Kontron S4600 SEL Troubleshooting - Manual (Page 54)

Power Subsystems
System Event Log Troubleshooting Guide for EPSD Platforms Based on Intel ® Xeon ® Processor E5 4600/2600/2400/1600/1400 Product Families
44 Intel order number G90620-002 Revision 1.1
4.4.5 Power Supply Fan Tachometer Sensors
The BMC polls each installed power supply using the PMBus* fan status commands to check for failure conditions for the power
supply fans.
Table 28: Power Supply Fan Tachometer Sensors Typical Characteristics
Byte Field Description
11 Sensor Type 04h = Fan
12 Sensor Number A0h = Power Supply 1 Fan Tachometer 1
A1h = Power Supply 1 Fan Tachometer 2
A4h = Power Supply 2 Fan Tachometer 1
A5h = Power Supply 2 Fan Tachometer 2
13 Event Direction and
Event Type [7] Event direction
0b = Assertion Event
1b = Deassertion Event
[6:0] Event Type = 03h (“digital” Discrete)
14 Event Data 1 [7:6] – 00b = Unspecified Event Data 2
[5:4] – 00b = Unspecified Event Data 3
[3:0] – Event Trigger Offset = 1h = State Asserted
15 Event Data 2 Not used
16 Event Data 3 Not used
4.4.5.1 Power Supply Fan Tachometer Sensors – Next Steps
These events only get generated in the systems with PMBus*-capable power supplies and normally when the airflow is obstructed to
the power supply:
1. Remove and then reinstall the power supply to see whether something might have temporarily caused the fan failure.
2. Swap the power supply with another one to see whether the problem stays with the location or follows the power supply.
3. Replace the power supply depending on the outcome of steps 1 and 2.
4. Ensure the latest FRUSDR update has been run and the correct chassis is detected or selected.