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Maintaining the PTX5000 Cooling System

Maintaining the PTX5000 Fan Trays

Purpose

For optimum cooling, verify the condition of the fan trays.

Action

On a regular basis:

  • Check the fan tray LEDs on the craft interface. During normal operation, the LEDs are lit green to indicate that the cooling system is functioning normally.

  • Place your hand near the exhaust vents at the rear of the chassis to determine whether the fans are pushing air out of the chassis.

    • Zone 0: The air exhausts from the left side of the SIBs.

    • Zone 1: The exhaust vent is located at the upper rear of the chassis.

    • Power system: The air exhausts from the power supply modules (PSMs).

  • Monitor the status of the fans. During normal operation, the fans in each fan tray are functioning at less than full speed.

    The fan trays each contain multiple fans that work in unison to cool the router’s components. If one fan fails, the host subsystem adjusts the speed of the remaining fans to maintain proper cooling. A red alarm is triggered when a fan fails, and a yellow alarm is triggered when a fan tray is removed.

    To display the status of the fans, issue the show chassis fan command.

Replacing a PTX5000 Horizontal Fan Tray

Removing a PTX5000 Horizontal Fan Tray

The upper horizontal fan tray is located below the craft interface, and the lower horizontal fan tray is located above the horizontal air filter. Each horizontal fan tray weighs about 16.3 lb (7.4 kg).

CAUTION:

After removing a fan tray, make sure to immediately insert the new fan tray. Do not remove both horizontal fan trays at the same time. Removing both front fan trays might cause the PTX5000 to shut down.

To remove a horizontal fan tray (see Figure 1 and Figure 2):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Loosen the captive screw on the left side of the fan tray faceplate, using a number 2 Phillips (+) screwdriver.
  3. Grasp the handle and pull the fan tray until it stops (approximately 1.5 inches out of the chassis).
    Warning:

    To avoid injury, keep tools and your fingers away from the fans as you slide the fan tray out of the chassis. The fans might still be spinning.

  4. When the fans stop spinning, press the release latch located on the left side of the fan tray.
  5. Grasp the handle and pull the fan tray completely out of the chassis.
Figure 1: Removing an Upper Horizontal Fan TrayInserting or removing a cartridge from an electronic device with an arrow indicating the direction of movement.
Figure 2: Removing a Lower Horizontal Fan TrayServer equipment with a module being inserted or removed, indicated by an arrow for direction.

Installing a PTX5000 Horizontal Fan Tray

To install a horizontal fan tray (see Figure 3 and Figure 4):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Grasp the fan tray by its handle and insert it straight into the chassis.
  3. Tighten the captive screw on the left side of the fan tray faceplate to secure it in the chassis, using a number 2 Phillips (+) screwdriver.
Figure 3: Installing an Upper Horizontal Fan TrayDiagram showing the removal or insertion of a component into an electronic device with an arrow indicating direction.
Figure 4: Installing a Lower Horizontal Fan TrayServer equipment with a module being inserted or removed, indicated by an arrow.

Replacing a PTX5000 Vertical Fan Tray

Removing a PTX5000 Vertical Fan Tray

The vertical fan tray is located in the front of the chassis. The vertical fan tray contains fourteen fans and weighs about 26.8 lb (12.2 kg).

CAUTION:

To maintain proper cooling, do not operate the PTX5000 with the fan trays removed for more than one minute.

To remove the vertical fan tray (see Figure 5):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Loosen the captive screws at the right of the fan tray faceplate, using a number 2 Phillips (+) screwdriver.
    Note:

    The two captive screws on the left are for the vertical air filter.

  3. Grasp the handle and pull the fan tray until it stops (approximately 1.5 inches).
  4. Place one hand under the fan tray to support it and pull the fan tray completely out of the chassis.
    Warning:

    To avoid injury, keep tools and your fingers away from the fans as you slide the fan tray out of the chassis. The fans might still be spinning.

Figure 5: Removing the Vertical Fan TrayTechnical illustration of a network equipment chassis with slots for line cards on the right and an opening front panel on the left.

