage dOV
The regenerative current of the inverter has increased (until the regenerative
energy has exceeded the braking capacity) so that the DC link bus voltage has
exceeded the DC overvoltage detection level.
DC overvoltage detection level (1230 Vdc)
DC undervoltage dLV
The DC link bus voltage has dropped below the undervoltage detection level
due to a voltage drop of the power supply during converter operation.
Note that no alarm is issued when F02 (Restart Mode After Momentary Power
Failure) = 1.
DC undervoltage detection level (540 Vdc)
Input phase loss LPV
This function works immediately after the power is turned ON.
The converter has stopped due to a phase loss in the three-phase power supply
connected to main power inputs L1/R, L2/S and L3/T or an interphase voltage
unbalance in the three-phase source voltage.
To reset the alarm state, restart the converter.
7-1