Real-Time Clock Failure - GE 3500/20 Operation And Maintenance Manual

3500/20 Rack Interface Module Operation and Maintenance Manual
Upgrade Firmware IC Installation
Install the upgrade firmware IC into the PWA. Be sure to match the notched end of
the IC to the notched end of the socket. Ensure that the IC is firmly seated in the
socket.
Top Shield Replacement
Replace the top shield. Position the notch on the top shield so that it is at the top left
corner of the module as shown in the diagram under "Top Shield Removal". Align the
holes in the top shield with the standoffs and press down around each standoff until
they snap in place.

5.3 Real-Time Clock Failure

The Real-Time Clock component on the Rack Interface Module uses an internal
lithium battery that must be replaced every 3 to 10 years. The replacement
interval depends on environmental conditions such as operating temperature. A
discharged lithium battery may cause loss of operating information if the rack
loses power. Refer to the System Event List Messages in Section 6 for the
message that will be displayed when the Real-Time Clock must be replaced.
Contact your nearest Bently Nevada office for instructions on how to handle this.
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