Case 14 (Abnormal) - Battery Precharge Failure - HP PowerTrust A3589A Manual

Troubleshooting
UPS Halted (Has No AC Output)
Meaning: The UPS detected deeply discharged batteries while trying to operate
during a power fail or in the event of abnormal AC input power. This may
be a recoverable condition, unless the batteries are too old or defective.
Alternatively, an internal UPS failure has been detected that does not
require immediate shutdown of the UPS output, for example, a fan failure.
Continuous operation under these conditions could cause a UPS output
shutdown at a later time.
Cause: The UPS fault monitoring circuits have detected a non-fatal internal UPS
fault.
Action: 1. To determine if this is a recoverable condition, use the following
procedure:
a. Verify that normal AC input power is present.
b. If so, place the UPS in Service Bypass Mode (see "Placing the UPS in
c. Set the UPS/Battery switch to
d. Set the UPS/Battery switch back to
e. Set the Bypass switch back to
f. Set the Output On/Output Off switch to
2. If the UPS does not recover, that is, it does not return to normal
operation, call HP Service.
Case 14 (Abnormal) — Battery Precharge Failure
Indicators:
AC Output
Battery Power
Attention
Alarm - none
Precharge Failure LED (red) - lit or flashing
Meaning: The polarity of the batteries is reversed and it is not safe to continue.
Cause: 1. An improperly wired Battery Box or Electronics Unit.
2. A faulty battery cable.
Actions: 1. Make sure the BYPASS and MAIN INPUT circuit breakers are ON.
If the yellow caution light is flashing, do not proceed. Call HP Service. If the
CAUTION
yellow caution light is not flashing, continue.
6-22
Service Bypass Mode" in Chapter 4).
then set it back to
Output On
not lit
not lit
not lit
.
DISABLE
.
ENABLE
.
NORMAL
Output Off
.
for one second, and
Chapter 6