York LVD 270, Руководство по эксплуатации, Страница: 40 / 46

Table 4: Cycling shutdown message
Message Description
Harmonic Filter - DC Current
Transformer 1 (or 2)
FILTER DCCT 1 (OR 2) ERROR
During initialization, with no current flowing through the Direct Current Current
Transducers (DCCTs), the DCCT’s output voltages are measured and compared
with a preset limit in the harmonic filter logic board. If the measured values
exceed the preset limits, the DCCTs are presumed to be bad and this shutdown
will be generated.
Harmonic Filter - High DC Bus Voltage
FLTR BUS OVER-VOLTAGE FLT
The harmonic filter logic board continuously monitors the harmonic filter DC link
voltage if the level of the DC link voltage exceeds a range of 822 to 900 VDC (for
380 through 460 VAC input voltage) or 999 to 1099 VDC (for 575 VAC input voltage)
this shutdown is initiated. Keep in mind that the harmonic filter has its own DC
Link as part of the harmonic filter power unit. The harmonic filter DC Link is not
connected in any way with the drive’s DC Link.
The output current of the harmonic filter is read by the Direct Current-Current
Transducer (DCCT). This current information is sent to the harmonic filter logic
board where it is compared against a threshold. If the output current of the
harmonic filter power unit is greater than the threshold, then the harmonic filter
will turn off for 5-6 line cycles. After that time the filter operation will resume. If
the harmonic filter operation is stopped 3 times within a period of 60 line cycles,
then the filter and VSD power units are shut down and this message is generated.
Drive hp rating Threshold shutdown value
270, 292, 351, 424 378 Amps Peak
385, 419, 503, 608 (575 VAC) 523 Amps Peak
608 (400 VAC), 658, 704, 790 781 Amps Peak
Harmonic Filter - High Phase A (or B,
C) Current
FLTR PHASE A (B, C) OVERCURRENT
868, 882, 914, 917, 948, 1055 1225 Amps Peak
Harmonic Filter Communications
IEEE-519 FILTER FAULT
This shutdown states that the hardware on the harmonic filter logic board is
indicating a fault, but the software on the harmonic filter logic board does not
state why. The harmonic filter logic board signals a fault condition to the OSCD
logic board but does not respond to a software request for fault information.
Harmonic Filter - Logic Board Power
Supply
FLTR POWER SUPPLY FLT
This shutdown indicates that one of the low voltage power supplies on the
harmonic filter logic board have dropped below their permissible operating
voltage range. The harmonic filter logic board receives its power from the OSCD
logic board. The power supplies for the OSCD logic board are in turn derived from
the secondary of the 120 VAC to 24 VAC transformer.
Harmonic Filter - Low DC Bus Voltage
FLTR LOW BUS VOLTAGE FLT
The harmonic filter dynamically generates its own filter DC link voltage by the
interaction of the harmonic filter inductor and switching its transistors. This DC
level is actually higher than the level obtained by simply rectifying the input line
voltage.
Note: The DC link voltage is always higher on the harmonic filter power unit
then on the OSCD VSD power unit.
Thus the harmonic filter actually performs a voltage “boost” function. This is
necessary in order to permit current to flow into the AC line from the harmonic
filter when the AC line is at its peak level. This particular shutdown and its
accompanying message are generated when the harmonic filter’s DC link voltage
drops to a level less than 80 VDC (for 380 through 460 VAC input voltage), 110 VDC
(for 424 HP) and 140 VDC (for 575 VAC input voltage 608 HP) below the harmonic
filter DC link voltage setpoint.
Harmonic Filter - Phase Locked Loop
FLTR PHASE LOCK LOOP FLT
This shutdown indicates that a circuit called a “phase locked loop” on the
harmonic filter logic board has lost synchronization with the incoming power line
for a period of time.
Liquid-Cooled OptiSpeed Compressor Speed Drive 40