IBM 8682 manual System shutdown, Voltage related system shutdown

Message	Action
Power Supply ″X″ fault	1.	Check error log for other messages.
(level-critical; power supply ″X″ has been removed or has	2.	See “Power checkout” on page 20
encountered some other fault)
Power Supply ″X″ overvoltage fault	1.	See “Power checkout” on page 20.
(level-critical)
Power Supply ″X″ AC power removed, early power-off	1.	Check to see if ac cords are plugged in properly.
warning	2.	Problem may have been temporary ac problem. If
(level-critical; a power supply has been unplugged or has		problem persists, see “Power checkout” on page 20
been installed without an ac cord)
System running non-redundant power	1.	Add another power supply
(level-non-critical; system does not have redundant power)	2.	Remove options from system
	3.	System can continue to operate without redundancy
		protection if 1 and 2 above are not followed.
System under recommended voltage for ″X″ v	1.	Check connections to power subsystem
(level-warning; indicated voltage supply under nominal	2.	Replace power supply
value; value for ″X″ can be +12, -12, or +5)	3.	Replace power backplane
System under recommended voltage on 3.3 v	1.	Check connections to power subsystem
(level-warning; 3.3 volt supply under nominal value)	2.	Replace power supply
	3.	Replace power backplane
″X″ V bus fault	1.	See “Power checkout” on page 20.
(level-critical; overcurrent condition on ″X″ voltage bus)
12V ″X″ bus fault	1.	See “Power checkout” on page 20.
(level-critical; overcurrent condition on 12 volt ″X″ voltage
bus)
5V fault	1.	See “Power checkout” on page 20.
(level-critical; overcurrent condition on 5 V subsystem)

System shutdown

Refer to the following tables when experiencing system shutdown related to voltage or temperature problems.

Voltage related system shutdown

Message	Action
System shutoff due to ″X″ V over voltage	1.	Check power supply connectors
(level-critical; system shutoff due to ″X″ supply over	2.	Replace power supply
voltage)	3.	Replace power backplane
System shutoff due to ″X″ V under voltage	1.	Check power supply connectors
(level-critical system shutoff due to ″X″ supply under	2.	Replace power supply
voltage)	3.	Replace power backplane

120IBM xSeries 350 Type 8682: Hardware Maintenance Manual