Replacement timing for consumables

Consumableeplacement TimingModel
Backup battery (5ZVL1200)approx. every 5 yearsNL-20,21,22,31,32
VM-53,53A,54
Backup battery (5ZNS6210)approx. every 5 yearsNA-28,VA-12,SA-78
NL-42,52,62
Waterproofing silicon tubeapprox. every 5 yearsNL-42,52,62
* The backup battery replacement cycle will vary, depending on usage environment, power-on time and other factors that affect the charge retention capability of the battery.
* Periodic replacement of the backup battery is recommended, to ensure that clock settings, stored data etc. are maintained.
* Periodic replacement of the silicon tube is recommended, to prevent loss of waterproofing due to aging of the tube.