Check the battery date. The battery needs replacing after 3 years.
The manufacturing date is listed in the format (year-week) on the battery label.
Servo-i User Manual page 19.
crwdns2944171:0crwdnd2944171:0crwdnd2944171:0crwdnd2944171:0crwdne2944171:0
crwdns2931507:0crwdne2931507:0
crwdns2931509:0crwdne2931509:0
crwdns2931511:0crwdne2931511:0
crwdns2931513:0crwdne2931513:0
crwdns2931515:0crwdne2931515:0
crwdns2931517:0crwdne2931517:0
crwdns2931519:0crwdne2931519:0
crwdns2931521:0crwdne2931521:0
crwdns2931523:0crwdne2931523:0
crwdns2931525:0crwdne2931525:0