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Zodiak Installation and Service Manual
Section 4 — Maintenance
WARNING
Shut off power to the Main panel when removing or replacing Main panel
circuit boards.
Crosspoint Switch Board
To remove and replace the Crosspoint Switch Board on the Main panel lid:
1.
Turn off the power to the power supplies inside the Main panel tub
(
).
2.
Remove the three screws securing the Control Panel Processor board’s
metal cover to the Main panel tub and remove the cover.
3.
Disconnect the ribbon cable attached to the Control Panel Processor
board by simultaneously pushing the cable connector’s left and right
ejector tabs outward and pulling the cable up and out of the connector.
4.
Support the board as you remove the 20 screws that secure the
Crosspoint Switch board to the Main panel lid. Carefully remove the
board.
5.
Install the replacement board by reversing
through
turn the power back on to the Main panel.
6.
Make sure you have not left any spare hardware or tools inside the
panel and the replacement board is cabled correctly.
7.
Test the new board for proper operation.
M/E Switch Board
To remove and replace the M/E Switch board on the Main panel lid:
1.
Turn off the power to the power supplies inside the Main panel tub
(
).
2.
Using a 1/8 in. Hex wrench, remove the three Lever Arm handles on
the Main panel Transition subpanels (
).
Figure 93. Main Panel Lever Arms
Transition
Lever Arm
8125_00_20_r0
Transition
Subpanels (3)