FORM 195.26-NM3
YORK INTERNATIONAL
57
The battery is a 10-year lithium type. The life of the bat-
tery with power removed will depend upon whether the
Real Time Clock’s internal clock circuit is energized. With
the clock OFF, approximately 10 years can be expected,
with the clock ON, approximately 5 years.
The clock is turned ON and OFF by a jumper on the
Microprocessor Board. While a chiller is operating, the
clock must be ON. Otherwise the internal clock on the
microprocessor will not be active and the micro cannot
keep track of time, although all other functions will oper-
ate normally. This could result in the chiller not starting
due to the time frozen on the clock falling outside the
START/STOP time window that is programmed in the
DAILY SCHEDULE.
If the chiller is shut-down for extended periods of months,
it may be desirable to disable the clock to save battery
life. The clock can then be reactivated and reprogrammed
when the chiller is returned to service.
NOTE: ALL PROGRAMMED VALUES AND STORED
DATA, OTHER THAN THE INTERNAL CLOCK
TIME-KEEPING, WILL BE MAINTAINED IN
MEMORY REGARDLESS OF WHETHER THE
CLOCK IS ON OR OFF AND REGARDLESS
OF THE LENGTH OF THE POWER FAILURE.
To disable the clock, place the jumper (Fig. 24) in the
FIG. 21 – LOCATION OF THE MICROPROCESSOR BOARD
26001A
26000A
FIG. 22 – ALARM CONTACT CONNECTION
LOCATION
LD00576
SYSTEM SWITCHES 1-4
ON MICROPROCESSOR BOARD
MICROPROCESSOR BOARD
Содержание YCUZ330A3
Страница 79: ...FORM 195 26 NM3 YORK INTERNATIONAL 79 LD00643...
