Table of Contents
vii
How To Check the Firmware Version........................................................................ 89
Digital Logic Control................................................................................................. 90
I/O Board Digital Circuitry............................................................................ 90
Digital Input Priorities................................................................................... 92
Digital Functions........................................................................................... 93
Analog Set Point Inputs................................................................................. 95
Chapter Seven: Battery-Backed Memory Module.................................................................. 97
Replacing the Battery-Backed Memory Module......................................................... 97
Opening the Unit........................................................................................... 97
Removing the CPU Board and Memory Module ........................................... 98
Installing a New Memory Module and Replacing the CPU Board.................. 99
Replacing the Cover...................................................................................... 99
Chapter Eight: Valve Failsafe Battery Back-up Option.......................................................... 101
General Information................................................................................................... 101
Battery Voltage.......................................................................................................... 102
Valve Positions.......................................................................................................... 102
Startup....................................................................................................................... 103
Threshold Voltage Check .............................................................................. 103
Battery Voltage Within Range....................................................................... 103
Battery Voltage Out-of-Range....................................................................... 104
Operation................................................................................................................... 105
How To Check the Battery Voltage............................................................... 105
How To Set The Battery Back-up Valve Control........................................... 106
Expected Battery Life ................................................................................................ 108
Battery Storage.......................................................................................................... 108
Battery Replacement.................................................................................................. 109
Opening the Unit........................................................................................... 109
Installing the New Battery............................................................................. 110
Chapter Nine: Maintenance................................................................................................... 111
General Information................................................................................................... 111
How To Replace Fuses .............................................................................................. 111
Appendix A: Product Specifications...................................................................................... 113
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