HP Array Controller HSG V8.7 Software - Manual (Page 162)

Enclosure Blowers
8–2 UltraSCSI RAID Enclosure
Figure 8–1 Enclosure Blower Assembly Locations
Enclosure temperature sensors (see Chapter 3) detect overtemperature
conditions or blower malfunctions and alert the user to the problem.
Simultaneously, the EMU causes all operational blowers to operate at
high-speed, increasing air flow through the enclosure to increase
cooling.
• If an overtemperature condition is caused by either the intake air
temperature or exhaust air temperature (backplane) being too
high, the EMU initiates routines that can cause a power shut
down.
• Removing a blower significantly changes the air flow pattern
within the enclosure. The EMU initiates a routine that causes a
power shut down to occur after approximately 8 minutes.
• If two or more nonoperating blowers (that is, not operating or
rotating too slowly) are in the same blower bank (see Figure 8–1),
the EMU initiates a routine that causes a power shut down to
occur after approximately 8 minutes.
Figure C ALLOUTS
Bank A
A1. Blower 1
A2. Blower 2
A3. Blower 3
A4. Blower 4
Bank B
B5. Blower 5
B6. Blower 6
B7. Blower 7
B8. Blower 8
CXO5494B
A1
B5
A2
A3
A4
B6
B7
B8