Users Manual Part 2

• If the battery is OK there should be no RTC related alarms reported. There is no need to
change the Site Controller Lithium Battery.
• If the battery still reports RTC related alarms, the battery is not working properly or not
working at all. Proceed to Replacing the Site Controller Lithium Battery on page 333.
8.5.3
Replacing the Site Controller Lithium Battery
CAUTION: Danger of explosion if battery is replaced incorrectly. Replace battery only with the
same or equivalent type recommended by manufacturer. Dispose of used batteries according to
the manufacturers instructions.
Procedure:
1 Examine the contents of the flash filling system using the monitor command SC> attrib.
Record the file attributes for each of the files.
2 WARNING: Shock Hazard. The MTS contains dangerous voltages which can cause
electrical shock or damage to equipment. Turn off the MTS and remove the power
cabling before servicing this equipment. Make sure that all power is off to prevent
accidental contact with high energy and injury to personnel.
Switch the MTS Power Supply Unit OFF.
IMPORTANT: If two PSUs are present, switch off the supplying the Site Controller being
replaced. Do not power down the MTS. In configuration with non-redundant power
connection, the MTS Power Supply Unit can be switched off as an alternative to
removing the cables.
3 Wear an ESD strap and connect its cable to a verified good ground. This strap must be worn to
prevent ESD damage to any components.
4 Tag and disconnect any cabling from the Site Controller.
5 Loosen the two M4X10 captive screws securing the Site Controller to the chassis.
6802800U74-AP
Chapter 8: Site Controller
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