Dbs - Johnson Controls FRICK QUANTUM LX Operation

090.022-O (MAY 12)
Page 44
ACCESSING:
DESCRIPTION: Drive safeties are important for the safe operation of the compressor and motor.
This screen is available if a RAM DBS motor starter has
been installed set up for use with the Quantum™ LX. The
purpose of a DBS motor starter is to accelerate the motor
in a smooth stepless motion, therefore it reduces supply
voltage dip during motor start, and mechanical shock on
the compressor.
The current system conditions of the RAM DBS are re-
ceived from the DBS via communications and are dis-
played here for monitoring.
Warnings and trips (shutdowns) that are recorded by the
DBS are shown on the Quantum™ Safeties screen. Any
DBS warning or trip condition must be corrected before
clearing.
The following RAM DBS setpoints may be modifi ed from
this screen:
[Read Motor Amps From] – Choose one of the fol-
lowing selections to determine where to read the
Motor Amps from:
• DBS – Read the Motor Amps directly from
the DBS panel to the Quantum™ LX through
RS-4845 communications.
• CT – Read the Motor Amps through an op-
tionally connected and confi gured CT (Cur-
rent Transformer). This CT, if provided, will
be located on channel 16 of analog board 1.
Motor Starter – Some of the information in this
section is shown in blue lettering, and cannot be
QUANTUM™ LX COMPRESSOR CONTROL PANEL
OPERATION
SETPOINTS – Motor (DBS)
Setpoints Setpoints
Motor Motor
...
changed. This information is received directly from
the DBS via communications, and represents the op-
erational status of the DBS. These items are:
• DBS Software Version – If the DBS and
Quantum™ LX are communicating properly,
a value other than zero should be displayed
here. This represents the current version of
software that is running the DBS. A value of
zero may indicate a communications error.
• Current Phase (A, B, C) – When the DBS is
running, the actual current value for each of
the three phases will be shown here.
• Average Current – This is a calculated value
that represents the average current from all
three phases.
• Full Load Amps – Motor Full Load Current
(Amps) has been factory set using a switch
within the DBS main control board. This
switch is set based on starter size.
• Starter Wiring –This value is read from a
switch within the DBS, and will show one of
two possible types of wiring, either Delta or
Inline. This is set at installation and is shown
here for informational purposes only.
• Size – This value is read from a switch with-
in the DBS, and will show the size of the
starter that is being used to control the mo-
tor. This is set at installation and is shown