Sub-Zero UC-24 series Service Manual page 26

Electronic Control System
Temperature Log Event Indicators
The diagrams below illustrate possible event indicators that may be observed while in Temperature Log Recall
Mode. (See Figures 3-53 through 3-55 and Temperature Log Index Chart on next page)
Figure 3-53. "bl" Indicates Index is "blank" - No Temperature has Been Logged Yet
(Only possible within first 14 days of unit operation, or after new control board is installed during service)
Indicates Unit was switched OFF During that Index Period by Pressing POWER Key
Figure 3-55. Bell Illuminates - Indicates Power Failure / Interruption During that Index Period
NOTES:
• If the unit was in Showroom Mode during any of the 168 indexes, average temperatures will continue to be
logged. No event indicator will appear with these temperatures.
• If the unit was switched OFF by pressing the POWER key during any of the 168 indexes and there was still power
supplied to the control board, the average temperatures will continue to be logged. This means temperatures
would be expected to rise and the SERVICE icon would be present in all indexes in which the unit was OFF.
• Temperature Log Recall Mode will end twenty (20) seconds after the last key stroke.
#7003933 - Revision B - November, 2007
Under Counter (UC-24) Series
Figure 3-54. SERVICE Illuminates -
3-26