York YVAA Installation, Operation & Maintenance Instructions Manual page 128

SECTION 8 - MICROPANEL
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 holi-
day 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 allow-
ing 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 as-
sure the remote contacts did not momentarily open.
SYS X SYSTEM SWITCH IS OFF
This message indicates the system switch (software via
keypad) is turned OFF. The system will not be allowed to
run until the system switch is turned ON via the keypad.
SYS X NOT RUNNING
This message indicates the system is not running be-
cause 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
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message will be displayed on the lag system until the
loading sequence is ready for the lag system to start.
SYS X COOLING DEMAND SHUTDOWN
This message is only displayed in the Normal Shut-
down History display to indicate a capacity control
shutdown.
SYS X COMPRESSOR RUNNING
This message indicates the system is running as a result
of cooling demand.
SYS X SHUTTING DOWN
The compressor shutting down message indicates the re-
spective system is ramping down in speed prior to shut-
ting OFF. This message is displayed after the software
run signal is disabled until the VSD notifies the Chiller
Control Board the compressor is no longer running.
SYS X ANTI-RECYCLE TIMER
This message indicates the amount of time left on the
respective system anti-recycle timer and the system is
unable to start until the timer times out.
SYS X DISCHARGE PRESSURE LIMITING
The Discharge Pressure Limiting message indicates
the discharge pressure load limit or discharge pressure
unloading is in effect.
SYS X SUCTION PRESSURE LIMITING
The Suction Pressure Limiting message indicates the
suction pressure load limit or suction pressure unload-
ing is in effect.
SYS X MOTOR TEMP LIMITING
The Motor Temp Limiting message indicates the motor
temp load limit or motor temp unloading is in effect.
SYS X MOTOR CURRENT LIMITING
The motor current limiting message indicates the mo-
tor current load limit or motor current unloading is in
effect.
FORM 201.28-NM1.1
ISSUE DATE: 1/31/2018
= XXX SEC
JOHNSON CONTROLS