HP 5920 User manual

HP 5920&5900 Switch Series
Installation Guide
Part number: 5998-2852
Document version: 6W102-20131130
5998-2852

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herein.

i
Contents
Preparing for installation ············································································································································· 1
Safety recommendations ··················································································································································2
Examining the installation site ·········································································································································3
Temperature/humidity ·············································································································································3
Cleanness··································································································································································3
EMI·············································································································································································4
Laser safety································································································································································4
Installation tools·································································································································································4
Installing the switch······················································································································································ 5
Installing the switch in a 19-inch rack·····························································································································5
Installation prerequisites ··········································································································································5
Mounting bracket and rack mounting rail kits ······································································································6
Rack-mounting procedures at a glance··················································································································7
Attaching the mounting brackets, chassis rails, and grounding cable to the chassis·······································7
Attaching the slide rails to the rack ····················································································································· 10
Mounting the switch in the rack··························································································································· 11
Grounding the switch ···················································································································································· 12
Grounding the switch with a grounding strip····································································································· 13
Grounding the switch by using the AC power cord·························································································· 14
Installing/removing a fan tray······································································································································ 15
Installing a fan tray ··············································································································································· 15
Removing a fan tray·············································································································································· 16
Installing/removing a power supply ···························································································································· 17
Installing a power supply ····································································································································· 17
Removing a power supply···································································································································· 18
Connecting the power cord ·········································································································································· 20
Connecting the 650W AC power supply ·········································································································· 20
Connecting the 650W DC power supply··········································································································· 20
Verifying the installation················································································································································ 21
Accessing the switch for the first time·······················································································································22
Setting up the configuration environment···················································································································· 22
Connecting the console cable ······································································································································ 22
Console cable························································································································································ 22
Connection procedure ·········································································································································· 22
Setting terminal parameters ·········································································································································· 23
Powering on the switch·················································································································································· 26
Setting up an IRF fabric ·············································································································································27
IRF fabric setup flowchart·············································································································································· 27
Planning IRF fabric setup··············································································································································· 28
Planning IRF fabric size and the installation site································································································ 28
Identifying the master switch and planning IRF member IDs ············································································ 28
Planning IRF topology and connections ·············································································································· 29
Identifying physical IRF ports on the member switches ····················································································· 30
Planning the cabling scheme ······························································································································· 30
Configuring basic IRF settings······································································································································· 32
Connecting the physical IRF ports ································································································································ 32
Accessing the IRF fabric to verify the configuration ··································································································· 32

ii
Maintenance and troubleshooting····························································································································34
Power supply failure ······················································································································································ 34
Fan failure······································································································································································· 34
Configuration terminal problems·································································································································· 34
No terminal display ·············································································································································· 34
Garbled terminal display······································································································································ 35
Appendix A Chassis views and technical specifications ························································································36
Chassis views ································································································································································· 36
HP 5920AF-24XG/HP 5920AF-24XG TAA ······································································································ 36
HP 5900AF-48XG-4QSFP+/HP 5900AF-48XG-4QSFP+ TAA/HP 5900CP-48XG-4QSFP+/HP
5900CP-48XG-4QSFP+8Gb FC B-F ··················································································································· 37
HP 5900AF-48XGT-4QSFP+································································································································ 38
HP 5900AF-48G-4XG-2QSFP+ ··························································································································· 39
Technical specifications················································································································································· 40
Appendix B FRUs and compatibility matrixes··········································································································43
Hot swappable power supplies···································································································································· 43
Hot swappable fan trays··············································································································································· 43
Appendix C Ports and LEDs ······································································································································46
Ports ················································································································································································· 46
Console port ·························································································································································· 46
Management Ethernet port··································································································································· 46
USB port ································································································································································· 46
SFP+ port································································································································································ 47
QSFP+ port ···························································································································································· 49
10/100/1000Base-T autosensing Ethernet port······························································································· 50
1/10GBase-T autosensing Ethernet port ············································································································ 51
LEDs ················································································································································································· 51
System status LED··················································································································································· 51
SFP+ port LED ························································································································································ 52
QSFP+ port LED····················································································································································· 52
Management Ethernet port LEDs·························································································································· 52
10/100/1000Base-T autosensing Ethernet port LEDs······················································································ 53
1/10GBase-T autosensing Ethernet port LEDs ··································································································· 53
Appendix D Cooling system······································································································································54
HP 5920 cooling system ··············································································································································· 54
HP 5900 cooling system ··············································································································································· 55
Support and other resources ·····································································································································57
Contacting HP ································································································································································ 57
Subscription service ·············································································································································· 57
Related information························································································································································ 57
Documents······························································································································································ 57
Websites································································································································································· 57
Conventions ···································································································································································· 58
Index ···········································································································································································60

