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BTI7814 Field-Replaceable Units (FRUs)

 

Field-replaceable units are pre-installed when the BTI7814 is delivered. This section describes how to remove and replace the FRUs on the BTI7814.

Warning

Use proper caution when working with the equipment. This chapter might not cover every possible hazardous condition.

Safety Warnings

  • This equipment is intended to be installed and serviced by qualified personnel.

  • Be familiar with the safety guidelines described in the BTI7800 Series Hardware Overview and Installation Guide.

  • Ensure the chassis is installed properly and secured onto the rack.

  • Ensure you have an unobstructed path to the chassis.

  • Avoid contact with rotating fan blades.

Electrical Warnings

Caution

Electrostatic Discharge (ESD) can damage module components, causing complete or intermittent failures. ESD can occur when a module is improperly handled.

To prevent ESD damage to a module, follow these guidelines:

  • Always wear an ESD grounding device, such as an ESD wrist strap, when handling a module.

  • Do not remove a module from its antistatic bag until installation. Store removed modules in antistatic packaging.

  • If you need to set a module down, place it back into its antistatic packaging or on a properly-grounded antistatic mat.

  • Handle the module by its edges and/or its faceplate and avoid touching any pins, leads, or solder connections on the circuit board.

Replacing the BTI7814 DC PEM

Use this procedure to remove and replace the 14-Slot Chassis DC Power Entry Module (DC PEM) on the BTI7814 chassis.

The DC PEM that you are replacing must be disconnected from its power source. The other DC PEMs can remain powered.

Warning
  • Ensure that you are familiar with the safety and electrical warnings described in BTI7814 Field-Replaceable Units (FRUs).

  • Ensure that the plastic shields are in place over the other DC PEMs, and that there is no exposed wiring.

Tools Required

  • Number 2 Phillips screwdriver

  • 10 mm nut driver

  • Multimeter

  1. Disconnect the faulty PEM from its power source. Choose one of the following options:

    The faulty DC PEM might be connected to the external power source directly, or to another DC PEM from which it receives its power:

    • If you are removing the DC PEM that is connected to an external power source, follow the appropriate steps to disconnect the DC PEM from that source.

    • If the faulty DC PEM receives its power from another PEM, follow the appropriate steps to disconnect this other DC PEM from the power source.

  2. Label all cables to make them easier for you to reconnect later.
  3. Remove the plastic shield covering the studs.
  4. Remove the cables from the faulty DC PEM by removing the nuts, washers and double lugs from the studs.
  5. Remove the DC PEM from the chassis.
    1. Loosen the four thumbscrews (one on each corner of the DC PEM).

    2. Pull out the module. Be careful to keep the module straight along the slot guides to avoid damage to DC PEM components.

      Once the module is removed, place it in an antistatic bag or on a grounded antistatic mat.

  6. Install the replacement DC PEM.

    Carefully slide the module along the slot guides until the DC PEM connects to the backplane. Carefully tighten the thumbscrews.

  7. Connect the cabling to the replacement DC PEM, using the following setup for each stud:

    First add one nut to the stud. Add the double hole lug, the washers and the remaining nut.

  8. Orient and reinstall the plastic shield.

    The plastic shield has small holes to allow instrument access to the terminals while the shield is in place. Align the holes with the terminals when installing.

  9. Follow the appropriate procedures in your plant to reconnect power from the plant power source.

    The LEDs start to light up. The ACT LED turns solid green to acknowledge the module is powered on and installed successfully.

  10. Perform a voltage checklist. You can check the voltage through the instrument access holes in the plastic shields on the DC PEMs.

    With a portable multimeter, measure the voltage at each DC PEM as follows:

    • - Minus Feed: -42 VDC to -60 VDC as measured from the Feed to the Return.

    • + Positive Return: Within less than 2 V of the frame or chassis ground.

You have successfully completed this procedure.

Replacing the BTI7814 AC PEM

Use this procedure to remove and replace the AC Power Entry Module (AC PEM) on the BTI7814 chassis.

The AC PEM that you are replacing must be disconnected from its power source. The other AC PEMs can remain powered.

Warning

Ensure that you are familiar with the safety and electrical warnings described in BTI7814 Field-Replaceable Units (FRUs).

Note

If you plan on reusing the AC PEM that you are removing, you must wait for a minimum of 60 seconds before reinserting the removed PEM into another slot or chassis.

