HP R12000 XR Maintenance And Service Manual page 58

Troubleshooting
Table 5-1: Main Module (MM) and Electronics Modules (M1-M4) Active Alarms
LCD Display
x Alarms
Non-volatile
Memory
Checksum Fail
x Alarms
On Manual Bypass
x Alarms
Output AC Over
Voltage
x Alarms
Output AC Under
Voltage
5-8
HP CONFIDENTIAL Codename: Sierra Part Number: 221273-001 Last Saved On: 7/31/02 8:59 AM
Possible Cause
The UPS detects an EEPROM
Checksum Failure in the electronics
module or supervisory board. This
condition must be resolved before the
UPS can complete its initialization and
start successfully.
This alarm is most common after a
Flash upgrade that requires an
EEPROM upgrade for the new
embedded software to function
correctly. The upgrade documentation
describes this condition.
The UPS has been manually switched
into Manual Bypass mode. The UPS
can no longer protect the load or
condition the utility to the load.
The UPS detects that its output voltage
is higher than its configured operational
range. The UPS immediately initiates a
transfer to Bypass mode, if that mode
is available. If Bypass mode is not
available at the time of this failure, the
UPS shuts down immediately to protect
the load.
This problem could be caused by a
hardware component failure.
This alarm is triggered by one of the
following events:
•
The UPS detects that its output
voltage is lower than its configured
operational range. The UPS
immediately initiates a transfer to
Bypass mode if that mode is
available.
•
A significant change in load or load
types has occurred that is causing
a temporary sag in output
voltage. If Bypass mode is
available, the UPS attempts to
automatically recover and return to
an online mode after a couple of
seconds.
If Bypass mode is not available at
the time of the failure, the UPS
shuts down immediately to protect
the load.
Actions to Take
•
Check the website
(www.hp.com/products/ups) for
Flash upgrades.
•
Upgrade failure: Upgrade the
system in accordance with
applicable documentation.
•
Operational failure: Switch to
Manual Bypass mode. Locate and
replace the faulty module or faulty
supervisory board.
This is a normal operation.
•
Switch to Manual Bypass mode.
Locate and replace the faulty
module or faulty supervisory
board.
•
Verify the output voltage on the
LCD display.
•
Switch to Manual Bypass mode.
Locate and replace the faulty
module or faulty supervisory
board.
•
Verify the output voltage on the
LCD display.
HP UPS R12000 XR Models Maintenance and Service Guide
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