1
Preparing for installation
Table 1 describes the HP 5920 and 5900 Switch Series models and power supplies.
Table 1 HP 5920 and 5900 Switch Series models and power supplies
Product code HP description Alias
HP 5920 switches:
JG296A HP 5920AF-24XG Switch HP 5920AF-24XG
JG555A HP 5920AF-24XG TAA-compliant Switch HP 5920AF-24XG TAA
HP 5900 switches:
JC772A HP 5900AF-48XG-4QSFP+ Switch HP 5900AF-48XG-4QSFP+
JG554A HP 5900AF-48XG-4QSFP+ TAA-compliant Switch
HP 5900AF-48XG-4QSFP+ TAA
JG838A HP FlexFabric 5900CP-48XG-4QSFP+ Switch HP 5900CP-48XG-4QSFP+
E7W29A HP StoreFabric 5900CP-48XG-4QSFP+8Gb FC
B-fan Trays Converged Switch
HP 5900CP-48XG-4QSFP+8Gb FC
B-F
JG336A HP 5900AF-48XGT-4QSFP+ Switch HP 5900AF-48XGT-4QSFP+
JG510A HP 5900AF-48G-4XG-2QSFP+ Switch HP 5900AF-48G-4XG-2QSFP+
Power supplies:
JC680A A58x0AF 650W AC Power Supply 650W AC power supply
JC681A A58x0AF 650W DC Power Supply 650W DC power supply
Fan trays:
JC682A HP A5820AF/A5800AF back (power side) to
front (port side) airflow Fan Tray N/A
JC683A HP A5820AF/A5800AF front (port side) to back
(power side) airflow Fan Tray N/A
JG552A HP X711 Front (port side) to Back (power side)
Airflow High Volume Fan Tray N/A
JG553A HP X712 Back (power side) to Front (port side)
Airflow High Volume Fan Tray N/A
JG297A HP 5920AF-24XG Back (power-side) to Front
(port-side) Airflow Fan Tray N/A
JG298A HP 5920AF-24XG Front (port-side) to Back
(power-side) Airflow Fan Tray N/A
•For regulatory identification purposes, the HP 5920AF-24XG and HP 5920AF-24XG TAA products
are assigned Regulatory Model Numbers (RMN). The Regulatory Model Numbers for these
products are listed below. These regulatory numbers should not be confused with the marketing
names HP 5920AF, or product numbers JG296A and JG555A.
Product code RMN HP description

2
Product code RMN HP description
JG296A BJNGA-AC0007 HP 5920AF-24XG Switch
JG555A BJNGA-AC0007 HP 5920AF-24XG TAA-compliant Switch
•For regulatory identification purposes, the HP 5900AF-48XG-4QSFP+ and HP
5900AF-48XG-4QSFP+ TAA products are assigned Regulatory Model Numbers (RMN). The
Regulatory Model Numbers for these products are listed below. These regulatory numbers should
not be confused with the marketing names HP 5900AF, or product numbers JC772A and JG554A.
Product code RMN HP description
JC772A BJNGA-AD0016 HP 5900AF-48XG-4QSFP+ Switch
JG554A BJNGA-AD0016 HP 5900AF-48XG-4QSFP+ TAA-compliant
Switch
•For regulatory identification purposes, the HP FlexFabric 5900CP-48XG-4QSFP+ Switch and HP
StoreFabric 5900CP-48XG-4QSFP+ 8Gb FC B-fan Trays Converged Switch product are assigned
Regulatory Model Number (RMN). The Regulatory Model Number for these products is listed
below. This regulatory number should not be confused with the marketing names HP FlexFabric
5900CP, HP StoreFabric 5900CP, or product numbers JG838A, E7W29A.
Product code RMN HP description
JG838A BJNGA-AD0023 HP FlexFabric 5900CP-48XG-4QSFP+ Switch
E7W29A BJNGA-AD0023 HP StoreFabric 5900CP-48XG-4QSFP+ 8Gb
FC B-fan Trays Converged Switch
•For regulatory identification purposes, the HP 5900AF-48XGT-4QSFP+ Switch is assigned a
regulatory model number (RMN) BJNGA-AD0018. This regulatory number should not be confused
with the marketing name HP 5900AF, or product code JG336A.
•For regulatory identification purposes, the HP 5900AF-48G-4XG-2QSFP+ Switch is assigned a
regulatory model number (RMN) BJNGA-AD0017. This regulatory number should not be confused
with the marketing name HP 5900AF, or product code JG510A.
Safety recommendations
To avoid any equipment damage or bodily injury, read the following safety recommendations before
installation. Note that the recommendations do not cover every possible hazardous condition.
•Before cleaning the switch, unplug all power cords from the switch. Do not clean the switch with wet
cloth or liquid.
•Do not place the switch near water or in a damp environment. Prevent water or moisture from
entering the switch chassis.
•Do not place the switch on an unstable case or desk. The switch might be severely damaged in case
of a fall.
•Ensure good ventilation of the equipment room and keep the air inlet and outlet vents of the switch
free of obstruction.
•Make sure the operating voltage is in the required range.

