VYPER
™
VARIABLE SPEED DRIVE
MAINTENANCE
100-200 IOM (FEB 09)
Page 56
The logic board contains a temperature sensor which moni-
tors the unit’s internal ambient temperature. The magnitude 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
™
LX
panel will display the Fault 35. 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.
Some potential causes for this shutdown are: internal Vyper
™
fan failure, Vyper
™
water pump failure or an entering con-
denser water temperature which exceeds the allowable limit
for the job. Additional causes for the shutdown include:
Plugged Heat-Exchanger – The heat exchanger should be
cleaned once a year and back flushed.
Low Condenser Flow – The Vyper
™
system requires 8 feet
of pressure drop across the heat exchanger to maintain ad-
equate GPM. If the pressure drop is less than 8 feet, it will
be necessary to correct the flow problem or add a booster
pump.
Fault 36: Vyper High Inverter Base plate Temperature
Message
Quantum: “Fault 36”
Quantum LX: “VSD High Inverter Base plate Temp Fault”
A thermistor sensor is located inside the IGBT Module on
the Vyper
™
power unit. If at anytime 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, until the thermistor tem-
perature has dropped to below 165°F (74°C). This shutdown
requires a manual reset via the Reset push button on the
Vyper
™
logic board.
Fault 37: Vyper logic Board Processor
Message
Quantum: “Fault 37”
Quantum LX: “VSD Logic Board Processor Fault”
This shutdown is generated if a communications problem
occurs between the two microprocessors on the Vyper
™
Logic Board. If this shutdown occurs, replace the Vyper
™
Logic board.
Fault 38: Vyper Run Signal
Message
Quantum: “ Fault 38“
Quantum LX: “ 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
™
LX
panel will display the message Fault 38.
Redundant run signals are generated, one via wire #24 and
the second via the serial communications. Upon receipt of
either of the two run commands by the Vyper
™
Logic board,
a 5-second timer will begin. If the missing run command is
not received within the 5-second window, the Vyper
™
will shut
down and the Quantum
™
LX Panel will display the shutdown
message. This shutdown could occur if there is a problem with
the wiring between the Quantum
™
LX panel and the Vyper
™
Logic board. Check the #24 to #25 horseshoe jumper in the
Quantum
™
LX panel, and all other wiring involved in energiz-
ing #24 in the Vyper
™
cabinet. Also check to ensure that the
serial communications wiring between the micro board and
the Interface board, and Vyper
™
Logic board and the Interface
board are connected properly.
Fault 39: Vyper High Converter Heat Sink Temperature
Message
Quantum: “Fault 39”
Quantum LX: “VSD High Converter Heat Sink Temp Fault”
A thermistor sensor is located behind the last SCR/Diode
block on the copper chill plate of the Vyper
™
Power Unit. If at
anytime 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 thermistor 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.
Fault 40: Vyper Invalid Current Scale Selection
Message
Quantum: “Fault 40”
Quantum LX: “VSD Invalid Current Scale Selection Fault”
The J1 connector on the Vyper
™
Logic board contains jump-
ers along with wires from the output CTs. Since the part
number of the Logic board is the same on all horsepower
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 configuration is found by the Logic board to be
invalid, the system will be shut down and the above message,
Fault 40, will be generated. The proper jumper configuration
is shown on the wiring label for the Vyper
™
.
Fault 41: Vyper low Inverter Base plate Temperature
Message
Quantum: “Fault 41”
Quantum
™
LX: “VSD Low Inverter Base plate Temp Fault”
The phase bank assembly heatsink temperature and the in-
verter module base plate temperature are compared 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
™
LX Panel will
display the message Fault 41. In addition, if both the inverter
and converter temperatures fall below the 37°F limit, the unit
will trip and the fan(s) and water pump will be energized. This
feature provides the Service Dept. with a means to run the
water pump while filling the cooling system (by pulling Vyper
™
logic board plug P2). In most case the problem will be broken
wiring or an open thermistor. Check the circuit for continuity at
Vyper
™
Logic board plug J2. Also make certain that one side
of the circuit is not shorted to the enclosure.
Fault 42: Vyperdrive - Serial Communication
Message
Quantum: “Fault 42”
Quantum LX: “VSD Serial Communications Fault”
When requesting Status data, the response data from the
Vyper
™
includes a bit that indicates whether communications
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 receive, timeout, or checksum
fault is detected on the Vyper
™
communications, for twenty
continuous seconds. While this fault is active, the Frick In-
terface Board will send Initialize data requests in order to
reestablish the communications link. All serial input data is
also cleared.