HP PowerTrust A3589A, Manual

Page: 131 / 257

Chapter 6 6-15
Troubleshooting
UPS Running on Battery Power with Audible Alarm
UPS Running on Battery Power with Audible Alarm
Case 6 (Normal) — Battery Power
Indicators:
AC Output
lit
Battery Power
lit
Attention
not lit
Caution LED not lit
Enable lit
Audible alarm: 1-beep every 10 seconds
Meaning: The output is enabled, but the battery is supplying the output power. If the
power outage exceeds the battery run-time, all protected equipment must
be shut down.
Cause: 1. Loss of AC power. The UPS is supplying output power from the battery
without input AC to recharge the battery.
2. The UPS may be operating from a line stabilizer, ferro-resonant
transformer, or other types of line conditioners that are causing AC
waveform distortion.
3. The UPS may be operating from distorted AC input waveforms caused
by large phase controlled devices, poor utility power, or poor site power.
4. The UPS may be operating from poor site wiring. Examples include
excessive wire length or improper wire gauge.
5. The UPS may be operating from AC input whose frequency has drifted
outside specified operating frequency limits.
Action: 1. Cause 1 - Verify that the MAIN INPUT circuit breaker is ON and that
the UPS is plugged into a source of AC input power.
• For systems without automatic shutdown procedure:
a. Shut down the operating system.
b. Power-off the protected equipment until AC power returns.
c. When AC power returns, power on the protected equipment.
• For systems with automatic shutdown procedure:
a. No action is required. The HP-UX system will power-down the
UPS automatically.
b. The system will power-up automatically when AC power returns.