QUANTUM™ HD COMPRESSOR CONTROL PANEL
OPERATION
090.040-O (MAR 12)
Page 150
the unit’s internal ambient temperature. The magni-
tude of the unit’s internal temperature is compared to
a limit of 145°F. If this limit is exceeded the unit will
trip and the Quantum™ HD panel will display this mes-
sage. The fan(s) and water pump remain energized
until the internal temperature drops below 137°F. The
fan(s) and water pump will be de-energized when the
internal temperature drops below 137°F.
VSD High Inverter Baseplate Temp Fault – A therm-
istor sensor is located inside the IGBT Module on
the Vyper™ power unit. If this thermistor detects a
temperature of 175°F (79°C) or higher, a shutdown
will occur. The cooling fans and coolant pump on the
Vyper™ will continue to run after the shutdown, un-
til the thermistor temperature has dropped to below
165°F (74°C). This shutdown requires a manual reset
via the Reset push button on the Vyper ™ logic board.
VSD High Phase A Instantaneous Current – Phase
A of the output line to the motor is monitored via a
current transformer within the drive. The unit’s Phase
A of instantaneous output current is compared to a
prescribed limit which is contained in the hardware.
If the peak current limit is exceeded, the unit will trip
and the Quantum™ HD Panel will display this mes-
sage.
VSD High Phase B Instantaneous Current – Phase
B of the output line to the motor is monitored via a
current transformer within the drive. The unit’s Phase
B of instantaneous output current is compared to a
prescribed limit which is contained in the hardware.
If the peak current limit is exceeded, the unit will trip
and the Quantum™ HD Panel will display this mes-
sage.
VSD High Phase C Instantaneous Current – Phase
C of the output line to the motor is monitored via a
current transformer within the drive. The unit’s Phase
C of instantaneous output current is compared to a
prescribed limit which is contained in the hardware.
If the peak current limit is exceeded, the unit will trip
and the Quantum™ HD Panel will display this mes-
sage.
VSD High Phase A Inverter Baseplate Temp – A
thermistor sensor is located inside the IGBT Module
on the Vyper™ power unit. If this thermistor detects
a temperature of 175°F (79°C) or higher of the Phase
A Inverter, a shutdown will occur. The cooling fans
and coolant pump on the Vyper™ will continue to run
after the shutdown, until the thermistor temperature
has dropped to below 165°F (74°C). This shutdown
requires a manual reset via the Reset push button on
the Vyper™ logic board.
VSD High Phase B Inverter Baseplate Temp – A
thermistor sensor is located inside the IGBT Module
on the Vyper™ power unit. If this thermistor detects
a temperature of 175°F (79°C) or higher of the Phase
B Inverter, a shutdown will occur. The cooling fans
and coolant pump on the Vyper™ will continue to run
after the shutdown, until the thermistor temperature
has dropped to below 165°F (74°C). This shutdown
requires a manual reset via the Reset push button on
the Vyper™ logic board.
VDS High Phase C Inverter Baseplate Temp – A
thermistor sensor is located inside the IGBT Module
on the Vyper™ power unit. If this thermistor detects
a temperature of 175°F (79°C) or higher of the Phase
C Inverter, a shutdown will occur. The cooling fans
and coolant pump on the Vyper™ will continue to run
after the shutdown, until the thermistor temperature
has dropped to below 165°F (74°C). This shutdown
requires a manual reset via the Reset push button on
the Vyper™ logic board.
VSD Initialization Fault - At power-up, all the boards
go through a process called initialization. At this time,
memory locations are cleared, jumper positions are
checked, and serial communications links are estab-
lished.
VSD Invalid Current Scale Selection – The J1 con-
nector on the Vyper™ Logic board contains jumpers
along with wires from the output CTs. Since the part
number of the Logic board is the same on all horse-
power sizes, the jumpers tell the logic board the size
of the Vyper™ being employed in order to properly
scale the output current. If the jumper confi guration
is found by the Logic board to be invalid, the sys-
tem will be shut down and the above message will
be generated.
VSD Logic Board Power Supply Fault – The various
DC power supplies which power the Logic Board are
monitored via hardware located on the Logic Board.
If any of these power supplies fall outside their allow-
able limits, the unit will trip and the Quantum™ HD
Panel will display the fault message.
VSD Logic Board Processor Fault – This shutdown
is generated if a communications problem occurs be-
tween the two microprocessors on the Vyper™ Logic
Board. If this shutdown occurs, replace the Vyper™
Logic board.
VSD Low Converter Heatsink Temp Fault – The
phase bank assembly heatsink temperature and the
inverter module base plate temperature are com-
pared to a lower limit of 37°F. If the inverter base
plate temperature or the converter heat sink temper-
ature falls below 37°F, this message will be displayed.
In addition, if both temperatures fall below the 37°F
limit, the unit will trip and the fan(s) and water pump
will be energized.
VSD Low DC Bus Voltage Fault – The DC link under
voltage trip level must be set at 500 VDC for 60 Hz
and 414 VDC for 50 Hz VSD’s. If the DC link drops be-
low this level, the unit will trip, and the Vyper™ Logic
Board will initiate a system shutdown.
VSD Low Inverter Baseplate Temp Fault – The
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