KOLFF Black 1K, Руководство пользователя

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9. Maintenance
9.1 Operation
The UPS system contains no user-serviceable parts. If the battery
service life (3~5 years at 25
°
C ambient temperature) has been
exceeded, the batteries must be replaced. In this case please contact
your dealer.
9.2 Storage
If the batteries are stored in temperate climatic zones, they should be
charged every three months for 1~2 hours. You should shorten the
charging intervals to two months at locations subject to high
temperatures.