3
•To avoid electrical shocks, do not open the chassis while the switch is operating or when the switch
is just powered off.
•When replacing FRUs, including power supplies and fan trays, wear an ESD wrist strap to avoid
damaging the units.
Examining the installation site
The HP 5920 and 5900 switches must be used indoors.
Mount your switch in a rack and make sure:
•Adequate clearance is reserved at the air inlet and exhaust vents for ventilation.
•The rack has a good ventilation system.
•Identify the hot aisle and cold aisle at the installation site, and make sure ambient air flows into the
switch from the cold aisle and exhausts to the hot aisle.
•Identify the airflow designs of neighboring devices, and prevent hot air flowing out of the bottom
device from entering the top device.
•The rack is sturdy enough to support the switch and its accessories.
•The rack is correctly grounded.
To ensure normal operation and long service life of your switch, install it in an environment that meets the
requirements described in the following subsections.
Temperature/humidity
Maintain appropriate temperature and humidity in the equipment room.
•Lasting high relative humidity can cause poor insulation, electricity creepage, mechanical property
change of materials, and metal corrosion.
•Lasting low relative humidity can cause washer contraction and ESD and bring problems including
loose captive screws and circuit failure.
•High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the switch.
For the temperature and humidity requirements of different switch models, see "Appendix A Chassis
views and technical specifications."
Cleanness
Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of metal
components and contact points, especially when indoor relative humidity is low. In the worst case,
electrostatic adsorption can cause communication failure.
Table 2 Dust concentration limit in the equipment room
Substance Concentration limit (particles/m³)
Dust ≤3 x 104 (no visible dust on the tabletop over three days)
NOTE:
Dust diameter ≥5 μm

4
The equipment room must also meet limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown in Table 3.
Table 3 Harmful gas limits in the equipment room
Gas Maximum concentration (mg/m3)
SO20.2
H2S 0.006
NH30.05
Cl20.01
EMI
Electromagnetic interference (EMI) might be coupled from the source to the switch through the following
coupling mechanisms:
•Capacitive coupling
•Inductive coupling
•Radiative coupling
•Common impedance coupling
•Conductive coupling
To prevent EMI, take the following actions:
•If AC power is used, use a single-phase three-wire power receptacle with protection earth (PE) to
filter interference from the power grid.
•Keep the switch far away from radio transmitting stations, radar stations, and high-frequency
devices to make sure the EMI levels do not exceed the compliant range.
•Use electromagnetic shielding, for example, shielded interface cables, when necessary.
•To prevent signal ports from getting damaged by over-voltage or over-current caused by lightning
strikes, only route interface cables indoors.
Laser safety
W
ARNING!
Do not stare into any fiber port when the switch has power. The laser li
g
ht emitted from the optical fiber
might hurt your eyes.
The HP 5920 and 5900 switches are Class 1 laser devices.
Installation tools
•Phillips screwdriver
•ESD wrist strap
All these installation tools are user supplied.

