base
A
37
IOM74 November 2020 R105
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 – Address Settings
The expansion modules must have the rotary address pot in the back of the PCB selected to correctly function.
These are normally set from the PCB manufacturer, however in appliances with multiple modules of the same
type it will need to be factory adjusted. The settings are also noted on the electrical diagram.
CD-XM
Appendix E - Service Issues
READ AND SAVE FEATURES
The majority of software settings 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 SETTINGS function references a configuration file located within the base 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 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.
Do not power cycle during Read/Save process.
COMMUNICATION ALARM
Check and confirm 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 base or CD-XM expansion module
to come loose and separate from the controller. When performing the initial start-up of the appliance always
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