York Millennium YK M3 M3 G4 THRU YK S6 S4 J2 - Manual (Page 44)

44
Y
ORK INTERNA
TIONAL
SECTION 6
T
R
OUBLESHOO
TING
TABLE 1 – CAUSES OF NORMAL AND SAFETY SYSTEM SHUTDOWNS IN ACCORDANCE WITH THE MICROCOMPUTER CONTROL,
CENTER DISPLAY
SHUTDOWN CAUSE
GOVERNING CONTROL FUNCTION
CONTROL CENTER DISPLAY
OPERATING
PROGRAMMED START-UP OF PROBABLE CAUSE
DAY OF TIME OF CAUSE OF METHOD OF
DESCRIPTION
POINT
SETPOINTS SYSTEM AFTER AND SERVICE
WEEK DAY SHUTDOWN RESTART ON ON
BY OPERATOR SHUTDOWN REQUIRED
RISE FALL
MON. 10:00 AM Low Water Autostart Low Water Chilled 4°F below 4°F below chilled Automatic Restart System load is less
Temp. (LWT) water chiller water setpoint when water reaches than minimum
setpoint water (If set to 40°F setpoint; if system capacity
setpoint would be 36°F) is running and set-
(36°F minimum point is increased
4°F, system will
continue to run, as
LWT cutout shifts
to a fixed 36°F for
10 minutes.
MON. 10:00 AM Flow Switch Autostart Flow Switch Automatic Restart Lack of water flow.
when water flow is Check operation of
Restored to close chilled water pump
flow switch.
MON. 10:00 AM System Autostart A remote com- Automatic Restart Contact-connected to
Cycling mand (computer upon remote the Remote/Local
relay contact or command. cycling input of the
manual switch) Digital input board
MON. 10:00 AM Multi-Unit Autostart (Optional) Lead- Automatic Restart Contact-connected to
Lag Sequence upon remote the Multi-Unit cycling
Control command. input of the Digital
input board
MON. 10:00 AM Internal Autostart Internal Clock Daily Schedule Will automatically Pressing Compressor
Clock Programmed to restart when pro- Start Switch over-
Shutdown Unit grammed schedule rides the program
permits
MON. 10:00 AM AC under- Autostart <15% FLA for Cycling shutdown oc-
voltage 25 continuous curs when motor cur-
seconds rent is >15% FLA for
25 seconds during
chiller operation
MON. 10:00 AM Power Fault Autostart CM-2 Current Will start automatic- Motor Controller con-
Module or tically following tacts opening and
Solid State coastdown closing in less than 3
Starter seconds due to a power
fault condition
Remote Stop Energy manage- Start up by start Remote Stop Contact
ment System signal from remote Closure
start switch
MON. Anti-Recycle, Anti-Recycle Will not start Will restart when Min. Time between
20 Min. Left timer until 30 Min. time left = 00 Min. successive compres-
timer is timed sor starts is 30 min.