CriticalServiceableAutomatically 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.• 21 : FAN_Tach_9B: 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.• 22 : FAN_Tach_10A: 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.• 23 : FAN_Tach_10B: 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.Chapter 5. FPC events 215