Tools Required

  • Number 2 Phillips screwdriver

  • Multimeter

  1. Identify the faulty PEM. The faulty PEM has the red or amber LED illuminated.
  2. Turn off power and unplug the AC cable to the faulty PEM. There is an ON/OFF switch on the AC PEM housing for each PEM.
  3. Remove the AC PEM housing cover to expose the AC PEM modules.
    1. Loosen the four thumbscrews on each corner of the AC PEM housing cover so that the screws spin freely. Ensure the thumbscrews are completely disengaged from their threaded holes. You might need a Phillips screwdriver for this step.

    2. Using the thumbscrews as handles, gently pull the cover away from the housing. You might need to alternately pull on one pair of thumbscrews, and then on the other pair.

    3. Set the cover down so that it does not get in your way.

  4. Remove the defective AC PEM module.
    1. Identify the faulty PEM again and ensure the switch for the PEM is OFF, and the AC cable is unplugged.

    2. Grasp the AC PEM latch and push it down to unseat the PEM module.

    3. Pull the module straight out until the connector on the PEM module is clear of the mating PEM connector on the backplane.

    4. Still grasping the latch, pivot the AC PEM module towards you and remove it from the housing.

    5. Place the module into an anti-static bag or on a ground mat.

    Note

    If you plan on reusing this AC PEM, you must wait for a minimum of 60 seconds before reinserting it into another slot or chassis.

  5. Install the replacement AC PEM.
    1. Pull open the latch on the replacement module.

    2. Ensure the module is right-side up, and insert it into the chassis. You can insert the module at an angle if necessary.

    3. Rotate the module until its exposed side is flush and parallel with the exposed sides of the other AC PEM modules.

      The connector on the PEM module is now inline with the mating PEM connector on the backplane.

    4. Carefully push the front of the module until the latch engages with the housing. The latch is engaged when it starts to move to the closed position by itself.

    5. Finish seating the module by closing the latch completely.

      Note

      If the latch is not engaged with the housing, the latch will close but the module will not seat.

  6. Reinstall the housing cover.
    1. Orient the cover by aligning the three slots in the cover with the three flanges on the housing.

    2. Gently push the cover onto the housing while keeping the flanges aligned.

      Note

      If the module is not seated properly, you will not be able to reinstall the housing cover.

    3. Make minor adjustments as necessary to align the four thumbscrews with the threaded holes.

    4. Tighten the four thumbscrews.

  7. Plug the AC cable back in and switch on the power to the PEM.

    The AC OK LED turns solid green to acknowledge the module is powered on and installed successfully.

You have successfully completed this procedure.

Replacing the Fuses on a BTI7814 AC PEM

Use this procedure to remove and replace a fuse on an AC Power Entry Module (AC PEM) on the BTI7814 chassis.

Changing a fuse on the AC PEM must be performed with the power off to some rectifiers. If the blown fuse is located in the top fuse array, then the rectifiers in Slot 1 and Slot 2 must be disconnected from their power source. If the blown fuse is located in the bottom fuse array, then the rectifiers in Slot 3 and Slot 4 must be disconnected from their power source. The slots are numbered 1 to 4 from top to bottom.

Warning

Ensure that you are familiar with the safety and electrical warnings described in BTI7814 Field-Replaceable Units (FRUs).

Note

The cause of the blown fuse must be understood and the problem rectified prior to changing the fuse.

Tools Required

  • Number 2 Phillips screwdriver

  1. Identify the slot for which the fuse has blown.
  2. Look at the fuse location diagram to determine the fuse array that contains the blown fuse.

    The fuses are divided into two fuse arrays. The top fuse array protects the DC output of the A feed, and is located behind the AC PEM in Slot 2. The bottom fuse array protects the DC output of the B feed, and is located behind the AC PEM in Slot 3.

  3. Turn off power and unplug the AC cables as follows:

    If the blown fuse is located in the top fuse array, turn off power and unplug the AC power cables from Slot 1 and Slot 2.

    If the blown fuse is located in the bottom fuse array, turn off power and unplug the AC power cables from Slot 3 and Slot 4.