5
Installing the switch
CAUTION:
Keep the tamper-proof seal on a mountin
g
screw on the chassis cover intact, and if you want to open the
chassis, contact HP for permission. Otherwise, HP shall not be liable for any consequence caused thereby.
Figure 1 Hardware installation flow
Installing the switch in a 19-inch rack
Installation prerequisites
The rack depth for the HP 5920AF-24XG, 5920AF-24XG TAA, 5900AF-48XGT-4QSFP+,
5900AF-48XGT-4QSFP+ TAA, 5900CP-48XG-4QSFP+, 5900CP-48XG-4QSFP+8Gb FC B-F, and
5900AF-48XG-4QSFP+ must be 1000 mm (39.37 in).
The distance from the front to the rear posts of the rack must meet the requirements described in Table 4.
You must use both the mounting bracket and the rack mounting rail kit to rack-mount the switch.

6
Table 4 Requirements for the distance from the front to rear posts
Switch model Installation method Minimum distance Maximum distance
•HP 5920AF-24XG
•HP 5920AF-24XG TAA
Using mounting
brackets and short slide
rails (supplied with the
switch)
401 mm (15.79 in) 895 mm (35.24 in)
•HP 5900AF-48XG-4QSFP+
•HP 5900AF-48XG-4QSFP+
TAA
•HP 5900CP-48XG-4QSFP+
•HP
5900CP-48XG-4QSFP+8G
b FC B-F
•HP 5900AF-48XGT-4QSFP+
Using mounting
brackets and short slide
rails (supplied with the
switch)
405 mm (15.94 in) 854 mm (33.62 in)
HP 5900AF-48G-4XG-2QSFP+
Using mounting
brackets and short slide
rails (supplied with the
switch)
401 mm (15.79 in) 654 mm (25.75 in)
Using mounting
brackets and long slide
rails (optional)
621 mm (24.45 in) 874 mm (34.41 in)
Mounting bracket and rack mounting rail kits
Every HP 5920 and 5900 switch comes with a pair of mounting brackets and a rack mounting kit that
includes a pair of chassis rails and a pair of slide rails. See Figure 2 and Figure 3.
Figure 2 1U mounting bracket kit
Figure 3 Rack mounting rail kit

7
(1) Chassis rail (2) Slide rail
Rack-mounting procedures at a glance
Figure 4 Rack-mounting procedure
NOTE:
If a rack shelf is available, you can put the switch on the rack shelf, slide the switch to an appropriate
location, and attach the switch to the rack with the mounting brackets.
Attaching the mounting brackets, chassis rails, and grounding
cable to the chassis
Each of the HP 5920 and 5900 switches has one front mounting position (near the network ports) and
one rear mounting position (near the power supplies).
Each of the HP 5920AF-24XG and 5920AF-24XG TAA switches has one primary grounding point (with
a grounding sign) and one auxiliary grounding point, and each of the HP 5900AF-48XG-4QSFP+,
5900AF-48XG-4QSFP+ TAA, 5900CP-48XG-4QSFP+, 5900CP-48XG-4QSFP+8Gb FC B-F,
5900AF-48XGT-4QSFP+, and 5900AF-48G-4XG-2QSFP+ switches has one primary grounding point
(with a grounding sign) and two auxiliary grounding points. Use the primary grounding point whenever
possible. If the primary grounding point fails or is not suitable for the installation site, use one of the
auxiliary grounding points.
Figure 5 Mounting and grounding positions of the HP 5920AF-24XG/5920AF-24XG TAA

8
(1) Rear mounting position (2) Primary grounding point
(3) Auxiliary
g
roundin
g
point 1 (4) Front mountin
g
position
Figure 6 Mounting and grounding positions of the HP 5900AF-48XG-4QSFP+/5900AF-48XG-4QSFP+
TAA/5900CP-48XG-4QSFP+/5900CP-48XG-4QSFP+8Gb FC B-F/5900AF-48XGT-4QSFP+
(1)
A
uxiliary
g
roundin
g
point 2 (2) Rear mountin
g
position
(3) Primary grounding point (4) Auxiliary grounding point 1
(5) Front mountin
g
position
Figure 7 Mounting and grounding positions of the HP 5900AF-48G-4XG-2QSFP+
1 2 3 4 5

