Trane CenTraVac Duplex CDHE, Operation & Maintenance Manual

Page: 32 / 116

CDHF-SVU01C-EN
32
Operator
Interface
The Auto and Stop keys are used to
put the unit into the auto or stop
modes. Key selection is indicated by
being darkened (reverse video).
The Alarms button is to the right of
the Stop key. The Alarms button
appears only when alarm information
is present. The alarm blinks to draw
attention to the shutdown diagnostic
condition. Blinking is defined as
normal versus reverse video.
Pressing on the
Alarms button takes
you to the corresponding screen.
Persistent keys , horizontal at the
bottom of the display, are those keys
that must be available for operation
regardless of the screen currently
being displayed. These keys are
critical for machine operation. The
Auto and Stop keys will be
presented as radio buttons within the
persistent key display area. The
selected key will be dark. The chiller
will stop when the
Stop key is
touched, entering the stop sequence.
Pressing the “Immediate Stop”
button will cause the chiller to stop
immediately.
The AUTO and STOP, take
precedence over the ENTER and
CANCEL keys. (While a setting is
being changed, AUTO and STOP
keys are recognized even if ENTER or
CANCEL has not been pressed.
Selecting the Auto key will enable the
chiller for active cooling ( if no
diagnostic is present.)
Chiller Stop Prevention/Inhibit
Feature
A new chiller “Stop prevention/
inhibit” feature allows a user to
prevent an inadvertent chiller stop
from the DynaView screen for those
chillers which are solely controlled
by the CH530.
How It Works
This new feature will be activated
after the service tech sets a variable
shut down timer in TechView to be
greater that 0 seconds and up to 20
seconds (i.e. 0 < Timer ± 20). Then,
when the user presses the ‘STOP’
button on the DynaView display and
initiates a chiller shutdown, a
window will now appear that
displays the “Unit Stop Information
Screen” as shown below.
TechView service tool is utilized to
enable this feature.