Message Action12V ″X″ bus fault (level-critical; overcurrentcondition on 12 volt ″X″ voltage bus)See “Power checkout” on page 22.5V fault (level-critical; overcurrent conditionon 5 V subsystem)See “Power checkout” on page 22.System shutdownRefer to the following tables when experiencing system shutdown related to voltageor temperature problems.Voltage related system shutdownMessage ActionSystem shutoff due to ″X″ V over voltage(level-critical; system shutoff due to ″X″supply over voltage)1. Check power supply connectors2. Replace power supply3. Replace power backplaneSystem shutoff due to ″X″ V undervoltage (level-critical system shutoff due to″X″ supply under voltage)1. Check power supply connectors2. Replace power supply3. Replace power backplaneTemperature related system shutdownMessage ActionSystem shutoff due to processor ″X″ overtemperature (level-critical; processor ″X″ isover temperature)1. Ensure system is being properly cooled.2. Replace processor ″X″System shutoff due to processor ″X″under temperature (level-critical; processor″X″ is under temperature)1. Ambient temperature must be within normal operatingspecifications, see “Features and specifications” on page 4.2. Replace processor ″X″System shutoff due to DASD temperature(sensor X) (level-critical; DASD areareported temperature outside recommendedoperating range)1. Ensure system is being properly cooled.2. Replace SCSI BackplaneSystem shutoff due to high ambienttemperature (level-critical; high ambienttemperature)1. Ambient temperature must be within normal operatingspecifications, see “Features and specifications” on page 4.2. Replace Front Panel AssemblySystem shutoff due to faults on eachsupply (level-critical; each installed powersupply encountered a fault condition)1. “Power checkout” on page 22.DASD checkoutMessage ActionHard drive ″X″ removal detected(level-critical; hard drive ″X″ has beenremoved)Information only, take action as appropriate.Symptom-to-FRU index 141
