VYPER
™
VARIABLE SPEED DRIVE
MAINTENANCE
100.200-IOM (SEP 13)
Page 58
VSD FAULT CODE DESCRIPTIONS
Fault 1 : VSD Interface Board Power Supply
Message
Quantum: “Fault 1”
Quantum LX: “VSD Interface Board Power Supply Fault”
This fault is set on every power-up. It is immediately cleared,
and logged in the fault history to record the occurrence of
the power loss.
Fault 2 : Interface Board Loss of Motor Current
Message
Quantum: “Fault 2”
Quantum LX: “VSD Interface Board Loss of Motor Current”
This fault occurs whenever the Vyper
™
is running and a motor
current of less than 10 % FLA is detected for at least twenty-
five continuous seconds. To clarify, 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.
Fault 3: VSD Interface Board Motor Current > 15%
Message
Quantum: “Fault 3”
Quantum LX: “VSD Interface Board Motor Current > 15%”
This fault occurs whenever the Vyper
™
is not running and
a motor current of greater than 15 % FLA is detected for at
least ten seconds.
Fault 4: VSD Interface Board Run Signal
Message
Quantum: “Fault 4”
Quantum LX: “VSD Interface 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 five seconds before the fault
is set, and are only applicable in automatic mode.
Fault 5: Interface Board Panel Communications Loss
Message
Quantum: “Fault 5”
Quantum LX: “VSD Interface Board to Panel Comms Loss”
This fault occurs when the Frick Interface Board loses com-
munications from the Quantum
™
LX Control Panel, meaning
it has not received any data for a period of fifteen seconds.
It is only applicable in automatic mode.
Fault 7: Vyper Initialization
Message
Quantum: “Fault 7”
Quantum LX: “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 established. There are many causes for an unsuc-
cessful initialization. The following check list should aid in
determining why the initialization has not been completed:
• The Control Center and the Vyper
™
must be energized at
the same time. The practice of pulling the fuse in the con-
trol center to make wiring changes will create a problem.
Power-up must be done by closing the main disconnect
on the Vyper
™
cabinet with all fuses in place. Be sure you
do not have an open fuse, causing loss of power to the
Vyper
™
Logic board which can cause this fault.
• The
EPROMs must be correct for each board, and they
must be correctly installed. There are a total of seven (7)
EPROMs in each Vyper
™
system. These EPROMs are cre-
ated as a set, and cannot be intermixed. All pins must be
properly inserted into the EPROM sockets.
•
Serial data must be established. (See: Serial Communication
Fault” error code). If communications between the Vyper
™
Logic, Filter Logic, and Interface Boards and Quantum panel
does not take place during initialization, Fault 5 message
will appear before any other message can be generated.
Check to see that the serial communications have been
established by selecting the Motor information screen
verifying the drive horsepower. A zero displayed value for
this parameter (and all other Vyper
™
parameters) indicates
a serial communications link or EPROM problem.
• If the
Harmonic Filter option is included, make sure the
Harmonic Filter Logic board is not in continuous reset.
This will be evidenced by the LEDs on the filter logic board
alternately blinking. To rule out the Harmonic Filter as
the cause of initialization failure, disconnect the filter by
switching the filter logic board’s
SW1 switch to the OFF
position, and removing the 16 wire ribbon cable between
the Harmonic Filter logic and Vyper
™
Logic Board.
Fault 8: Vyper - Stop Contacts
Message
Quantum: “Fault 8 “
Quantum LX: “VSD Stop Contacts Fault “
This fault occurs if the No 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.
Whenever the Vyper
™
initiates a fault, it first opens the K1
relay on the Vyper
™
Logic board. When the relay opens,
the voltage between wire #53 and #16 will be 115 VAC. If
wire #53 to #16 circuit ever opens without receiving an ac-
companying cause for the trip over the serial link (within 11
communication tries, approximately 22 seconds), this Fault
Code will be displayed. A loose wire is often the cause of
this problem. Check the #1 to #53 horseshoe jumper in the
Control Center and all other wiring involving #53 and #16.
This fault may be replaced with a Serial Communications
fault if the serial link has failed.
Fault 9: Harmonic Filter - Logic Board Or Communications
Message
Quantum: “Fault 9 “
Quantum LX: “Harmonic Filter Logic Board or Comms Fault “
This fault occurs if the No Fault signal from the Vyper
™
is low,
indicating a fault is present at the Vyper
™
or the Harmonic
Filter, but the communications data contains no Harmonic
Filter fault data for twenty seconds. The Frick Interface Board
will send Initialize data requests while this fault is active.
This Fault Code can also occur as a background message
when the chiller is running. When this message is displayed,
all filter related values are unavailable. If communications is
reestablished, normal values will again be displayed. If this