Maintaining MX10003 Cooling System Components
Maintaining the MX10003 Air Filter
Purpose
For optimum cooling, verify the condition of the air filter.
Action
Regularly inspect the air filter. A dirty air filter restricts airflow in the unit, producing a negative effect on the ventilation of the chassis. The filter degrades over time. You must replace the filter every 6 months.
Caution Always keep the air filter in place while the device is operating. Because the fans are very powerful, they could pull small bits of wire or other materials into the through the unfiltered air intake. This could damage the components.
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.
Replacing the MX10003 Air Filter Unit
The air filter unit consists of three parts–the outer filter cover, the air filter, and the inner cage which forms the body, and the air filter. The air filter sits right inside the outer filter cover and the inner cage. The air filter unit is installed into the cable management brackets, and are held tightly by captive screws.
Removing the MX10003 Air Filter Unit
Air filter assembly is designed to prevent dust from being drawn into the chassis. This filter assembly must be installed for the product to be NEBS GR 63 compliant.
To remove the air filter unit:
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Loosen the captive screws located on either side of the
air filter unit attached at the front of the router.
Note Removing the cables from the cable manager is not necessary to access the air filter.
- Grasp the air filter unit and gently pull the air filter
unit out of the cable management brackets. See Figure 1.
Figure 1: Removing the Air Filter from the Chassis 
Installing the MX10003 Air Filter Unit
The air filter unit is installed on the cable management brackets. Before installing the air filter unit, ensure that the cable management brackets are already installed on the front of the router.
To install the air filter unit:
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Ensure that the air filter unit is right side up.
- Grasp the air filter unit and slide into the rails on
the cable management brackets until it stops (see Figure 2). The air filter unit
fits snugly on the cable management brackets.
Figure 2: Installing the Air Filter 
- Tighten the captive screws to secure the air filter unit.
Replacing the MX10003 Air Filter
The air filter unit consists of three parts–the outer and inner metal cage unit which forms the body, and the air filter. The air filter sits right inside the outer and inner cage unit. The air filter unit is installed into the cable management brackets, and are held tightly by captive screws.
Regularly inspect the air filter. A dirty air filter restricts airflow in the unit, producing a negative effect on the ventilation of the chassis.
Removing the MX10003 Air Filter
Do not run the router for more than a few minutes without the air filter in place.
Always keep the air filter unit in place while the router is operating, except during replacement. Because the fans are very powerful, they could pull small bits of wire or other materials into the router through the unfiltered air intake. This could damage the router components.
To remove the air filter:
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Loosen the captive screws located on either side of the
air filter unit attached on the front of the router.
Note Removing the cables from the cable manager is not necessary to access the air filter.
Caution Do not run the router for more than 2 minutes without the air filter unit in place.
- Grasp the head of the loosened screws, and pull to remove
the outer air filter cover.
The air filter is located at the center of the air filter unit, and just behind the outer filter cover. See Figure 3.
- Grasp the air filter, and pull the air filter straight
out from the air filter unit.
Figure 3: Removing the Air Filter from the Air Filter Unit 
1—Outer filter cover3—Inner filter cage2—Air filter
Installing the MX10003 Air Filter
The air filter unit is installed on the cable management brackets. Before installing the air filter unit, ensure that the cable management brackets are already installed on the front of the router.
To install the air filter:
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Loosen the captive screws located on either side of the
air filter unit attached on the front of the router.
Note Removing the cables from the cable manager is not necessary to access the air filter.
Caution Do not run the router for more than 2 minutes without the air filter unit in place.
- Grasp the head of the loosened screws, and pull to remove
the outer air filter cover.
The air filter is located at the center of the air filter unit, and just behind the outer filter cover. See Figure 4.
- Grasp the air filter, and place the air filter straight
onto inner filter cage.
Figure 4: Installing the Air Filter into the Air Filter Unit 1—Outer filter cover3—Inner filter cage2—Air filter - Place the outer air filter cover back into it’s place, and tighten the captive screws to secure the air filter unit.
Maintaining the MX10003 Fan Module
Purpose
For optimum cooling, verify the condition of the fans.
Action
Monitor the status of the fans. A fan module contains multiple fans that work in unison to cool the router components. If one fan fails, the router adjusts the speed of the remaining fans to maintain proper cooling. A red alarm is triggered when a fan fails, and when a fan module is removed.
To display the status of the cooling system, issue the show chassis environment command. The output is similar to the following:
user@host> show chassis environmentClass Item Status Measurement Temp CB 0 Top Right Inlet Sensor OK 35 degrees C / 95 degrees F CB 0 Top Left Inlet Sensor OK 39 degrees C / 102 degrees F CB 0 Top Right Exhaust Sensor OK 46 degrees C / 114 degrees F CB 0 Top Left Exhaust Sensor OK 66 degrees C / 150 degrees F CB 0 CPU Core-0 Temp OK 50 degrees C / 122 degrees F CB 0 CPU Core-1 Temp OK 50 degrees C / 122 degrees F CB 0 CPU Core-2 Temp OK 49 degrees C / 120 degrees F CB 0 CPU Core-3 Temp OK 50 degrees C / 122 degrees F CB 0 CPU Core-4 Temp OK 49 degrees C / 120 degrees F CB 0 CPU Core-5 Temp OK 49 degrees C / 120 degrees F CB 0 CPU Core-6 Temp OK 49 degrees C / 120 degrees F CB 0 CPU Core-7 Temp OK 49 degrees C / 120 degrees F FPC 0 EA0_HMC0 Logic die OK 82 degrees C / 179 degrees F FPC 0 EA0_HMC0 DRAM botm OK 79 degrees C / 174 degrees F FPC 0 EA0_HMC1 Logic die OK 86 degrees C / 186 degrees F FPC 0 EA0_HMC1 DRAM botm OK 83 degrees C / 181 degrees F FPC 0 EA0 Chip OK 94 degrees C / 201 degrees F FPC 0 EA0-XR0 Chip OK 70 degrees C / 158 degrees F FPC 0 EA0-XR1 Chip OK 74 degrees C / 165 degrees F Power PEM 0 Check PEM 1 OK 49 degrees C / 120 degrees F Fans Fan Tray 0 Fan 0 OK Spinning at normal speed Fan Tray 0 Fan 1 OK Spinning at normal speed Fan Tray 1 Fan 0 OK Spinning at normal speed Fan Tray 1 Fan 1 OK Spinning at normal speed Fan Tray 2 Fan 0 OK Spinning at normal speed Fan Tray 2 Fan 1 OK Spinning at normal speed
Replacing an MX10003 Fan Module
Removing an MX10003 Fan Module
To prevent overheating, install the replacement fan module immediately after removing the existing fan module.
To remove the fan module (see Figure 5):
- Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
- Loosen the captive screw on the fan module faceplate (use a number-2 Phillips screwdriver).
- Hold and lift the latch located on the inside of the fan
module to release it from the chassis.
Warning To avoid injury, keep tools and your fingers away from the fans as you slide the fan module out of the chassis. The fans might still be spinning.
- Place one hand under the fan module to support it, and pull the fan module completely out of the chassis.
Installing an MX10003 Fan Module
To install the fan module (see Figure 6):
- Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
- Grasp the fan module by the handle, and place one hand under the fan module for support.
- Place the fan module on the respective slot, and carefully push the fan module into the chassis until the socket lock snaps into place and holds it.
- Using a number-2 Phillips screwdriver, turn the locking screw on the fan module faceplate until it is tight and secured.
