Fan Box (Configuration PFCU)

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

Appearance of the Fan Box(Configuration PFCU)

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

Figure 1 shows the fan box.

Figure 1 Fan box (Configuration PFCU)

(1) PFPU	(2) Fan	(3) PFCU
(4) LED	(5) Screw	(6) Handle

NOTE:

The PFPU is inserted in the rear part of the fan box. It provides power supply for nine fans, keeps the voltage stable through a stabilizing tube, and ensures normal operation of the fans.
The PFCU is the fan control unit. For details on the PFCU, refer to PFCU.

LED on the Fan Box (Configuration PFCU)

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 PFCU)
Color	Status	Meaning
Green	On for 1s and off for 1s	The fan box works normally (the fan box is registered).
Green	On for 0.25s and off for 0.25s	The fan box works normally (the fan box is 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.
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.

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 PFCU)

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 PFCU)
Specification	Value
Height	1.5U (1 U = 44.45 mm)
Input voltage	-60 V DC to -42 V DC
Maximum power	150 W
Temperature	-5℃ to +55℃
Fan speed	The speed of the fans can be adjusted from 50% 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.