MatrixMonitor™ IOM - Rev 4 - 4/11/2013
Page 58
Repair and Replacement
Remove the Swing out Graphic Panel
The mother board which houses the embedded
RCM3000 processor board and the keypad display
panel are mounted on the swing out graphic panel.
These parts can be accessed by loosening the two
captive screws on the right side of the panel
(opposite the hinges) and swinging the panel open.
Because of the tiny nature of the fasteners used to
hold those parts together it is very difficult to
remove and reinstall the fasteners when the swing
out panel is inside of the NEMA 4 control enclosure
and mounted on the side of an air handling unit. It
is best to remove the swing out graphic panel from
the control enclosure and work on the attached
parts on a table or bench.
WARNING
The wiring connections to the MatrixMonitor™ should only be made when the power is disconnected. Failure
to disconnect power before servicing can cause severe personal injury or death.
To remove the swing out graphic panel:
1.
Disconnect the AC power that supplies the MatrixMonitor™ .
2.
Open the clear cover of the ABS NEMA 4 control enclosure.
3.
Loosen the two captive screws on the right side of the panel (opposite the hinges) being
careful not the pull off the rubber O-rings that keep them captive to the panel. Leave the
captive screws on the panel.
4.
Swing the panel out to expose the mother board
and pull off any of the terminal strips on the
mother board that have wiring connections on
them. It is not necessary to remove the
individual wires because all of the connections to
the mother board are made on two part pull out
terminal strips. Carefully note the location of
each strip so they can be correctly reinstalled.
5.
There are two hinges on the left side of the
graphic panel that are fastened to the panel with
two machine screws at each hinge. Remove one