9
(1) Auxiliary grounding point 2 (2) Rear mounting position
(3) Primary
g
roundin
g
point (4)
A
uxiliary
g
roundin
g
point 1
(5) Front mountin
g
position
Attaching the mounting brackets and chassis rails to the chassis
1. Align the mounting brackets with the screw holes in the rear mounting position or front mounting
position. See Figure 8 and Figure 9.
2. Use M4 screws (supplied with the switch) to attach the mounting brackets to the chassis.
3. Align the chassis rails with the rail mounting holes in the chassis:
{If the mounting brackets are in the rear mounting position, align the chassis rails with the screw
holes at the front of the side panels. See Figure 8.
{If the mounting brackets are in the front mounting position, align the chassis rails with the screw
holes at the rear of the side panels. See Figure 9.
4. Use M4 screws (supplied with the switch) to attach the chassis rails to the chassis.
NOTE:
Secure the mounting brackets and chassis rails to both sides of the chassis in the same way.
Connecting the grounding cable to the chassis
CAUTION:
The primary grounding point and auxiliary grounding point 1 are located on the left side panel. If you use
one of these grounding points, you must connect the grounding cable to the grounding point before you
mount the switch in the rack.
NOTE:
•HP recommends that you use the primary grounding point or auxiliary grounding point 1 because the
grounding cable and grounding screw that come with the switch are suitable only for these two
grounding points.
•To use auxiliary grounding point 2 on the HP 5900AF-48XG-4QSFP+, 5900AF-48XG-4QSFP+ TAA,
5900CP-48XG-4QSFP+, 5900CP-48XG-4QSFP+8Gb FC B-F, 5900AF-48XGT-4QSFP+, and
5900AF-48G-4XG-2QSFP+ switches, you must prepare a grounding cable yourself.
To connect the grounding cable to a chassis grounding point, for example, the primary grounding point:
1234 5

10
1. Choose a grounding point.
2. Unpack the grounding cable and grounding screws.
You can use the cable and screws shipped with the switch only for connecting to the primary
grounding point or auxiliary grounding point 1.
3. Align the two-hole grounding lug at one end of the cable with the grounding holes of the
grounding point, insert the grounding screws into the holes, and tighten the screws with a
screwdriver to attach the grounding lug to the chassis, as shown in Figure 8.
Figure 8 Attaching the rear mounting brackets/chassis rails/grounding cable to the chassis
Figure 9 Attaching the front mounting brackets/chassis rails to the chassis
Attaching the slide rails to the rack

11
1. Identify the rack attachment position for the slide rails.
2. Install cage nuts (user-supplied) in the mounting holes in the rack posts.
3. Align the screw holes in one slide rail with the cage nuts in the rack post on one side, and use
screws (user supplied) to attach the slide rail to the rack, as shown in Figure 10.
4. Repeat the preceding step to attach the other slide rail to the rack post on the other side.
Keep the two slide rails at the same height so the slide rails can attach into the chassis rails.
Figure 10 Installing the slide rails
Mounting the switch in the rack
This task requires two people. To mount the switch in the rack:
1. Wear an ESD wrist strap and make sure it makes good skin contact and is well grounded.
2. Verify that the mounting brackets and chassis rails have been securely attached to the switch
chassis.
3. Verify that the slide rails have been correctly attached to the rear rack posts.
4. Install cage nuts (user-supplied) to the front rack posts and make sure they are at the same level as
the slide rails.
5. Supporting the bottom of the switch, align the chassis rails with the slide rails on the rack posts, as
shown in Figure 11. Work with another person to slide the chassis rails along the slide rails until
the mounting brackets are flush with the rack posts.
6. Use screws (user-supplied) to attach the mounting brackets to the rack, as shown in Figure 12.
To secure the switch in the rack, make sure the front ends of the slide rails reach out of the chassis
rails.

12
Figure 11 Mounting the switch in the rack (1)
Figure 12 Mounting the switch in the rack (2)
Grounding the switch
W
ARNING!
Correctly connecting the switch grounding cable is crucial to lightning protection and EMI protection.

13
The power input end of the switch has a noise filter, whose central ground is directly connected to the
chassis to form the chassis ground (commonly known as PGND). You must securely connect this chassis
ground to the earth so the faradism and leakage electricity can be safely released to the earth to
minimize EMI susceptibility of the switch.
You can ground a switch by using a grounding strip at the installation site or the AC power cord
connected to the switch.
NOTE:
The power and grounding terminals in this section are for illustration only.
Grounding the switch with a grounding strip
W
ARNING!
Connect the
g
roundin
g
cable to the
g
roundin
g
system in the equipment room. Do not connect it to a fire
main or lightning rod.
If a grounding strip is available at the installation site, connect the grounding cable to the grounding
strip.
To connect the grounding cable:
1. Attach the two-hole grounding lug at one end of the grounding cable to a grounding point on the
switch chassis. See "Connecting the grounding cable to the chassis."
2. Remove the hex nut of a grounding post on the grounding strip.
3. Attach the ring terminal at the other end of the grounding cable to the grounding strip through the
grounding post, and fasten the ring terminal with the removed hex nut.
Figure 13 Connecting the grounding cable to a grounding strip
(1) Hex nut (2)
Rin
g
terminal
(3) Groundin
g
post
(4)
Groundin
g
strip

