CenCon
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Appendix C – Startup Checks
1
Check and confirm all hardware connections
a.
Terminal Plugs firmly attached.
b.
Wiring connections.
2
Confirm ground bonding is correct and firmly fastened.
3
Confirm shielded grounds are correct.
4
Confirm internal Modbus wiring is correct (LmA and LmB).
5
Check all field electrical connections are intact and correct.
Appendix D - Service Issues
CenCon Specific
READ AND SAVE FEATURES
The majority of software settings in the CenCon program are specified at the time of the appliance design.
Some settings can be field adjusted with a computer interface, including temperature and humidity setpoints,
minimum damper position, combustion settings, etc.
The READ USER SETTINGS function references a configuration file located within the CenCon permanent
memory and writes the data values from that table into the relevant parameters on the live system. Any
changes to values on the system that were not previously saved will be overwritten.
The SAVE USER SETTINGS function writes data values from the live system to the permanent memory. This
process will overwrite any previously saved data and will become the new configuration file when the
controller is powered up.
COMMUNICATION ALARM
Check and confirm with correct communication wiring on the internal Modbus network wiring and connections.
ERRATIC BEHAVIOR
During shipping, it is possible for the terminal connectors that plug into the CenCon or expansion modules to
come loose and separate from the controller. When performing the initial start-up of the appliance always
confirm the terminals are firmly embedded into the controller. In addition, check the tightness of all wiring
connections.
HARD RESET BUTTON
Near the edge of the left side face of the CenCon face is a small button which is the hard reset button. If not
correctly aligned with the cover plate, it is possible the button could be constantly depressed. In this
circumstance the display will be blank, the 4 lights on the right side will not be lit, and the controller will be
unresponsive to all commands.
