225
JOHNSON CONTROLS
FORM 201.21-NM1 (616)
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,
that could possibly be displayed at any time on a 2 com-
pressor chiller or 4 messages that could be displayed on
a 3 or 4 compressor chiller.
Examples of the typical Status messages are shown
below:
General Status Messages
STATUS KEY (CON'T)
This message indicates the chiller is operating in
MANUAL OVERRIDE mode. This message is a pri-
ority message and cannot be overridden by any other
STATUS message. When in Manual Override, no other
status message will ever be present.
This message indicates the UNIT SWITCH is in the off
position and not allowing the unit to run.
This message indicates that either the daily or holiday
schedule programmed is keeping the chiller from run-
ning.
This message indicates that either an ISN or RCC has
turned the chiller off and is not allowing it to run.
UNIT STATUS
MANUAL OVERRIDE
UNIT STATUS
UNIT SWITCH OFF SHUTDOWN
UNIT STATUS
DAILY SCHEDULE SHUTDOWN
UNIT STATUS
REMOTE CONTROLLED 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
FLOW SWITCH 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.
UNIT STATUS
VSD COOLING SHUTDOWN
This message indicates the remote start/stop contact is
open. There is a 1 second delay on this safety to assure
the remote contacts did not momentarily open.
This message indicates the system switch (software
via keypad) is turned off. The system will not be al-
lowed to run until the system switch is turned ON via
the keypad.
This message indicates the system is not running because
the chilled liquid is below the setpoint or the micro has
not loaded the lead system far enough into the loading
sequence to bring the lag system on. This message will
be displayed on the lag system until the loading sequence
is ready for the lag system to start.
This message is only displayed in the Normal Shut-
down History display to indicate a capacity control
shutdown.
This message indicates the system is running as a result
of cooling demand.
SYS X REMOTE RUN CONTACT IS OPEN
SYS X SYSTEM SWITCH IS OFF
SYS X NOT RUNNING
SYS X COOLING DEMAND SHUTDOWN
SYS X COMPRESSOR RUNNING
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Содержание YCAV0157-0267
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Страница 57: ...57 JOHNSON CONTROLS FORM 201 21 NM1 616 ELEMENTARY CONTROL WIRING DIAGRAM CON T 6 LD12519 ...
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