Storage Server Fan - IBM TotalStorage DS4400 User Manual

Figure 38. Battery CRU indicator lights
11. After your battery has completed the self test, reset the battery installation date

Storage server fan

The storage server fan is a single, removable unit containing two cooling fans and
temperature monitoring circuitry. The storage server fan plugs directly into a slot on
the front of the DS4400 Storage Server, to the left of the controllers (see Figure 40
on page 51). Five indicator lights provide overall system status information (see
Figure 41 on page 52). The dual fans in the storage server fan unit provide a
redundant cooling system to both controller CRUs. If one fan fails, the other
continues to operate, providing sufficient air circulation to prevent the controllers
from overheating until you can replace the entire storage server fan.
To prevent cooling problems, the DS4400 Storage Server must have proper air
circulation throughout the chassis. Cooling problems include any malfunctions or
obstructions that impede air flow and cause one or more components in the
DS4400 Storage Server to overheat. Make sure that the ambient air temperature
around the DS4400 Storage Server is within the environmental requirements. To
boost air circulation, the DS4400 Storage Server chassis has air vents along its top
and sides. These vents serve as air intake and exhaust passages. Always keep
vents clean and free of obstructions (Refer to the IBM DS4400 Fibre Channel
Storage Server Installation Guide for operating specifications).
Figure 39 on page 50 shows the DS4400 Storage Server air flow. Make sure your
installation site allows adequate ventilation to the DS4400 Storage Server during
operation.
Fault-B
Amber light indicates a fault in
the left battery bank.
Normal status: Off
Problem status: On
Full Charge-B
Green light indicates the left
battery bank is fully charged.
Normal status: On
Problem status: Off
Charging status: Blinking
Note: If the Full Charge-A and the Full Charge-B indicator lights are blinking,
the battery is in the process of charging.
using the storage-management software. The software continues to issue
battery-related errors if the installation date is not reset.
Chapter 3. Replacing DS4400 Storage Server components
Full Charge-A
Green light indicates the right
battery bank is fully charged.
Normal status: On
Problem status: Off
Charging status: Blinking
Fault-A
Amber light indicates a fault
in the right battery bank.
Normal status: Off
Problem status: On
49