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Maintenance and Inspection
8-
15
Memory Backup Battery Replacement Procedure
Replacement Period
A battery for memory backup is provided in the controller.
If the LED indicator lamp BAT ALM lights up, the battery voltage is low. Replace the battery. (We recom-
mend replacing the battery every 5 years regardless of the indicator lamp status.)
If the power supply is turned off while the BAT ALM is lit, the data and calendar settings stored in the mem-
ory may be lost.
Use battery model CR6L-CN014S (see
Replacement Procedure
1. Turn off the power supply.
Always turn off the power supply before replacing the battery.
To retain data in the memory, the battery must be replaced within one hour after the power supply is
turned off. The time that the memory is backed up by the internal capacitor is limited to one hour.
(However, if the internal signal is short-circuited during replacement of the battery, the data in the
memory may be lost. Confirm that the data in the memory is not lost when restarting operation after
replacement of the battery.)
2. Remove the battery.
Touch the controller cover to remove static electricity before starting replacement work.
Remove the cover from the controller. Disconnect the cable from the battery connector, and then
remove the battery from the battery holder.
3. Clean the battery connector.
Clean the battery connector with alcohol or equivalent if there is dust or oil on the connector.
4. Mount a new battery.
Mount a new battery in the battery holder. Confirm the polarities and connect the cable to the battery
connector.
Controller
Battery
Battery connector