Huawei OptiX OSN 8800 Hardware Description page 41

OptiX OSN 8800/6800/3800
Hardware Description
Figure 4-14 Partitioned heat dissipation of the OptiX OSN 8800 T32 subrack
IU37
IU20 IU21 IU22 IU23 IU24 IU25
IU1





The fan tray assembly consists of fans and fan control board.
functional blocks of the fan tray assembly.
Issue 01 (2016-03-10)
FAN1
IU38 IU39 IU40
IU26 IU27
IU2 IU3 IU4 IU5 IU6 IU7
FAN4
Partition 1
If any one of the six fans in the two fan tray assemblies fails, the system can remain operational for a
short term in environments where temperatures range between 0° C to 40° C (32° F to 104° F). To
ensure long-term operation of the system, replace the fan tray assembly in a timely manner.
Short-term operation means that the continuous operating time does not exceed 96 hours and the
accumulated time per year does not exceed 15 days.
Replace the fan tray assembly in either of the following two situations:
Two or more fans fail in one of the two fan tray assemblies.
One or more fans fail in each of the two fan tray assemblies.
In a system that is operating normally, the two fans in the same partition (such as FAN1 and FAN4)
run at the same speed.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
FAN2
IU41 IU42 IU43 IU44 IU45
IU28 IU29 IU30 IU31
IU10
IU9
IU8 IU11 IU12 IU13
IU50
FAN5
Partition 2
4 OptiX OSN 8800 Subrack
FAN3
IU46 IU47 IU48
IU32 IU33 IU34 IU35 IU36
IU14 IU15 IU16 IU17 IU18 IU19
FAN6
Partition 3
Figure 4-15 shows the
IU51
IU50
39