Specifications

System Chassis and Sub-Assemblies QSSC-S4R Technical Product Specification
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Figure 37. Power Supply Indicators
Note: The cooling system is non-redundant if only two power supplies are installed in the Value SKU.
Caution Power supplies must be hot swapped within three minutes to prevent overheating. This time period
applies only to the time that the power supply is physically removed, not from the time of failure.
Table 35. Power supply indicators
Power supply condition Status LED (A) Fail LED (B) AC LED (C)
No AC power to any of the power supplies OFF OFF OFF
AC Cord Unplugged 0.5 Hz blinking
green
OFF OFF
AC Present but only 3.3VSB on (PS off (or power
supply in cold redundant state.
1 HZ blinking
green
OFF Solid green
Output On and OK Solid green OFF Solid green
Power supply warning events where the power
supply continues to operate: High temperature,
high power, high current, slow fan.
1 Hz blinking
amber
OFF Solid green
Power supply critical event causing a shutdown:
failure, overcurrent, overvoltage, or fan failure.
OFF Amber Solid green
10.2.2 Fan Subsystem
QSSC-S4R supports eight hot swap fan modules that are located at the upper front of the chassis and can be removed
inside the chassis with the chassis cover removed (See Figure 38. Fan Location). The fans are docked on the front
panel fan board (FPFB). Each fan module has an amber LED wired to the front panel fan board. The LED will turn on
when the fan is not functioning within specifications.
10.2.2.1 80x80x38mm Fan Modules
The S4R fan modules support the following features:
x Form factor: 80x80x38mm fans
x Hot swap blind-mate connector
x Fan presence, PWM, tachometer, and fault signals
x Support Fault LED
x RV isolation
x Tool-less service at the module level
x Keying feature that prevents incorrect installation