14
NOTE:
•HP recommends that you use the primary grounding point or auxiliary grounding point 1, because the
grounding cable and grounding screw provided with the switch are applicable only to these two
grounding points.
•To use auxiliary grounding point 2 on the HP 5900AF-48XG-4QSFP+, 5900AF-48XG-4QSFP+ TAA,
5900CP-48XG-4QSFP+, 5900CP-48XG-4QSFP+8Gb FC B-F, 5900AF-48XGT-4QSFP+, and
5900AF-48G-4XG-2QSFP+ switches, you must prepare a grounding cable yourself. The connection
method is the same as connecting to the other two grounding points.
Grounding the switch by using the AC power cord
If the installation site has no grounding strips, you can ground an AC-powered switch through the
protective earth (PE) wire of the power cord, but must make sure:
•The power cord has a PE terminal.
•The ground contact in the power outlet is securely connected to the ground in the power distribution
room or on the AC transformer side.
•The power cord is securely connected to the power outlet.
NOTE:
If the ground contact in the power outlet is not connected to the
g
round, report the problem and reconstruc
t
the grounding system.
Figure 14 Grounding through the PE wire of the AC power cord
(1) Three-wire AC power cable (2) Chassis
rear panel
12

15
NOTE:
To guarantee the grounding effect, use the grounding cable provided with the switch to connect to the
grounding strip in the equipment room as long as possible.
Installing/removing a fan tray
CAUTION:
Every HP 5920 and 5900 switch requires two same direction air flow fan trays to function correctly.
•Do not operate the system with one failed fan tray for more than 24 hours.
•Do not remove the failed fan tray until you are ready for replacing it.
•Do not operate the system without any fan tray for more than 2 minutes.
•Do not operate the system outside of the temperature range 0°C to 45°C (32°F to 113°F) degrees.
Failure to comply with these operating requirements might void the warranty.
Installing a fan tray
CAUTION:
To prevent damage to the fan tray or the connectors on the backplane, insert the fan tray gently. If you
encounter a hard resistance while inserting the fan tray, pull out the fan tray and insert it again.
Select appropriate fan trays as needed. For the optional fan trays and their specifications, see "Hot
swappable fan trays."
To install a fan tray:
1. Wear an ESD wrist strap and make sure it makes good skin contact and is well grounded.
2. Unpack the fan tray and verify that the fan tray model is correct.
3. Grasp the handle of the fan tray with one hand and support the fan tray bottom with the other, and
slide the fan tray along the guide rails into the slot until the fan tray seats in the slot and has a firm
contact with the backplane. See callout 1 in Figure 15 or Figure 16.
4. Fasten the captive screw on the fan tray with a Philips screwdriver until the fan tray is securely
attached in the chassis. See callout 2 in Figure 15 or Figure 16.
If the captive screw cannot be tightly fastened, verify the installation of the fan tray.

16
Figure 15 Installing an LSWM1FANSC/LSWM1FANSCB/LSWM1HFANSC/LSWM1HFANSCB fan tray
(to the HP 5900AF-48XG-4QSFP+)
Figure 16 Installing an LSVM1FANSC/LSVM1FANSCB fan tray to the HP 5920AF-24XG
Removing a fan tray
W
ARNING!
•Take out the fan tray after the fans completely stop rotating.
•To avoid an unbalanced fan causing loud noise, do not touch the fans, even if they are not rotating.
To remove a fan tray:
1. Wear an ESD wrist strap and make sure it makes good skin contact and is well grounded.
2. Loosen the captive screw of the fan tray with a Philips screwdriver until it is fully disengaged from
the switch chassis.
3. Grasp the handle of the fan tray with one hand and pull the fan tray part way out the slot. Support
the fan tray bottom with the other hand, and pull the fan tray slowly along the guide rails out of the
slot.
4. Put away the removed fan tray in an antistatic bag for future use.
1
2