Installation, continued
15
Replacing the Battery
The MDC2 Controller has a built-in lithium battery
to backup and store the program memory. During
normal use, the battery should last for 10 years.
Replace the battery when the MDC2 Controller no
longer holds the programmed information.
Warning! The components inside the MDC2
Controller are sensitive to electrostatic
discharge. By using a grounding strap, you can
help avoid electrostatic discharge, which can
damage the units.
To replace the battery,
1. Remove the controller cabinet door from its
hinges by opening the door, then pushing the
metal pin up and out of the hinge. Set the door
and pin aside.
2. Unscrew and remove the faceplate. Set the
faceplate aside. Set the faceplate aside.
To prevent electrical shock, turn off the
controller and shut OFF all supply
power to the unit at the Main power
before proceeding. Electrical shock can
cause severe injury or death.
3. Using a Phillips head screwdriver, remove
the five screws, lock washers and metal clip.
Carefully lift the display and control module as
far as the connecting wires allow.
4. Disconnect the two-wire harness from the
board by grasping the connector and pulling
straight up.
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