York YK-EP Operation And Maintenance Manual page 15

7. Cycling Shutdown Contacts
The chiller operating program resides in the OptiView Control Center Microboard. The Control
Center could be equipped with the following Microboards:
• 031-02430-001 – Shipped in new production chillers after June 2006. This is an upgraded
version of the 031-02430 microboard. The upgrade is necessary to operate with the Medium
Voltage Solid State Starter, Medium Voltage Variable Speed Drive and those Variable Speed
Drives and Style B Solid State Starters that serially communicate with the microboard using
Modbus Protocol.
The upgrade includes a larger BRAM (U38) and an additional RS-485 port on COM2 serial port for
Modbus communications.
Software version (D.Exx.01.xx.yzz) are alphanumeric codes that represent the application, language
package and revision levels per below. Each time the controls portion or language section is
revised, the respective revision level increments.
• D – Industrial chiller
• Exx – Used on Microboard 031-02430-001
• 01 – YKEP chiller
• xx – controls revision level (00, 01, etc)
• y – language package (0 equals English only, 1 equals NEMA, 2 equals CE, 3 equals NEMA/CE )
• zz – language package revision level (00, 01, etc)
• 031-03630-001 – Shipped in new production chillers after August 2016. This is an upgraded
microboard that operates with the Electro-Mechanical, Medium Voltage Solid State Starter,
Medium Voltage Variable Speed Drive and those Variable Speed Drives and Style B Solid State
Starters that serially communicate with the microboard using the Modbus Protocol.
Software version (Z.OPT.01.xx.yzz) are alphanumeric codes that represent the application, language
package and revision levels per below. Each time the controls portion or language section is
revised, the respective revision level increments.
• Z – Industrial chiller
• OPT – Used on Microboard 031-03630-001
• 01 – YKEP chiller
• xx – controls revision level (00, 01, etc)
• y – language package (0 equals English only, 1 equals NEMA, 2 equals CE, 3 equals NEMA/CE )
• zz – language package revision level (00, 01, etc)
YK-EP Style B Centrifugal Chiller 15