Lenovo ThinkSystem SD650 Manual

Also see for 5468: Setup guide Quick start

Complete the following steps:1. If error is not de-asserted after several minutes, check all ten fans are installed.2. Reseat fan module one or two times. If error still persist, replace fan module.• 16 : FAN_Tach_4A: Fan sensor, failure event was asserted, reading value : %RPM (Threshold :1472RPM)Asserted when Fan tach reading is below threshold RPM.SeverityCriticalServiceableAutomatically notify supportUser ActionComplete the following steps:1. If error is not de-asserted after several minutes, check all ten fans are installed.2. Reseat fan module one or two times. If error still persist, replace fan module.• 17 : FAN_Tach_4B: Fan sensor, failure event was asserted, reading value : %RPM (Threshold :1472RPM)Asserted when Fan tach reading is below threshold RPM.SeverityCriticalServiceableAutomatically notify supportUser ActionComplete the following steps:1. If error is not de-asserted after several minutes, check all ten fans are installed.2. Reseat fan module one or two times. If error still persist, replace fan module.• 18 : FAN_Tach_5A: Fan sensor, failure event was asserted, reading value : %RPM (Threshold :1472RPM)Asserted when Fan tach reading is below threshold RPM.SeverityCriticalServiceableAutomatically notify supportUser ActionComplete the following steps:1. If error is not de-asserted after several minutes, check all ten fans are installed.2. Reseat fan module one or two times. If error still persist, replace fan module.• 19 : FAN_Tach_5B: Fan sensor, failure event was asserted, reading value : %RPM (Threshold :1472RPM)Asserted when Fan tach reading is below threshold RPM.212 ThinkSystem SD650 Dual Node DWC Tray and NeXtScale n1200 DWC Enclosure Messages and Codes Reference