IBM Type 8720, Type 8730 manual Rear view, Blower modules

Rear view

This section identifies the components and indicators on the rear of the BladeCenter T unit.

I/O module 2			I/O module 1
KVM module
	TOP D		TOP D
		2	1
			Alarms
	CRT	MNR
	MJR
Blower module 2
2	4
			1	3
Blower module 4	BTM E		BTM E

LAN module

Blower module 1

Blower module 3

I/O module 4 ESD connector I/O module 3

Blower modules

The blower modules are hot-swap units that are installed into the rear of the system. The BladeCenter T unit comes with four blowers that are in a 3+1 redundancy configuration. All the cooling requirements are met if one blower fails. All blowers contain a backflow device that prevents the system from drawing air into the exhaust port of a failed blower. The management module in the BladeCenter T unit controls the blower speed and detects blower failures.

Error LED

Power LED

Blower

Blower LEDs: The LEDs on each blower provide status information about the blower.

vPower: When this green LED is lit, it indicates that the blower module has power.

vError: This amber LED is lit and stays lit when an error has been detected in the blower. The system error LED on the BladeCenter system-status panels is also lit.

Chapter 1. General information 15