Robot Controller Battery Replacement for the Internal Clock (RC8/RC8A)

Please read our Legal Disclaimer before executing any steps on this article. 

Robot controller does not have a memory backup battery. However, it  contains a battery that maintains the date and time of the internal  clock.

If the controller is turned off when the battery is low, the internal  clock will be initialized. In this case, the time and date will be  displayed incorrectly, and the Change Battery error will be erroneously  displayed. In addition, an error might occur, leading to immediate stop  during motion. 

The lifetime of the internal clock battery is 10 years. At the biennial inspection, check that the battery's replacement timing. If the replacement timing is prior to the next inspection, before the replacement timing elapses, please contact DENSO Robot service division or a dealer where you have purchased our robot. 

For how to confirm the battery replacement date, refer to "Displaying and Changing Controller Battery Maintenance Schedule Screen" in TEACH PENDANT OPERATION GUIDE or "Setting the next Battery Replacement Date" in MINI PENDANT OPERATION GUIDE.

Step-by-Step Guide

Step1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7 Remove the cooling fan unit in the direction of the arrow.
Step 8 Connect a new backup battery for clock to a free connector.
Step 9 Disconnect the connector to the old backup battery for clock and then remove the old backup battery for clock.
Step 10 Attach the new backup battery for clock.
Step 11 Attach the cooling fan unit in the direction of the arrow.
Step 12
Step 13
Step 14 In the case standard specification, without safety I/O specifications, proceed to step 15.
Step 15

Owner's Manual

https://www.fa-manuals.denso-wave.com/en/usermanuals/005907/