HP PowerTrust A3589A, Manual, Page: 133 / 257

Chapter 6 6-17
Troubleshooting
UPS Running on Battery Power with Audible Alarm
Case 8 (Normal) — Overload Warning on Battery
Indicators:
AC Output
lit
Battery Power
lit
Attention
flashes once per second
Caution LED not lit
Enable lit
Audible Alarm: 1 beep every 10 seconds
Meaning: Indicates an overload condition while the UPS is running on battery; that
is, while the AC input is not present or is out-of-spec, but the UPS is still
powering the load. (The load attached to the UPS output require more
power than the UPS can support while running on battery).
Cause: Excessive UPS load.
NOTE
This case is transitory. If the overload condition persists indefinitely, it is
always followed by an overload shutdown (see “Case 10 (Normal or Abnormal)
— Overload or EPO Shutdown”) and then, if the AC input is gone or
out-of-spec for a sufficient time, the UPS switches to Sleep mode (see “Case 15
(Normal or Abnormal) — UPS Off or Asleep”). The duration of the overload
warning is inversely related to the degree of overload: the greater the
overload, the shorter the duration of the warning, and vice versa.
Action 1. Power-off the protected equipment, one-by-one, until the UPS returns
to normal operation.
2. Move the input connections of the equipment that was powered-off in
step 1 to another power source.
NOTE
For information on adjusting the load size, refer to “Sizing the Load” in
Chapter 3 and “Load Testing” in Chapter 5. Call HP Service if you need
assistance in resizing the load.
CAUTION
Do not push the red Bypass Switch Activation button while the UPS is
operating on Battery. Damage to the connected equipment can occur.