York Millennium YDAS 410 Installation Operation & Maintenance page 111

NOTE: The AM/PM key can only be used once here. If
an error is made, press Cancel and begin again.
NOTE: New start/stop times programmed for Monday
are automatically used for all following days of
the week.
NOTE: Always use the Advance Day key, not the En-
ter key, to scroll through the schedule displays.
This will assure that after viewing Monday, the
Enter key is not pressed which will change times
programmed for the remainder of the week.
NOTE: Programming the DAILY SCHEDULE will not
affect the holiday schedule.
NOTE: Only one start / stop time can be programmed
which will apply to each of the Holiday days
selected.
NOTE: The Holiday Schedule is only performed once,
then erased from memory. This avoids the need
for reprogramming after the holiday, as most
special Holiday Schedule requirements are only
occasional.
NOTE: If a Warning – Low Battery fault message ap-
pears on the display, the internal clock, calendar
and program settings can not be relied on for ac-
curacy. Default values are loaded into the Micro-
processor memory and the Manual Override key
can be used to zero out the daily schedule and
allow unlimited operation regardless of the time
on the internal clock. Reprogramming of the set-
points and cutout values may also be necessary.
When the MANUAL OVERRIDE key is pressed,
the low battery message will disappear. If a power
failure should again occur, the above process will
again need to be repeated to bring the chiller back
on line. See also Section 2.2.