Defective Power Supplies

The auxiliary peripheral power supply and power/cooling modules (PCMs) are hot-pluggable.

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Caution -

Boards in slots adjacent to a PCM may overheat if the supply is removed and not replaced. The PCM provides cooling air to two board slots.

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Caution -

Do not hot-plug boards or modules if the peripheral power supply/AC is defective. The hot-plug feature requires a working PPS/AC for precharge current.

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Table 10-6 Power Supply Problems

Indication	Test/Procedure	Reference
For Peripheral power supply: System error message Peripheral device fails	Verify module is ready: --Green LED off. --Yellow LED may be on.	See Chapter 7, Power Supplies.
	Before replacing any other hot-pluggable devices, replace faulty peripheral power supply to ensure availability of precharge current.
For PCM: System error message Board fails	Verify PCM is ready: --Green LED off. --Yellow LED may be on.	See "Power/Cooling Module (PCM)".