HP PowerTrust A3589A, Manual

Page: 121 / 257

Chapter 6 6-5
Troubleshooting
Overtemperature Considerations
Overtemperature Considerations
Overtemperature sensing is done inside the Electronics Unit for the protection of the
internal components of the UPS. Refer to the temperature specifications for your system in
Table 1-2. Overtemperature can occur under a variety of conditions, but is most often the
result of rising ambient temperatures, blocked airflow of the cooling fan, or blocked outlet
holes. The key to preventing overtemperature warnings or shutdowns is to keep the
immediate area around the UPS clear for air flow and heat dissipation purposes.
If the installation site is kept within the operating temperature specifications, there
should be no overtemperature problems with the UPS. If the installation site conditioning
equipment (air or humidity conditioners) fail, closely monitor all electronic equipment at
the site for temperature warnings. Have the conditioning equipment repaired and
returned to service as soon as possible.
Two possible scenarios may cause an overtemperature condition:
1. If the UPS is supplying output power using normal AC line voltage when an
overtemperature condition occurs:
a.
Attention
light flashes twice quickly every 10 seconds.
b. Audible alarm beeps three times every 10 seconds.
c. The UPS continues to supply AC output.
d. The UPS may enter Automatic Bypass mode or shutdown depending on the load and
line conditions.
e. Refer to Case 3 (Abnormal) — Overtemperature Condition for actions.
2. If the UPS is supplying output power from batteries when the overtemperature
condition occurs:
a.
Attention
light flashes twice quickly every 10 seconds.
b. The UPS sends a message to the console warning of the high temperature condition.
c. Audible alarm beeps three times every 10 seconds.
d. If the temperature is above 40
°
C, the UPS may shutdown.
e. Refer to “Case 11 (Normal, Abnormal) — Overtemperature Shutdown” for actions.