11.9 High Power Factor Power Supply Regeneration PWM Converters (RHC Series)
11-34
■ Protective functions
This is activated when the external AC fuse blows due to shorting or damage to the internal
circuit.
If using this function, an option or AC fuse with microswitch is required.
This is activated if the AC power supply voltage exceeds the AC overvoltage detection level.
AC overvoltage detection level (200V series: 276 Vrms, 400V series: 552 Vrms)
This is activated if the AC power supply voltage drops to the undervoltage detection level or
below during operation.
However, no alarm is output when "F02: Restart mode after momentary power failure (mode
selection)" data is set to 1 (Operation). AC undervoltage detection level (200V series: 88 Vrms,
400V series: 176 Vrms)
This is activated if the AC current instantaneous value exceeds the overcurrent detection level
such as when a power supply circuit short circuit or ground fault occurs.
This alarm is issued when the difference between the converter current command value and input
AC current detection value exceeds the input current error detection level.
However, no alarm is output when "F02: Restart mode after momentary power failure (mode
selection)" data is set to 1 (Operation).
This is activated when the power is turned ON, and if there is a phase interruption at the three-
phase power supply connected to main circuit main power supply input terminals L1/R, L2/S, and
L3/T, or if the three-phase power supply voltage is unbalanced, an alarm stop will occur at the
converter. It is necessary to turn the power OFF and ON again to reset the alarm.
Synchronous power frequency error
This is activated when the power supply frequency detection value lies outside the 46 to 54 Hz or
56 to 64 Hz range (only when power ON), or a frequency of ±15% or more of the reference
frequency (50/60 Hz) is detected (when run command input).
However, no alarm is output when "F02: Restart mode after momentary power failure (mode
selection)" data is set to 1 (Operation).
This is activated if the converter output is equipped with a DC fuse, and the DC fuse blows due to
shorting or damage to the internal circuit.
(200 V 75 kW or higher, 400 V 90 kW or higher)
This is activated at such times as when regenerative current from the inverter increases
(regenerative energy exceeds braking capability), and the main circuit intermediate voltage
exceeds the DC overvoltage detection level.
DC overvoltage detection level (200V series: 405 VDC, 400V series: 820 VDC)
This is activated if the intermediate DC voltage drops to the insufficient voltage detection level or
below due to such reasons as a drop in the power supply voltage during converter operation.
However, no alarm is output when "F02: Restart mode after momentary power failure (mode
selection)" data is set to 1 (Operation).
DC undervoltage detection level (200V series: 186 VDC, 400V series: 371 VDC)
This is activated if 73 answerback [73ANS] is selected with the X-terminal function selection. This
is activated if there is no X-terminal input (electromagnetic contactor for bypassing charging
circuit is closed) within 0.5 sec after the converter charging circuit control output [73A] signal is
issued.
To reset the alarm, change the X-terminal function selection, or turn the power OFF and back ON
again.
This is activated when the temperature around the cooling fins used to cool main circuit
semiconductor devices rises due to such reasons as cooling fan stoppage.
A converter alarm stoppage occurs when an external signal is input (THR).
Converter internal
overheat
This is activated when the temperature around the control PCB rises due to reasons such as poor
ventilation inside the converter.
This is activated if the AC power supply current exceeds the converter overload level for the anti-
time limit characteristic.
MD (CT): 150%/60 s, LD (VT): 120%/60 s
This alarm is issued when the DC fan stops. (200 V 45 kW or higher, 400 V 75 kW or higher)
This is activated if a memory error such as a data write error occurs.
Keypad communication error
This is activated if a keypad transfer error occurs.
If this alarm is displayed on the touch panel, the converter unit does not output a batch alarm.
This function is activated if a CPU error occurs.
This is activated when a transmission error occurs due to noise, etc. while the converter is
running with RS-485 communication, CC-Link, T-Link, SX-bus, or E-SX bus.
It is activated by a PLC device error, communication line disconnection, or option alarm.
Operating procedure mistake
This is activated when multiple network options (T-Link, SX-bus, CC-Link) are installed.
Operation stops when an error occurs in the A/D converter circuit.
This function is activated when a transmission error occurs during communication between RHC
units using a high-speed serial communication terminal block (option).
Triggered when an error occurs at the LSI on the power supply PCB.
A simulated alarm state can be produced by keypad operation.
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