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QUANTUM™ HD COMPRESSOR CONTROL PANEL
OPERATION
090.040-O (MAR 12)
Page 151
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 module
base plate temperature falls below this limit the unit
will trip and the Quantum™ HD Panel will display this
message.
VSD Low Phase A Inverter Baseplate Temp.
– The
phase A heatsink temperature and the inverter mod-
ule base plate temperature are compared to a lower
limit of 37°F. If the inverter module base plate tem-
perature falls below this limit the unit will trip and
the Quantum™ HD Panel will display this message. In
addition, if both the inverter and converter tempera-
tures fall below the 37°F limit, the unit will trip and
the fan(s) and water pump will be energized.
VSD Low Phase B Inverter Baseplate Temp.
– The
phase B heatsink temperature and the inverter mod-
ule base plate temperature are compared to a lower
limit of 37°F. If the inverter module base plate tem-
perature falls below this limit the unit will trip and
the Quantum™ HD Panel will display this message. In
addition, if both the inverter and converter tempera-
tures fall below the 37°F limit, the unit will trip and
the fan(s) and water pump will be energized.
VSD Low Phase C Inverter Baseplate Temp.
– The
phase C heatsink temperature and the inverter mod-
ule base plate temperature are compared to a lower
limit of 37°F. If the inverter module base plate tem-
perature falls below this limit the unit will trip and
the Quantum™ HD Panel will display this message. In
addition, if both the inverter and converter tempera-
tures fall below the 37°F limit, the unit will trip and
the fan(s) and water pump will be energized.
VSD Phase A Gate Driver Fault
– The unit’s phase
bank assembly shall contain one IGBT gate driver
control board. This board monitors the saturation
voltage drop across the Phase A Gate Driver while
gated on. If the IGBT’s Phase A Gate Driver satura-
tion voltage exceeds the prescribed limit, the gate
driver will make the determination that a short circuit
is present. This in turn shall cause the unit to trip
and the Quantum™ HD Panel shall display this mes-
sage. If the driver board’s power supply voltage falls
below the permissible limit, this same message shall
be generated.
VSD Phase B Gate Driver Fault
– The unit’s phase
bank assembly shall contain one IGBT gate driver
control board. This board monitors the saturation
voltage drop across the Phase B Gate Driver while
gated on. If the IGBT’s Phase B Gate Driver satura-
tion voltage exceeds the prescribed limit, the gate
driver will make the determination that a short circuit
is present. This in turn shall cause the unit to trip
and the Quantum™ HD Panel shall display this mes-
sage. If the driver board’s power supply voltage falls
below the permissible limit, this same message shall
be generated.
VSD Phase C Gate Driver Fault
– The unit’s phase
bank assembly shall contain one IGBT gate driver
control board. This board monitors the saturation
voltage drop across the Phase C Gate Driver while
gated on. If the IGBT’s Phase C Gate Driver satura-
tion voltage exceeds the prescribed limit, the gate
driver will make the determination that a short circuit
is present. This in turn shall cause the unit to trip
and the Quantum™ HD Panel shall display this mes-
sage. If the driver board’s power supply voltage falls
below the permissible limit, this same message shall
be generated.
VSD Precharge Lockout Fault
– If the Vyper™ fails to
meet the precharge criteria, then the precharge circuit
will wait for a period of 10 seconds. During this time,
the unit’s cooling fans and coolant pump remain en-
ergized in order to cool the input SCR’s. Following this
10-second cool-down period, precharge will again be
initiated. The unit will attempt to meet the precharge
criteria three consecutive times. If the Vyper™ fails
to meet the precharge criteria on three consecutive
tries, the Vyper™ will shut down, lock out, and display
this message. In order to initiate precharge again, the
Quantum™ HD panel’s compressor switch must
fi
rst
be placed into the STOP/RESET position.
VSD Precharge
- DC Bus Voltage Imbalance – The
1/2 DC link voltage magnitude will remain within ±
88VDC of the total DC link voltage divided by two
during the precharge interval for both the 60 and 50
Hz VSD’s. If not, the Quantum™ HD panel will display
this message. The de
fi
nition for this fault is identical
to “VSD - DC Bus Voltage Imbalance”, except that the
fault has occurred during the precharge period which
begins during prelube.
VSD Precharge - Low DC Bus Voltage 1
– The DC
link voltage will reach at least 50 VDC within 100
msec after the precharge relay has been pulled in on
the 60 Hz 519
fi
lter and at least 41 VDC within 100
msec on the 50 Hz 519
fi
lter. If not, the Quantum™ HD
panel will display this message.
VSD Precharge - Low DC Bus Voltage 2
– The DC
link voltage will reach at least 50 VDC within 100
msec after the precharge relay has been pulled in on
the 60 Hz 519
fi
lter and at least 41 VDC within 100
msec on the 50 Hz 519
fi
lter. If not, the Quantum™ HD
panel will display this message.
VSD Run Signal Fault
– Upon receipt of either of the
two run commands, a 5-second timer will start. If the
missing run signal is not asserted within the 5-sec-
ond window, the unit will trip and the Quantum™ HD
panel will display this message.
VSD Serial Communication Fault
– When request-
ing Status data, the response data from the Vyper™
includes a bit that indicates whether communica-
tions were lost from the Frick Interface Board to the
Vyper™. If this bit is high for 22 consecutive seconds,
this fault occurs. This fault also occurs whenever a
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