Johnson Controls Frick QUANTUM LX Manual page 101

for a period of 10 seconds. During this time, the unit's
cooling fans and coolant pump remain energized 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
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
compressor switch must first 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 ™ LX panel will display this message. The
definition 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 filter
and at least 41 VDC within 100 msec on the 50 Hz 519
filter. If not, the Quantum
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 filter
and at least 41 VDC within 100 msec on the 50 Hz 519
filter. If not, the Quantum
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-second window, the
unit will trip and the Quantum
message.
VSD Serial Communication Fault – When requesting
Status data, the response data from the Vyper
FRICK QUANTUM™ LX COMPRESSOR CONTROL PANEL
®
OPERATION - SERVICE
fails to meet the
™
™ LX panel's
™ LX panel will display this
LX panel will display this
™
™ LX panel will display this
™ includes a
bit that indicates whether communications were lost from
the Frick Interface Board to the Vyper
for 22 consecutive seconds, this fault occurs. This fault
also occurs whenever a receive timeout, or checksum
fault is detected on the Vyper
twenty continuous seconds. While this fault is active, the
Frick Interface Board will send Initialize data requests in
™
order to reestablish the communications link. All serial
input data is also cleared.
VSD Single Phase Input Power Fault –
Trigger Control board contains circuitry that checks the
three-phase mains for the presence of all three line
voltages. If all line voltages are not present, the unit will
trip and the Quantum™ LX Panel will display this message.
VSD Stop Contacts Fault -
signal from the Vyper™ is low. It indicates a fault is
present at the Vyper™ or the Harmonic Filter, but the
communications data contains no Vyper™ fault data for
twenty seconds. The Frick Interface Board will send
Initialize data requests while this fault is active.
VSD 105% Motor Current Overload Fault –
Logic Board generates this shutdown by reading the
current from the 3 output current transformers. The
shutdown is generated when the Vyper™ Logic board has
detected that the highest of the three output phase
currents has exceeded 105% of the programmed 100% full
load amps (FLA) value for more than 40 seconds. If this is
detected, the unit will trip and the Quantum™ LX panel
will display the fault message.
Vyper™ Fault Limit Reached Shutdown -
Logic Board generates faults as they occur. If these faults
are not of a potentially destructive nature, they are
automatically cleared by the Vyper™ logic if the symptom
that created the fault corrects itself. The Quantum™
control tracks these self-clearing faults, and if a total of
five faults occur within a one hour period of time, a
compressor shutdown will occur.
090-022 O (NOV 09)
Page 101
™ . If this bit is high
™ communications, for
The Vyper's™ SCR
This fault occurs if the No Fault
The Vyper™
The Vyper™