44E5083 IBM Blower Module, BladeCenter H 8852/7989/1886

The IBM 44E5083 is the standard blower module for the IBM BladeCenter H, machine types 8852, 7989 and 1886. It fits older chassis with chassis hardware version v6 or earlier. Newer chassis, hardware version v8 or later, use the enhanced (high-efficiency) blower module 68Y8205 instead.

The standard blower module 44E5083 and the high-efficiency module 68Y8205 are not interchangeable and must not be mixed in the same BladeCenter unit. A failed blower module is replaced only with the same type. The chassis hardware version is visible in the chassis hardware data in the Advanced Management Module.

The BladeCenter H has two hot-swap blower bays holding variable-speed blowers, which provide redundant cooling for the chassis. The Management Module throttles the blowers to match the ambient temperature, and the default speed is 100 percent. If the Management Modules are removed or cannot communicate with the blowers, all blowers ramp up to full speed.

When a blower module is pulled from its bay, another blower module has to be installed within 1 minute. If all blowers are removed or powered off, the whole chassis powers off within seconds. At least one blower needs to run at all times while blowers are moved in and out. A blower that runs dramatically slower than the other can trigger Chassis Cooling Device entries in the Management Module event log, and the blower VPD may be missing.