Fujitsu SE300, Operating Manual

Page: 63 / 86

Net Unit Switches
U41858-J-Z126-1-76
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The following status indicators are possible:
7.1.4 Threshold values for the operating temperature
The device determines the speed of the fans autonomously. The speed cannot be set from
the outside. The table below shows the temperature threshold values which result in the fan
speed increasing.
By default the threshold value for a warning is 10 degrees Celsius lower than the critical
threshold value. As soon as the temperature exceeds the high-limit temperature threshold
(TB), the fan operates at maximum speed. When a lower threshold value is fallen below,
the fan speed is reduced.
LED Display and meaning
PWR (Power) – Does not light up when no power is supplied.
– Lights up green when the internal power supply (PSU) is functioning
normally.
– Lights up yellow when the internal power supply has failed and
power is being supplied from an external power supply (EPS).
Table 4: Meaning of the power status LED indicator
Model Low-limit temperature
TA (°C)
High-limit temperature
TB (°C)
Critical (shutdown)
temperature
TC (°C)
IXC 6450-24 66 71 83
IXC 6450-48 64 69 76
Table 5: Temperature threshold values