QUANTUM™ HD COMPRESSOR CONTROL PANEL
OPERATION
090.040-O (MAR 12)
Page 149
be generated if either the False Running Failure shut-
downs (Motor Amps or Confi rmed Running) occurs,
and the Shunt Trip digital output is confi gured (board
and channel).
Slide Valve Failure Shutdown – When in sequencing
mode, if the controlling compressor fails to properly
load the Slide Valve, a shutdown occurs, and control
moves to the next compressor.
Start Failure Shutdown For Eng And Turb - This
message may be issued if Engine or Turbine was en-
abled, and the start delay period to get to a running
condition has expired.
Starting Failure - Low Motor Amps - This shutdown
message is displayed if after 30 seconds from sending
the compressor start signal, the Motor Amps reading
is not greater than the Low Motor Amps Shutdown
setpoint.
Starting Failure - No Compressor Auxiliary - This
shutdown message is displayed if after 450 seconds
from sending the compressor start command, the
compressor auxiliary input module is still not ener-
gized.
Stopping Failure-Aux. - This shutdown message is
issued if while stopping the compressor, after 8 sec-
onds from the “Compressor Stop” command being
issued the compressor auxiliary is still energized.
Stopping Failure-Motor Amps - This shutdown is
issued if while stopping the compressor, after 12
seconds from the compressor stop command being
issued the motor current reading is above the Low
Motor Amps Shutdown setpoint.
VSD – Ambient Temperature Force Unload - Oc-
curs when the Vyper cabinet temperature reaches
135 F and this will unload the Slide Valve.
VSD – Ambient Temperature Inhibit - Occurs when
the Vyper cabinet temperature reaches 130 F and this
will inhibit the Slide Valve from loading.
VSD Communication Failure Warning - If Vyper™
option is enabled and communications has been lost
between the Quantum™ HD and the VSD driver for
over fi ve seconds, this warning is shown.
VSD Board NovRAM Failure – The integrity of the
NovRAM is verifi ed on every power-up. A known val-
ue is written to a specifi ed location in NovRAM, read
back from that location, and compared to the value
originally written. If the two values do not match, the
NovRAM Failure fault is displayed.
VSD Board Motor Current > 15% - This fault occurs
whenever the Vyper™ is running and a motor current
of less than 10 % FLA is detected for at least twenty-
fi ve continuous seconds. This fault is only checked
when the Run Acknowledge output is engaged.
Therefore, it is NOT checked during STANDBY, which
prevents this fault from occurring during STANDBY.
VSD Board Power Supply Fault – The various DC
power supplies which power the Board are monitored
via hardware located on the Board. If any of these
power supplies fall outside their allowable limits, the
unit will trip and the Quantum™ HD Panel will display
the fault message.
VSD Board Run Signal Fault - This fault occurs if the
Run Signal from the Quantum Control Panel is high,
but the speed command being sent over the RS-485
communications link is zero. It may also occur if the
Run Signal is low, but the speed command is not zero.
Both conditions must be present for fi ve seconds be-
fore the fault is set, and are only applicable in auto-
matic mode.
VSD Board to Panel Comms Loss - This fault occurs
when the Frick Interface Board loses communications
from the Quantum™ HD Control Panel, meaning it
has not received any data for a period of fi fteen sec-
onds. It is only applicable in automatic mode.
VSD Current Imbalance Fault – When the average
of the three output phase currents exceeds 80% of
the 100% Job FLA, the % Output Current Imbalance
is calculated using the following equation: [ ( Ia-Iave
) + ( Ib-Iave ) + ( Ic-Iave ) / {2}{Iave}] [100]: Iave
= {Ia + Ib + Ic}/3. If the % Imbalance exceeds 30%
continuously for 45 seconds the unit shall trip and the
Quantum™ HD panel shall display this message. The
imbalance fault is disabled when the average of the
three output phase currents drops below 80% FLA.
VSD DC Bus Voltage Imbalance Fault – The 1/2 DC
link voltage magnitude must remain within ± 88 VDC
of the total DC link voltage divided by two for both
60 and 50 Hz VSD’s. If the 1/2 DC link magnitude ex-
ceeds the ± 88 volt window, the unit will trip and the
Quantum™ HD will display this message.
VSD High Converter Heatsink Temp Fault – A
thermistor sensor is located behind the last SCR/Di-
ode block on the copper chill plate of the Vyper™
Power Unit. If this thermistor detects a temperature
of 170°F (76°C) or higher, a shutdown will occur. The
cooling fans and coolant pump on the Vyper™ will
continue to run after the shutdown, until the thermis-
tor temperature has dropped to below 160°F (71°C).
This shutdown requires a manual reset via the Reset
push button on the Vyper™ Logic board.
VSD High DC Bus Voltage Fault – The DC link over-
voltage trip level is determined by hardware on the
logic board and it is designed to trip the unit at 745
+/- 17 VDC for both 60 and 50 Hz VSD’s. If the DC bus
current exceeds this level, the unit will trip and the
Quantum™ HD Panel will display this message.
VSD High Internal Ambient Temp Fault – The logic
board contains a temperature sensor which monitors
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