IBM 86655RY - Netfinity 7600 - 8665, Hardware Maintenance Manual, Page: 248 / 294

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Hardware Maintenance Manual: Netfinity 7600 – Type 8665 Models 1RY, 2RY
System shutdown
Refer to the following tables when experiencing system shutdown related to voltage
or temperature problems.
Power related system shutdown
System under recommended voltage for "X" v
(level-
warning; indicated voltage supply under nominal value;
value for "X" can be +12, -12, or +5)
1.
Check connections to power subsystem
2. Replace power supply
3. Replace power backplane
System under recommended voltage on 3.3 v (level-
warning; 3.3 volt supply under nominal value)
1. Check connections to power subsystem
2. Replace power supply
3. Replace power backplane
System under recommended X current (level-non-critical;
system drawing less current than recommended on voltage
"X")
1. See “Power checkout” on page 31.
"X" V bus fault (level-critical; overcurrent condition on "X"
voltage bus)
1. See “Power checkout” on page 31.
12V "X" bus fault (level-critical; overcurrent condition on
12 volt "X" voltage bus)
1. See “Power checkout” on page 31.
5V fault (level-critical; overcurrent condition on 5 V
subsystem)
1. See “Power checkout” on page 31.
240 VA bus fault (level-critical; overcurrent or overvoltage
condition in power subsystem)
1. See “Power checkout” on page 31.
Message Action
System powered off due to "X" current over max value
(level-critical; system drawing too much current on
voltage "X" bus)
1. See “Power checkout” on page 31.
System shutoff due to "X" current under min value
(level-critical; current on voltage bus "X" under minimum
value)
1. See “Power checkout” on page 31.
System shutoff due to "X" V over voltage (level-critical;
system shutoff due to "X" supply over voltage)
1. Check power supply connectors
2. Replace power supply
3. Replace power backplane
System shutoff due to "X" V under voltage (level-critical
system shutoff due to "X" supply under voltage)
1. Check power supply connectors
2. Replace power supply
3. Replace power backplane
System powered off due to faults on each power supply. 1. See “Power checkout” on page 31.
Message Action