HP Array Controller HSG V8.7 Software - Manual (Page 164)

Enclosure Blowers
8–4 UltraSCSI RAID Enclosure
Caution
The only StorageWorks dual-speed blower that is
compatible with this UltraSCSI RAID enclosure is model
DS–BA35X–MK. Do not use the BA35X–MD dual-speed
blower as a replacement.
Error Condition Reporting
The EMU LEDs display both blower and overtemperature error
conditions. See Chapter 3 for blower error conditions and
recommended corrective actions.
Replacing a Blower
When there is a malfunctioning blower, the remaining blowers
operate at high-speed to increase air flow through the
components—enough air to permit continued operation without
corrupting or losing data. However, Compaq recommends replacing a
defective blower immediately. If a blower is removed and not
replaced within approximately 8 minutes, the array controllers will
shut down and then the EMU will turn O
FF the dc power distribution
to protect enclosure components.
Caution
Some array controllers bypass the standby power mode
functionality from the PVA standby power switch. Refer to
the array controller documentation for availability of this
feature.
Complete the procedures in Table 8–1 and Table 8–2 to replace a
blower. Blowers are hot swap components.