Voltage related system shutdownNote: See “System” on page 106 to determine which components a field service technician should replace.Message ActionSystem shutoff due to x current overmax value (level-critical; system drawingtoo much current on voltage x bus)See “Power checkout” on page 19.System shutoff due to x V over voltage(level-critical; system shutoff due to xsupply over voltage)1. Check the power-supply connectors.2. Power supply.3. Power cage assembly.System shutoff due to x V under voltage(level-critical system shutoff due to x supplyunder voltage)1. Check the power-supply connectors.2. Power supply.3. Power cage assembly.System shutoff due to VRM x overvoltageReplace VRM x.System shutoff due to excessive (< 240VA) loading 1. See “Power checkout” on page 19.2. Cycle ac on/off.Temperature related system shutdownNote: See “System” on page 106 to determine which components a field service technician should replace.Message ActionSystem shutoff due to board overtemperature(level-critical; board is over temperature)1. Ensure that the server is being properly cooled; see “Systemreliability guidelines” on page 23.2. Replace board.System shutoff due to CPU x overtemperature (level-critical; CPU x is overtemperature)1. Ensure that the server is being properly cooled; see “Systemreliability guidelines” on page 23.2. Replace CPU x.System shutoff due to CPU x undertemperature (level-critical; CPU x is undertemperature)Ambient temperature must be within normal operatingspecifications; see “Features and specifications” on page 3.System shutoff due to DASD temperature(sensor x) (level-critical; DASD areareported temperature outside recommendedoperating range)Ensure that the system is being properly cooled; see “Systemreliability guidelines” on page 23.System shutoff due to high ambienttemperature(level-critical; high ambient temperature)Ambient temperature must be within normal operatingspecifications; see “Features and specifications” on page 3.System shutoff due to system boardunder temperature(level-critical; system board is undertemperature)Ambient temperature must be within normal operatingspecifications; see “Features and specifications” on page 3.Chapter 6. Symptom-to-FRU index 101