HP R12000 XR Maintenance And Service Manual page 54

Troubleshooting
Table 5-1: Main Module (MM) and Electronics Modules (M1-M4) Active Alarms
LCD Display
x Alarms
Heatsink Over
Temperature
x Alarms
Input AC Over
Voltage
x Alarms
Input AC Under
Voltage
x Alarms
Input Under Or
Over Frequency
5-4
HP CONFIDENTIAL Codename: Sierra Part Number: 221273-001 Last Saved On: 7/31/02 8:59 AM
Possible Cause
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 277 V
(288 V - hysteresis).
The UPS detects that the input utility
voltage is below the minimum operating
range of about 172 V
(160 V + hysteresis).
The UPS detects that the input
frequency has a greater deviation than
± 5 Hz from the nominal window of
operation.
Actions to Take
•
Check the ventilation grills for
blockage. If the grills are blocked,
remove blockage, switch to
Manual 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, switch to Manual
Bypass mode. Locate and replace
the faulty module.
•
If this occurs in a running system,
the system immediately transitions
to Battery mode until valid utility
returns. If this occurs before a
system has entered an online
state, its startup sequence does
not complete and the system shuts
down until valid utility returns.
•
If the condition persists, contact an
electrician.
•
If this occurs in a running system,
the system immediately transitions
to Battery mode until valid utility
returns. If this occurs before a
system has entered an online
state, its startup sequence does
not complete and the system shuts
down until valid utility returns.
•
If the condition persists, contact an
electrician.
•
If this occurs in a running system,
the system regulates output
frequency to its nominal 50 or
60 Hz. If this occurs before a
system has entered an online
state, its startup sequence does
not complete and the system shuts
down until valid utility returns.
•
If the condition persists, contact an
electrician.
HP UPS R12000 XR Models Maintenance and Service Guide
continued
continued