IBM 8676 Hardware Maintenance Manual - Page 117
System, shutdown, Voltage, related, system
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Note: See "System" on page 112 to determine which components should be replaced by a field service technician. Message Action Power supply x fan fault (level-critical; fan v Replace power supply x. fault in power supply x) Power supply x 12 V fault (level-critical; overcurrent condition detected) v See "Power checkout" on page 28. Power supply x 3.3 V fault (level-critical; 3.3 V power supply x had an error) v See "Power checkout" on page 28. Power supply x 5 V fault (level-critical; 5 V v See "Power checkout" on page 28. power supply x had an error) 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 1. Check connections to the power subsystem. (level-warning; indicated voltage supply under nominal value; value for x can be +12, 2. Power supply. -12, or +5) System shutdown Refer to the following tables when experiencing system shutdown related to voltage or temperature problems. Voltage related system shutdown Note: See "System" on page 112 to determine which components should be replaced by a field service technician. Message 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 28. 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 1. Check the power-supply connectors. (level-critical system shutoff due to x supply under voltage) 2. Power supply. System shutoff due to VRM x over voltage v Replace VRM x. System shutoff due to excessive (< 240 1. See "Power checkout" on page 28. VA) loading 2. Cycle ac on/off. Chapter 6. Symptom-to-FRU index 107