IBM 6000R Hardware Maintenance Manual - Page 197

System shutdown Refer to the following tables when experiencing system shutdown related to voltage or temperature problems. Voltage related system shutdown Message System shutoff due to "X" V over voltage (levelcritical; system shutoff due to "X" supply over voltage) System shutoff due to "X" V under voltage (levelcritical system shutoff due to "X" supply under voltage) Action 1. Check power supply connectors 2. Replace power supply 3. Replace power backplane 1. Check power supply connectors 2. Replace power supply 3. Replace power backplane Temperature related system shutdown Message Action System shutoff due to CPU "X" over temperature (level-critical; CPU "X" is over temperature) 1. Ensure system is being properly cooled, see "Temperature checkout" on page 27. 2. Replace CPU "X" System shutoff due to CPU "X" under temperature (level-critical; CPU "X" is under temperature) 1. Ambient temperature must be within normal operating specifications (see "Features and specifications" on page 3. 2. System shutoff due to DASD temperature (sensor X) (level-critical; DASD area reported temperature outside recommended operating range) 1. Ensure system is being properly cooled, see "Temperature checkout" on page 27. System shutoff due to high ambient temperature (levelcritical; high ambient temperature) 1. Ambient temperature must be within normal operating specifications (see "Features and specifications" on page 3. Symptom-to-FRU index 185