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5. Package the defective module in the carton of the new module for return to Carrier.
6. Restore control system power (LID will show ‘‘COMMUNICATION FAILURE’’ at bottom of
screen).
7. Access the SERVICE menu. Highlight and select ‘‘ATTACH TO NETWORK DEVICE.’’
Push the ‘‘ATTACH’’ softkey. (The LID will show ‘‘UPLOADING TABLES. PLEASE WAIT,’’
then show ‘‘COMMUNICATION FAILURE.’’) Press the EXIT softkey.
8. Turn off control power.
9. Mount the new module in the unit control box using a long-shaft Phillips screwdriver and the
screw saved in Step 4 above. Make sure that the green grounding wire is reinstalled along
with the mounting screw.
10. Connect the LID communication wires (CCN bus) and the power wires. If CCN wiring has
been attached to the CCN bus, disconnect the wires. Attach the sensor bus plug and the
input and output plugs.
11. Carefully check all wiring connections before restoring power.
12. Restore control power and verify that the red and green LEDs on the PSIO are functioning
properly.
13. The LID should indicate ‘‘AVAILABLE MEMORY’’ and a value. This value should start to
decrease. (If not, check LID wiring to PSIO, ensure connection to the proper plug.) The
bottom of the screen will indicate ‘‘UPLOADING TABLES, PLEASE WAIT.’’