  4. Follow the steps in Replacing the BTI7814 AC PEM and remove the AC PEM that is in front of the fuse array to which you need to gain access.
  5. Using needle-nose pliers, extract the fuse you want to replace and discard appropriately.
  6. Using needle-nose pliers, insert the replacement fuse (of the same rating) into the empty socket.
  7. Follow the steps in Replacing the BTI7814 AC PEM and reinstall the AC PEM and housing cover.
  8. Plug the AC cables back and switch on the power to all the PEMs.

    The AC OK LED turns solid green on all the PEMs.

You have successfully completed this procedure.

Replacing the BTI7814 CAP

This topic describes how to remove and replace the Chassis Alarm Panel (CAP) on the BTI7814 chassis.

The CAP is hot-swappable, and can be replaced while the system is powered on and operational.

Warning

Ensure that you are familiar with the safety and electrical warnings described in BTI7814 Field-Replaceable Units (FRUs).

The CAP is accessible from the rear of the chassis.

Tools Required

  • Number 2 Phillips screwdriver

  1. Remove all cable or other obstructions.
  2. Remove the rear chassis access cover that hides the CAP.
    1. Completely loosen the four thumbscrews that hold the cover in place.

      The thumbscrews should spin freely once they are disengaged from their threaded holes.

    2. Use the two thumbscrews on each side as handles and pull the cover outwards towards your body to disengage from the top edge.

    3. Lift the cover out from the bottom rail guide.

    4. Set the cover aside out of the way.

  3. Loosen the two thumbscrews on the CAP.
  4. Carefully grip the loosened thumbscrews and gently pull out the module.

    Place the module in an antistatic bag or on a grounded antistatic mat.

  5. Align the new CAP with the slot guides.
  6. Gently push the module until it connects to the backplane.
  7. Carefully tighten the thumbscrews.
  8. Replace the rear chassis access cover.
    1. Orient the cover and insert the bottom edge along the bottom rail guide.

    2. Gently push the top of the cover into place against the top edge.

    3. Make minor adjustments to align the thumbscrews with their threaded holes.

    4. Tighten the four thumbscrews that hold the cover in place.

You have successfully completed this procedure.

Replacing a BTI7814 FAN3

Use this procedure to replace a 14-Slot Chassis Front Cooling Module on the BTI7814 chassis.

The cooling modules are hot-swappable and can be replaced while the system is powered on and operational.

Warning

Ensure that you are familiar with the safety and electrical warnings described in BTI7814 Field-Replaceable Units (FRUs).

Tools Required

  • Number 2 Phillips screwdriver

  1. Open the cooling module door, located in the front of the chassis above the service module slots.

    Open the door by pushing on the side latches (one on each side of the door).

  2. Remove the faulty cooling module.
    1. Unseat the faulty cooling module. Wait until the blades have fully stopped before proceeding to the next step.

    2. Hold the cooling module handle and slowly slide the module out of the chassis.

  3. Place the cooling module in an antistatic bag or a grounded antistatic mat.
  4. Install the new cooling module.

    Before installing, ensure the correct handle is attached to the new module.

    The upper FAN3 modules have a different handle from the lower FAN3 modules. The lower modules are recessed deeper in the chassis and therefore require a deeper handle. The deeper handle has a circular cutout so that air flow is not obstructed to the FAN3 module directly above.

    Depending on whether you are replacing a lower or an upper FAN3 module, you might need to change the metal handle. The handle for the upper FAN3 module is attached with two screws. The handle for the lower FAN3 module is attached with four screws.

    Once the correct handle is attachd to the new module, insert the module into the slot until it is seated.

  5. Close the cooling module door.
    1. Gently push both sides of the door until the cooling module door is flush with the chassis.

    2. Pull on the side latches until they lock into place.

You have successfully completed this procedure.

Replacing a BTI7814 Booster Fan

Use this procedure to replace a BTI7814 Booster Fan (FAN9) on the BTI7814.

FAN9 modules are hot-swappable and can be replaced while the system is powered and operational.

Warning

Ensure that you are familiar with the safety and electrical warnings described in BTI7814 Field-Replaceable Units (FRUs).

Tools Required

  • Number 2 Phillips screwdriver.

  1. At the rear of the chassis, use the screwdriver to unfasten the four screws that secure the ventilation cover, and then pull the cover away from the chassis.
  2. Remove the faulty FAN9 module.
    1. Loosen the two thumbscrews that secure the module to the chassis, and grasp the module by its handle.

