HP PowerTrust A3589A, Manual, Page: 140 / 257

6-24 Chapter 6
Troubleshooting
UPS Halted (Has No AC Output)
• The Battery Precharge Shorting Plate is not properly installed onto the
corresponding connector blades of the Electronics Unit.
• Deeply discharged (or dead) UPS batteries.
• Internal failure at the UPS input circuits or auxiliary power sources.
• Internal short-circuit or failed component at the output circuits of the
UPS.
Action 1. Verify that the UPS/Battery switch is set to
ENABLE
and verify that the
UPS indicators return to one of the other cases in this chapter.
2. Verify that the Battery Box cable is properly plugged into the
corresponding UPS Electronics Unit connector.
3. Verify that the Battery voltage is normal (see “Checking the Voltage of
a Battery Box or a Battery Pack”).
4. Verify whether the AC input voltage and frequency are within spec.
Correct these if needed. (See Table 1-2 and Figure 1-8 and Figure 1-9.)
5. Once the AC input voltage and frequency return to normal operating
range, or if they were already within normal operating range when
checked, turn-off the MAIN and BYPASS INPUT circuit breakers for a
couple of seconds, and then turn them on. This should awaken the UPS,
causing its visual and audible status indicators to reflect the present
UPS operational status:
• If everything is now OK, the UPS should be operating normally.
• If the AC input voltage or frequency is still not within normal range,
the UPS will be on battery power (see “Case 6 (Normal) — Battery
Power”) or the UPS has a low battery charge (see “Case 7 (Normal)
— Low Battery”).
• If the load is still excessive and the AC input is out-of-spec or absent,
the UPS will warn of an overload on the battery (see “Case 8
(Normal) — Overload Warning on Battery”).
• If the load is still excessive and AC input is in-spec, the UPS will be
in overload shutdown mode (see “Case 10 (Normal or Abnormal) —
Overload or EPO Shutdown”).
• If the UPS internal temperature is still excessive, the unit will be in
an overtemperature condition (see “Case 3 (Abnormal) —
Overtemperature Condition”).
Case 16 (Normal or Abnormal) — Bypass Sleep Mode
Indicators:
AC Output
lit
Battery Power
not lit