FORM 160.52-O1
25
YORK INTERNATIONAL
SYSTEM READY TO START
Indicates that the system is not running, but will start
upon application of a start signal.
STANDBY LUBE IN PROCESS - XXX.X MIN LEFT
Displayed while the chiller is idle and the oil pump is
running during the standby lubrication cycle. The
standby lubrication cycle will run the oil pump for 2 min-
utes every 24 continuous hours of idle time. This fea-
ture provides oil to the bearings and shaft seal during
prolonged shutdowns.
SYSTEM SHUTDOWN PRESS STATUS
Displayed when chiller is shut down on a cycling shut-
down, safety shutdown (operator must move the
COM-
PRESSOR
switch to
STOP/RESET
in order to restart)
or operator-initiated shutdown (within 30 minutes of
initial start-up). The status message consists of the day
and time of shutdown, cause of shutdown, and type of
restart required. Upon pressing
STATUS
key, System
Shutdown Message will be displayed for 2 seconds and
then return to
SYSTEM SHUTDOWN PRESS STATUS
Display can be held indefinitely by depressing
DISPLAY
key. For examples of System Shutdown Messages, see
below.
SYSTEM SHUTDOWN MESSAGES
Day of Week
Cause of Shutdown
Time of Day
Type of Restart
MON 10:00 AM LOW WATER TEMP AUTOSTART
Chiller was shut down on Monday at 10:00 AM because
the LCWT has decreased to a value that is 4°F (2.2°C)
below the operator-programmed chilled liquid tempera-
ture setpoint. However, if the setpoint is less than 40°F
(4.4°C), the chiller will always shut down at 36°F (2.2°C).
Further, if the chiller is running and the setpoint is
changed, the (Low Water Temperature) cutout will be
36°F (2.2°C) for 10 minutes in order to eliminate nui-
sance trips. Finally, for brine chilling applications, the
LWT cutout is always 4°F (2.2°C) below the setpoint.
(The water jumper on the Micro Board must be removed
for a brine unit.)
MON XX:XX AM FLOW SWITCH AUTOSTART
Chiller is shut down because a chilled-liquid flow switch
has opened. The flow switch must open for a minimum
of 2 seconds in order to cause a shutdown. The flow
switch is checked 25 seconds into Start Sequence
Initiated and continuously thereafter.
MON XX:XX AM SYSTEM CYCLING AUTOSTART
A remote command (computer relay contact or manual
switch) connected to the Remote/Local cycling input of
the digital input board has shut down the chiller.
MON XX:XX AM MULTI UNIT CYCLING AUTOSTART
Lead/Lag sequence control accessory has shut down
the chiller.
MON XX:XX AM POWER FAILURE AUTOSTART
The chiller is shut down because there has been a
power interruption or failure. The chiller will automati-
cally restart when power is restored. This message will
be displayed if the Micro Board is configured for
AUTO-
RESTART AFTER POWER FAILURE
. The Micro
Board is factory set for manual restart after power fail-
ure. To convert it to auto-restart after power failure, re-
move one of the two-pin program jumpers from the cloth
bag located inside the Control Center and place it on
the terminals labeled Auto R (J60) on the Micro Board.
MON XX:XX AM POWER FAILURE
The chiller is shut down because there has been a
power interruption or failure. When power is restored,
pressing the COMPRESSOR switch to STOP/RESET
position and then to START position can restart the
chiller. This message will be displayed if the Micro Board
is configured for
MANUAL RESTART AFTER POWER
FAILURE
. The Micro Board is factory set for manual
restart after power failure. This has been accomplished
by removing the two-pin jumper from the terminals la-
beled Auto R (J60) on the Micro Board.
AC UNDERVOLTAGE AUTOSTART
The chiller is shut down because the MicroComputer
Control Center was in
RUN
mode, displaying
SYSTEM RUN LEAVING TEMP CONTROL
but the motor current was less than 10% FLA for 25
continuous seconds. This is indicative of an AC
undervoltage condition that has caused the start relay
(1R) in the MicroComputer Control Center to de-ener-
gize. This condition is checked when the MicroCom-
puter Control Center goes into
RUN
mode (after 30
second pre-lube). This condition can be caused by fail-
ure of any component that would cause a loss of the
start signal from the Control Center. In essence, this
check assures that the compressor is running when
the Control Center is displaying