IBM 88371RU, Maintenance And Troubleshooting Manual

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Note: See “System replaceable units” on page 122 to determine which components should be replaced by a field
service technician.
Message FRU/action
Power supply x 3.3 V fault (level-critical;
3.3 V power supply x had an error)
v
See “Power checkout” on page 79.
Power supply x 5 V fault (level-critical; 5 V
power supply x had an error)
v See “Power checkout” on page 79.
System running non-redundant power
(level-noncritical; system does not have
redundant power)
1. Add another power supply.
2. Remove options from system.
3. System can continue to operate without redundancy protection if
steps1 and 2 are not followed.
System under recommended voltage for x
(level-warning; indicated voltage supply
under nominal value; value for x can be +12,
-12, or +5)
1. Check connections to the power subsystem.
2. Power supply.
System shutdown
Refer to the following tables when experiencing system shutdown related to voltage
or temperature problems.
Voltage related system shutdown
Note: See “System replaceable units” on page 122 to determine which components should be replaced by a field
service technician.
Message FRU/action
System shutoff due to x current over
max value (level-critical; system drawing
too much current on voltage x bus)
v See “Power checkout” on page 79.
System shutoff due to x V over voltage
(level-critical; system shutoff due to x
supply over voltage)
1. Check the power-supply connectors
2. Power supply.
System shutoff due to x V under voltage
(level-critical; system shutoff due to x
supply under voltage)
1. Check the power-supply connectors
2. Power supply.
System shutoff due to VRM x over
voltage
v
Replace VRM x .
System shutoff due to excessive (< 240
VA) loading
1. See “Power checkout” on page 79.
2. Cycle ac on/off.
Temperature related system shutdown
Note: See “System replaceable units” on page 122 to determine which components should be replaced by a field
service technician.
Message FRU/action
System shutoff due to board over
temperature
(level-critical; board is over temperature)
1. Ensure that the system is being properly cooled ; see “System
reliability considerations” on page 15.
2. Replace board.
Chapter 6. Symptom-to-FRU index
117