Maintenance
4.3.3Limited Life Components
Your Liebert UPS has a design life well in excess of 10 years. Well-maintained units can continue to provide economic benefits for 20 years or more. Long-life components are used in your UPS wherever practical and cost-effective. However, due to current component material and manufacturing technol- ogy limitations, a few components in your Liebert UPS will wear out and require replacement in less than 10 years.
The following limited-life components are utilized in your UPS system. To prevent a wear-out failure of one of these components affecting your critical load operations, Liebert recommends these compo- nents be periodically inspected and replaced before their expected wear-out life. Individual users may have site-specific requirements that differ from these typical life expectations.
| Component | Expected Life | Replace in: |
| | | |
| Power AC filter capacitors | > 7 years | 5 to 6 years |
| (~62,000 hours) |
| | |
| | | |
| Power DC filter capacitors | > 7 years | 5 to 6 years |
| (~62,000 hours) |
| | |
| Low-profile fans | > 7 years | 5 to 6 years |
| (~62,000 hours) |
| | |
| | | |
| Squirrel-cage blowers | 10 years | 8 to 9 years |
| (~87,600 hours) |
| | |
| | | |
| Air filters, disposable | 1 to 3 years | Check four times |
| (see also 4.3.2 - Air Filters) | per year |
| |
| Battery, lithium | 10 years | 8 to 9 years |
| Logic memory backup | (~87,600 hours) |
| |
| | | |
| Battery, storage | | |
| | | |
| Lead-acid wet-cell | 10 to 20 | 1 to 2 years |
| (user selection) | years | prior to end-of-life |
| | | |
| Valve-regulated lead-acid | 5 years | 3 to 4 years |
| (VRLA) | 10 years | 6 to 8 years |
| | | |
Power capacitors are considered “failed” when their measured capacitance is -5% below their name- plate rating. Typically, storage batteries are “worn out” when their full-load reserve time is -20% below rated. Site-specific battery plants may have different end-of-life requirements. Fans and blow- ers typically will stop rotating or rotate slower than expected.
In most cases, replacement components must exactly match the original component specifications and are not readily available from third-party component distributors. For assistance with your specific component specifications, replacement component selection and sourcing, call 1-800-LIEBERT.
For customers using Liebert Global Services (LGS) Preventive Maintenance Services, periodic inspec- tion of these components is part of this service, as well as recommending replacement intervals to cus- tomers to avoid unanticipated interruptions in critical load operations.