York YK-EP Operation And Maintenance Manual page 257

Program card service replacement
Since one YK-EP SD Program card can be used to reprogram other YK-EP chillers, it is not necessary
for an individual Service technician to have more than one YK Program card. Program cards can be
shared among Service technicians where appropriate.
However, since chiller operating programs are occasionally revised, the Service technician could
have a Program card that does not contain the latest program. Program cards (031-03601-002) for
YK-EP chillers are available from the Baltimore Parts Distribution Center (PDC). The card received
from the PDC is programmed with the latest version of the chiller operating program. Program
cards can be re-programmed with the latest program version.
YK-EP Style B Centrifugal Chiller 257