Ucp2 Clock; The Year 2000 - Trane CVHE Troubleshooting Manual

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UCP2 Clock:

UCP2 clock will retain it's last time stored in it at power down, but will not increment while
powered down. It is necessary to update the time and date if UCP2 is powered down for an
extended period of time. If UCP2 has been powered down for an extended period, then a
informational warning 'Check Clock' will be announced.

The Year 2000:

UCP2 is year 2000 compliant, because UCP2's valid range of dates is January 1st, 1980 to
February 5th, 2116. No date problems will occur in this range, including the year 2000.
There will be no operating effect for UCP2 going to the year 2000. 90 percent of all Trane
centrifugal chillers installed in 1938 were still running in 1994. However, it is unlikely that a chiller
installed in 1996 will run twice that amount of time and make it until 2116. If a chiller does live
until to the year 2116, the clock will roll over to January 1st, 1980. UCP2 does not use the date
for any control functions. The date and time is displayed for the operators information, and as a
time/date stamp for diagnostics.
UCP2 has been tested, and transitions to the year 2000 without any problem.
Date information is not required to be entered in the initial configuration of UCP2. However, most
people do like to set up the clock on initial startup.
The format of UCP2's date follows: Time, Month, Day, Year. Example: 11:59 pm Dec 31,
2116.
The years are input as 4 digits.
The valid range of dates is from January 1, 1980 to February 5, 2116.
When UCP2 reaches the end of the date range, the clock rolls over to January 1, 1980.
Date calculations are not used in the standard operation of the UCP2. UCP2 does not
perform any date based feature activation/deactivation.
Diagnostics are time stamped and the time stamp is displayed in the following format: 6:31
pm Feb 12, 1997.
UCP2 does perform leap year calculations, but does not perform daylight savings time
calculations.
CVHE-SB-32A
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