Case 5 (Normal) - Overload Warning On-Line - HP PowerTrust A3589A Manual

• The UPS has been placed in Service Bypass (see "Service Bypass" in
Chapter 4).
Abnormal causes of this case are:
• The UPS microprocessor detected a UPS internal failure and placed the
unit in Automatic Bypass mode.
• The Battery Box cable is not connected to the UPS Electronics Unit.
• The Battery Precharge Shorting Plate is not properly installed onto the
corresponding connector blades of the Electronics Unit.
• Deeply discharged (or dead) UPS batteries.
Action: 1. Verify whether the Service Bypass switch is in the
use the procedure in "Taking the UPS Out of Service Bypass Mode" in
Chapter 4 to recover the UPS from Service Bypass.
2. If the Service Bypass switch is in the
in Automatic Bypass. To determine if it got to this state because of an
internal UPS fault or by the normal depression of the red Bypass
Switch Activation Button, turn the Output On/Output Off switch to
Output Off
If the UPS returns to normal (UPS Running on AC Power), then it is
either OK (and must have gotten into Automatic Bypass by normal
depression of the red Bypass Switch Activation Button) or else it has an
intermittent fault that occasionally puts it in Automatic Bypass and
then clears itself.
If the UPS remains in the condition described in this case (with the
Service Bypass switch in the
Output On/Output Off switch), it must be defective.
Case 5 (Normal) — Overload Warning On-Line
Indicators:
AC Output
Battery Power
Attention
Caution LED not lit
Enable lit
Audible Alarm: 1 beep every 10 seconds
Meaning: Indicates an overload condition while the UPS is running On-line. (The
loads attached to the UPS output require more power than the UPS can
support while running On-line).
Cause: Excessive UPS load.
Chapter 6
for one second, and then turn it back to
lit
not lit
flashes once per second
UPS Running on AC Power with Audible Alarm
position, the UPS must be
NORMAL
Output On
position and after toggling the
NORMAL
Troubleshooting
position; if so,
BYPASS
.
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