Installing a PTX5000 Vertical Fan Tray

To install a replacement vertical fan tray (see Figure 6):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Grasp the fan tray handle and insert it straight into the chassis.
  3. Tighten the captive screw on the bottom of the fan tray faceplate to secure it in the chassis, using a number 2 Phillips (+) screwdriver.
Figure 6: Installing a Vertical Fan TrayTechnical illustration of a rack-mounted server chassis with open front panel revealing blade servers and network switches.

Maintaining the PTX5000 Air Filters

Purpose

For optimum cooling, verify the condition of the air filters.

Action

On a regular basis:

  • Check the air filters for dust and debris.

    As a general guideline, we recommended that you replace the filter elements every 6 months for routers operating in a typical environment. The filter elements degrade over time, and replacement intervals will vary by operating environment.

  • The shelf life of polyurethane filter varies from two years to five years depending on the storage conditions. Store in a cool, dry, and dark environment. Wrap the media in plastic and store in an environment with relative humidity between 40%- 80% and temperature between 40°F (4° C) to 90°F (32° C). Note that if the material flakes, or becomes brittle when rubbed or deformed, it is no longer usable.

CAUTION:

Always keep the air filters in place while the PTX5000 is operating. The fans are very powerful, and could pull small bits of wire or other materials into the PTX5000 through the unfiltered air intake. This could damage the router’s components.

Replacing a PTX5000 Horizontal Air Filter

Removing a PTX5000 Horizontal Air Filter

The horizontal air filter is located below the lower horizontal fan tray. The horizontal air filter weighs approximately 7.1 lb (3.2 kg).

To remove the horizontal air filter:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Loosen the two captive screws on the horizontal air filter tray.
  3. Grasp the head of the loosened screws, and pull to remove the air filter tray (see Figure 7).
  4. Locate the two areas, near each rear corner, where the air filter tray is exposed. Using these air filter tray frame access areas, slide the air filter toward the air filter tray faceplate, and pull up on the air filter to release the rear edge of the air filter from the air filter tray (see Figure 8).
  5. Remove air filter from the air filter tray.
  6. Discard the air filter.
Figure 7: Removing a Horizontal Air Filter TrayCisco ASR 9000 Series router illustration showing slots for line cards and modular components in a data center setting.
Figure 8: Removing a Horizontal Air FilterDiagram of HVAC air filter assembly with airflow arrows and mesh material for trapping particles.

Installing a PTX5000 Horizontal Air Filter

To install the horizontal air filter:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Locate markings on the side of the frame indicating airflow direction.
  3. Position the air filter over the air filter tray. Note the correct orientation for airflow direction. The airflow direction is through the perforated faceplate and up through the filter.
  4. Engage the edge nearest the perforated faceplate under the front flange, and slide the filter further toward the faceplate.

    Engage the opposite filter edge under the retainer bracket at the rear of the air filter tray and snap the air filter into place (see Figure 9).

  5. Reinstall the horizontal air filter tray into chassis (see Figure 10).
  6. Tighten captive screws to secure the air filter tray.
Figure 9: Inserting a Horizontal Fan Tray Air FilterSlanted HVAC filter rack with grid pattern, indicating filter placement and airflow direction.
Figure 10: Installing the Horizontal Air FilterTechnical illustration of a modular server rack with slots for server blades and a removable panel for maintenance.

Replacing a PTX5000 Vertical Air Filter

Removing a PTX5000 Vertical Air Filter

The vertical air filter is located with the vertical fan tray fan tray 0. The vertical air filter weighs approximately 7.6 lb (3.5 kg).

To remove the vertical air filter:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Loosen the two captive screws on the vertical air filter tray.
  3. Grasp the head of the loosened screws, and pull to remove the air filter tray (see Figure 11).
  4. Locate the two areas near each rear corner, where the air filter tray is exposed. Using these air filter tray frame access areas, slide the air filter toward the air filter tray faceplate, and pull up on the air filter to release the rear edge of the air filter from the air filter tray (see Figure 12).
  5. Remove the air filter from the air filter tray.
  6. Discard the air filter.
Figure 11: Removing a Vertical Air Filter TrayTechnical diagram of a server chassis with open front panel revealing internal slots for blades or modules. Arrow shows panel opening direction.
Figure 12: Removing a Vertical Air FilterRectangular air filter for HVAC systems with arrows showing airflow direction and grid pattern for capturing particles.

