1-8. Cautions when Replacing the Lithium Battery
The lithium battery is installed on the AT-167A board. This lithium battery is used to back up the real-time clock (RTC).
RTC stops operating when the battery life expires. Replace the battery and reset DATE/TIME in the DATE (C15) of
the CCU CONFIGURATION menu. (Refer to“3. Menu Settings”.)
Part No. Name Usage
1-528-174-72
Lithium Battery (CR2032 type) For internal clock
CAUTION
Ensure that the battery is installed with + and – poles connected to the correct terminals. An incorrect
connection may cause an explosion or leakage of fluid.
1-8-1. Replacing Procedure
1. Remove the AT-167A board. (Refer to “4-5-1. Installing/Removing Plug-in Boards on the Front Side”.)
2. Replace the lithium battery (CR2032) on the AT-167A board.
AT-167A board
Push the lithium battery with
an insulated stick to detach it
from the battery case.
3. Install the removed parts by reversing the steps of removal.
4. Set DATE/TIME in the DATE (C15) of the CCU CONFIGURATION menu. (Refer to“3. Menu Settings”.)
HDCU2500
1-21
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