Self-Test Failed
CyberPower UPS
Severity: ModerateWhat Does This Error Mean?
CyberPower UPS self-test failed means the battery could not sustain load during the test. The battery may just need a full recharge first — plug the UPS in for 8 hours, then run the test again before deciding on a replacement.
Affected Models
- CyberPower CP series
- CyberPower BR series
- CyberPower OR series
- CyberPower PR series
Common Causes
- Battery not fully charged — self-test run too soon after installation or a recent outage
- Aging battery losing capacity (lifespan is typically 3-5 years)
- Battery deeply discharged and not yet recovered
- Faulty battery connection inside the UPS
- Load too high during the self-test