    2. Wait for the module's fans to stop.

    3. Carefully slide the module out of the chassis, and place it either in an antistatic bag or on a grounded antistatic mat.

  3. Install the replacement FAN9 module.
    1. Properly orient the module for installation, and carefully slide it into the chassis until it is fully seated.

    2. Secure the module by tightening the two thumbscrews.

      Caution

      If you are replacing both FAN9 modules in a chassis that is powered and operational, install only one replacement module at a time, ensuring that the first replacement module is fully secured before installing the second replacement module.

  4. Replace the ventilation cover.
    1. Place the ventilation cover on the chassis, and align it with the pilot holes of the four screws that will secure it.

    2. Loosely fasten the screws, and re-adjust the positioning of the cover if required.

    3. Fully fasten the screws.

You have successfully completed this procedure.

Performing a First Time Installation of the BTI7814 Booster Fans

Use this procedure to install BTI7814 Booster Fan (FAN9) modules in a BTI7814 in which FAN9 modules are not already installed.

FAN9 modules can be installed while the system is powered and operational.

Warning

Ensure that you are familiar with the safety and electrical warnings described in BTI7814 Field-Replaceable Units (FRUs).

Tools Required

  • Number 2 Phillips screwdriver.

  1. At the rear of the chassis, use the screwdriver to unfasten the four screws that secure the ventilation cover, and then pull the cover away from the chassis.
  2. Remove each of the four back flow dampers from the chassis by raising the damper and carefully pulling on it until it detaches.

  3. Do the following to install each FAN9 module:
    1. Properly orient the module for installation, and carefully slide it into the chassis until it is fully seated.

    2. Secure the module by tightening the two thumbscrews.

    Caution

    If you are installing the FAN9 modules in a chassis that is powered and operational, install only one module at a time, ensuring that the first module is fully secured before installing the second module.

  4. Replace the ventilation cover.
    1. Place the ventilation cover on the chassis, and align it with the pilot holes of the four screws that will secure it.

    2. Loosely fasten the screws, and re-adjust the positioning of the cover if required.

    3. Fully fasten the screws.

You have successfully completed this procedure.

Replacing a BTI7814 Air Filter

Use this procedure to replace an air filter on the BTI7814 chassis.

The air filter is hot-swappable and can be replaced while the system is powered on and operational.

The filter should be replaced every six months in a clean environment. If the dust level in your plant is high, replace the filter every three months. Usually the air filters in chassis installed lower in a rack require replacement more often than those installed higher in a rack.

Warning

Ensure that you are familiar with the safety and electrical warnings described in BTI7814 Field-Replaceable Units (FRUs).

Tools Required

  • Number 2 Phillips screwdriver

  1. Remove the front air intake grille by loosening the two thumbscrews. The grille is located immediately below the service modules and above the CMMs.
  2. The air filter bracket is mounted at an angle on the ceiling of the plenum. Using both hands, push down on the front air deflector.

    The air filter bracket will drop down once its front edge clears the front support lip.

  3. Carefully slide the air filter bracket out .
  4. Place the filter bracket upright on a working surface. The filter bracket should be standing along the long edge of the air deflector.
  5. Remove the dirty air filter from the bracket.
    1. Using both hands, grasp the air filter element to the right and to the left of the air filter element holding flange. Your thumbs should be on top of the filter element, and your fingers should be behind the filter element.

    2. Flex the filter element slightly by using your fingers to exert pressure from behind.

    3. Once the filter element has bent sufficiently to clear the holding flange, lift the filter element away from the bottom rail guide.

  6. Install the new air filter element into the bracket.
    1. Insert the new air filter element into the bottom rail guide.

    2. Using both hands, grasp the air filter element to the right and to the left of the air filter element holding flange. Your thumbs should be on top of the filter element, and your fingers should be behind the filter element.

    3. Bend the filter element slightly by using your fingers to exert pressure from behind.

    4. Once the filter element has bent sufficiently to clear the holding flange, push it in place behind the flange.

    5. Examine along all edges to make sure the filter element is in place.

  7. Slide the replacement air filter bracket along the top of the CMM. Do not lift the bracket. Let it rest on the air deflector as you slide it in.
  8. Using both hands, apply pressure to the top edge of the air filter bracket and gently push upwards. Once the front edge clears the front support lip, the bracket will snap into place.
  9. Reinstall the front air intake grille.

You have successfully completed this procedure.