Specifications

63
JOHNSON CONTROLS
Form 201.28-NM1.EN.PED/CE (0211)
8
STATUS KEY
Status Key Operation
The STATUS key displays the current chiller or system
operational status. The messages displayed include
running status, cooling demand, system faults, unit
faults, VSD faults, unit warnings, external device status,
load limiting, anti-recycle timer, status of unit/system
switches, and a number of other messages. Pressing
the STATUS key will enable the operator to view the
current status of the chiller. The display will show one
message relating to the “highest priority” information as
determined by the microprocessor. There are three types
of status data, which may appear on the display:
• General Status messages
• Unit Safeties
• System Safeties.
When power is first applied to the control panel, the
following message displaying York International
Corporation, the EPROM version, date, and time will
be displayed for 2 seconds, followed by the appropriate
general status message:
(c)2010 YORK INTERNATIONAL CORPORATION
C.ACS.XX.XX 01-JAN-2010 12:00:00 AM
Unit status messages occupy 2 lines of the Status message
display. If no unit status message applies, individual
status messages for each system will be displayed.
Any time the STATUS key is pressed or after the EPROM
message disappears at power-up, a status display
indicating chiller or system status will appear.
Multiple STATUS messages may appear and can be
viewed by pressing the STATUS key repeatedly to allow
scrolling through as many as three STATUS messages,
which could possibly be displayed at any time on a 2
compressor chiller.
Examples of the typical Status messages are shown
below:
General Status Messages
UNIT STATUS
MANUAL OVERRIDE
This message indicates the chiller is operating in
MANUAL OVERRIDE mode. This message is a
priority message and cannot be overridden by any other
STATUS message. When in Manual Override, no other
status message will ever be present.
UNIT STATUS
UNIT SWITCH OFF SHUTDOWN
This message indicates the UNIT SWITCH is in the OFF
position and not allowing the unit to run.
UNIT STATUS
DAILY SCHEDULE SHUTDOWN
This message indicates that either the daily or holiday
schedule programmed is keeping the chiller from
running.
UNIT STATUS
REMOTE CONTROLLED SHUTDOWN
This message indicates that either an ISN or RCC has
turned the chiller OFF and is not allowing it to run.
UNIT STATUS
FLOW SWITCH SHUTDOWN
This message indicates the flow switch is not allowing the
chiller to run. There is a 1 second delay on this safety to
assure the flow switch did not momentarily open.
UNIT STATUS
VSD COOLING SHUTDOWN
This message indicates the chiller is shutdown, but
running all the condenser fans, VSD glycol pump, and
VSD fan in an effort to bring the internal VSD ambient
temperature down to an acceptable level before allowing
the chiller to start.
SYS X REMOTE RUN CONTACT IS OPEN
This message indicates the remote start/stop contact
between 2 and 15 or 2 and 16 of the 1TB terminal block
is open. There is a 1 second delay on this safety to assure
the remote contacts did not momentarily open.
SECTION 8 - MICROPANEL