Sun Microsystems 5500, Reference Manual

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10-8 Sun Enterprise 6500/5500/4500 Systems Reference Manual • April 1998
10.7 Defective Power Supplies
The peripheral power supply and power/cooling modules are hot-pluggable.
Caution –
Boards in slots adjacent to a modular power supply may overheat if the
supply is removed and not replaced. The modular power supply provides cooling
air to two board slots.
Caution – Do not hot-plug boards or modules if the peripheral power supply is
defective. The hot-plug feature requires a working peripheral power supply for
precharge current.
FIGURE 10-7
Diagnosing Power Supply Problems
INDICATION
Peripheral power supply:
System error message
Peripheral device fails
PCM:
System error message
Board fails
Begin
End
TEST/PROCEDURE
Verify module is ready:
Green LED off.
Yellow LED may be on.
Before replacing any other
hot-pluggable devices, replace
faulty peripheral power supply
to ensure availability of
precharge current.
Verify PCM is ready:
Green LED off.
Yellow LED may be on.
REFERENCE
See Section 7.3.2
“Replacing a
Peripheral Power
Supply.”
See Section 7.4.4
“Replacing a PCM.”