Service Manual

24
C. Freeze-Time Correction Cycle (90 min.)
Freeze-Time Correction function is enabled when S4 Dip Switch 7 is in the "ON" position
and initiates when the minimum and maximum freeze times have exceeded differential
parameters. Freeze-time correction timer and count starts at the beginning of the 2nd
freeze cycle after startup from power off condition. Freeze-time correction timer and count
continues and retains its freeze-time correction timer and count during a BC off cycle
and resumes its freeze-time correction timer and count on the 2nd freeze cycle after BC
restart. If freeze-time differential is exceeded (see table below), freeze-time correction
cycle starts and CB red "POWER OK" LED blinks. When freeze-time correction cycle
occurs 3 or more times within a 36 hour period, CB yellow "EXT HARVEST" LED blinks
with CB red "POWER OK" LED. Appliance starts in freeze cycle after a freeze-time
correction cycle. Toreset CB LEDs, press ALARM RESET button on CB with power on.
CB resets LEDs and appliance continues cycle without interruption.
1) Freeze Time Differential Initiation: CB starts monitoring freeze times on the second
freeze time. After 3freeze cycles (4th total), CBbegins to compare minimum and
maximum freeze time cycles. Every freeze cycle time after the rst freeze cycle
time is added to the freeze time list. Minimum and maximum freeze time differential
comparisons begin on the third cycle and are monitored up to 10cycles. On the 11th
cycle the rst freeze cycle time is dropped to maintain the 10 maximum number of
cycles.
Example: After 8 cycles (excluding rst cycle), if the differential between the
shortestcycle (minimum) and the longest cycle (maximum) is equal to or greater than
427 sec. a freeze-time correction cycle is initiated:
Number of
Freeze Cycles
Differential
Value in Sec.
3 254
4 309
5 349
6 380
7 406
8 427
9 446
10 462