Cooling Fan Sensors; Temperature Sensors; Power Supply Module Voltage Sensors; Cooling Fan Sensor Descriptions - Lenovo D1012 Hardware Installation And Maintenance Manual

Cooling fan sensors

Each power supply includes two fans. The normal range for fan speed is 4,000 to 6,000 RPM. When a
fan speed drops below 4,000 RPM, the EMP considers it a failure. The following table lists the description,
location, and alarm condition for each fan. If the fan speed remains under the 4,000 RPM threshold, the
internal enclosure temperature may continue to rise. Replace the power supply reporting the fault.
Table 15 Cooling fan sensor descriptions
Description
Fan 1
Fan 2
Fan 3
Fan 4
During a shutdown, the cooling fans do not shut off. This allows the enclosure to continue cooling.

Temperature sensors

Extreme high and low temperatures can cause significant damage if they go unnoticed. Each power supply
has one temperature sensor.
When a temperature fault is reported, it must be remedied as quickly as possible to avoid system damage.
This can be done by warming or cooling the installation location.
Table 16 Temperature sensor descriptions
Description
Onboard temperature 1
Onboard temperature 2
Onboard temperature 3
(Capacitor temperature)
CM temperature
When a power supply sensor goes out of range, the Fault/ID LED illuminates amber.
Table 17 Power supply temperature sensor descriptions
Description
Power supply 1 temperature
Power supply 2 temperature

Power supply module voltage sensors

Power supply voltage sensors ensure that an enclosure's power supply voltage is within normal ranges.
There are three voltage sensors per power supply.
Table 18 Voltage sensor descriptions
Sensor
Power supply 1 voltage, 12V
32
Location Event/Fault ID LED condition
Power supply 1 < 4,000 RPM
Power supply 1 < 4,000 RPM
Power supply 2 < 4,000 RPM
Power supply 2 < 4,000 RPM
Normal operating
range
0C–70C
0C–70C
0C–70C
5C–50C
Normal operating range
–10C–80C
–10C–80C
Event/Fault LED condition
< 1 1.00V
> 13.00V
Warning operating Critical operating
range range
None None
None None
None None
 5C,
0C,
 50C  55C
Shutdown values
None
None
None
None