Fan Box (Configuration PFCB)

This describes the appearance, LEDs, and technical specifications of the fan box that is configured with the PFCB.

Appearance of the Fan Box (Configuration PFCB)

The fan box consists of the fans, boards, LED, and handle.

Figure 1 shows the fan box.

Figure 1 Fan box (Configuration PFCB)

(1) PFCB	(2) Fan	(3) LED
(4) Screw	(5) Handle

NOTE:

The PFCB is the fan control board. For details on the PFCB, refer to PFCB.

LED on the Fan Box (Configuration PFCB)

The fan box uses a bi-color LED.

Table 1 describes the LED on the fan box.

**Table 1** LED on the fan box (Configuration PFCB)
Color	Status	Meaning
Green	On for 1s and off for 1s	The fan box is supplied with power in two ways without any fault (and is registered).
Green	On for 0.25s and off for 0.25s	The fan box is supplied with power in two ways without any fault (not registered).
Red	On for 1s and off for 1s	The fan box is registered and has one of the following problems: One-way power supply to the subrack. Communication failure. Fan stops running or its speed is too low. Fan box in an excessively high temperature or temperature sensor failure. Failure in speed regulation of fan box alarm.
Red	On for 0.25s and off for 0.25s	The fan box is not registered and has one of the following problems: One-way power supply to the subrack. Fan stops running or its speed is too low. Fan box in an excessively high temperature or temperature sensor failure. Failure in speed regulation of fan box alarm.

NOTE:

The fan box is registered means that the fan box communicates with the BSC normally. The fan box is not registered means that the fan box does not communicate with the BSC normally.

Technical Specifications of the Fan Box (Configuration PFCB)

The technical specifications for the fan box consist of height, voltage, maximum power, temperature, and fan speed.

Table 2 lists the technical specifications of the fan box.

**Table 2** Technical specifications of the fan box (Configuration PFCB)
Specification	Value
Height	1.5 U (1 U = 44.45 mm)
Input voltage	-40V DC to -57V DC
Maximum power	150 W
Temperature	-5℃ to +55℃
Fan speed	The speed of the fans can be adjusted from 55% to 100%.

NOTE:

When the BSC is powered on, when a subrack is reset, or when the BSC is upgraded, the fans in all the subracks run at full speed and the alarm LEDs on all the boards blink in a short period. These are normal symptoms during the BSC startup.