Installing a PTX5000 Vertical Air Filter

To install the vertical air filter:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Locate markings on the side of the frame indicating airflow direction.
  3. Position the air filter over the air filter tray. Note the correct orientation for airflow direction. The airflow direction is front to rear, through the perforated faceplate, and up through the filter.
  4. Engage the edge nearest the perforated faceplate under the front flange, and slide the filter further toward the faceplate (see Figure 13).

    Engage the opposite filter edge under the retainer bracket at the rear of the air filter tray and snap the air filter into place.

  5. Reinstall the vertical air filter tray into chassis (Figure 14).
  6. Tighten the captive screws to secure the air filter tray.
Figure 13: Inserting a Vertical Air FilterRectangular air filter with arrows indicating airflow direction; grid pattern represents particle-trapping material.
Figure 14: Installing a Vertical Air Filter TrayTechnical diagram showing the front panel of a server chassis open, revealing slots with server blades and airflow design.

Replacing a PTX5000 Power Supply Module Air Filter

Removing a PTX5000 Power Supply Module Air Filter

The PSM air filter is located inside the PSM door.

To remove the PSM air filter (see Figure 15):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Loosen the captive screws on the PSM door, and open the door.
  3. Inside the PSM door, locate the air filter retaining bracket at the top of the door. Using a number 2 Phillips (+) screwdriver, remove the 2 screws from the air filter retaining bracket, and remove the bracket.
  4. Remove the air filter.
  5. Discard the air filter.
Figure 15: Removing a PSM Door Air FilterTechnical illustration of replacing an air filter in a computer system, showing a panel opened with one filter being inserted.
  1
—

Air filter retaining bracket

  2
—

Air filter

Installing a PTX5000 Power Supply Module Air Filter

To install the PSM air filter (see Figure 16):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Locate markings on the side of the frame indicating airflow direction.
  3. Install the air filter into the door. Note that the correct orientation for airflow direction is through the perforated door and into the PSMs.
  4. Engage the edge nearest the perforated faceplate under the front flange, and slide the air filter further toward the faceplate.
  5. Reinstall the air filter retainer bracket and secure with two screws.
  6. Tighten the captive screws to secure the PSM door.
Figure 16: Installing a PSM Door Air FilterTechnical diagram of a server enclosure showing airflow system with labeled air filter and cooling fan.
  1
—

Air filter

  2
—

Air filter retaining bracket

Replacing a PTX Series PIC Air Filter

Removing a PTX Series PIC Air Filter

The 10-port 10-Gigabit Ethernet/40-Gigabit Ethernet/100-Gigabit Ethernet PIC with QSFP28 (P3-10-U-QSFP28) has air vents on the PIC faceplate, and has a field-replaceable air filter cover over the air vents.

To remove the PIC air filter (see Figure 17):


  2. Loosen the thumbscrews that secure the air filter cover to the PIC faceplate.
  3. Pull to remove the air filter cover and air filter.
  4. Remove the air filter from the air filter cover.
  5. Discard the air filter.
Figure 17: Removing a PIC Air FilterTechnical illustration of a network line card showing labeled faceplate with ports, dust cover, and module. Arrow indicates dust cover removal.
  1
—

Air filter cover

  3
—

Air vent

  2
—

Air filter

 

Installing a PTX Series PIC Air Filter

To install the PIC air filter (see Figure 18):


  2. Place the air filter in the air filter cover.
  3. Reinstall the air filter cover on to the PIC faceplate.
  4. Tighten the thumbscrews that secure the air filter cover to the PIC faceplate.
Figure 18: Installing a PIC Air FilterTechnical illustration of a line card with labeled parts: 1. locking mechanism, 2. airflow guide, 3. connection point. Designed for SFP28 transceivers.
  1
—

Air filter cover

  3
—

Air vent

  2
—

Air filter

 

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