Compaq R12000 XR User Manual page 49

Table 5-1: Main Module and Electronics Modules M1-M4 Active Alarms
LCD Display
X Alarms
Calibration Failed
X Alarms
DC Link Over
Voltage
X Alarms
Fan Failure
X Alarms
Fuse Failure
X Alarms
Heatsink Over
Temperature
X Alarms
Input AC Over
Voltage
Compaq Uninterruptible Power System R12000 XR User Guide
Cause of alarm
The UPS triggers this alarm when the
autocalibration process fails to
complete successfully. This could be
the result of an interruption from an
operating mode transition or because
of UPS load changes occurring while
autocalibration was in progress.
At least one electronics module detects
abnormally high rail voltage levels and
shuts down to protect itself and the
load from damage.
This could be caused by a hardware
failure.
At least one electronics module detects
that one or both of its cooling fans has
failed. The detecting module
immediately shuts down to protect its
heat sensitive components.
The UPS detects that one or more of
the internal module fuses has failed.
An electronics module detects a
heatsink over-temperature condition.
The detecting module immediately
shuts down to protect its heat sensitive
components.
The UPS detects that the input utility
voltage is above the maximum
operating range of about 277v (288v -
hysteresis).
continued
Action to take
The autocalibration process
reschedules and automatically restarts
once the UPS conditions are conducive
for the operation to complete.
Contact Technical Support for
assistance.
Contact Technical Support for
assistance.
Check the fans for blockage. If a fan is
blocked, remove the blockage, switch
to Maintenance Bypass mode, and
restart the system.
If a fan is not blocked and the problem
persists, contact Technical Support for
assistance.
Contact Technical Support for
assistance.
Check the ventilation grills for
blockage. If the grills are blocked,
remove blockage, switch to
Maintenance Bypass mode, and restart
the system. Verify that the ambient
temperature is less than 40°C (104°F).
If the grills are not blocked and the
problem persists, contact Technical
Support for assistance.
If this occurs in a running system, the
system will immediately transition to
Battery mode until valid utility returns. If
this occurs before a system has
entered an online state, its startup
sequence will not complete, and the
system will shut down until valid utility
returns.
If the condition persists, contact an
electrician.
Troubleshooting
continued
5-3