Up to two -48 VDC Power Filter Unit (PFU) assemblies can be installed in the chassis. Using two PFUs, the recommended default, provides load-balancing and redundancy. The PFUs are located in the lower-rear of the chassis.
CAUTION: Although a single PFU can provide power for a fully loaded chassis, it is strongly recommended that two PFUs always remain installed for load-balancing and redundancy.
ESD During installation, maintenance, and/or removal, wear grounding wrist straps to avoid ESD damage to the components. Failure to do so could result in damage to electrical components and could potentially void your warranty.The chassis can use one of several mechanisms to indicate a PFU failure. The first indicator is when the POWER LED on the PFU is off. If the LED is off and a starPowerState SNMP trap is generated with a value of Failed (2), the PFU needs to be replaced.
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Verify that the power switch is in the ON position.
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Verify that the RTN and -VDC lugs are attached according to the instructions provided in this document.
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If a fuse panel is installed between the Power Distribution Frame (PDF) and the chassis, verify that the fuses are intact.
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If a fuse panel is installed between the PDF and the chassis, check the cables from the fuse panel to the chassis for continuity.
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Optional. If the circuit breaker on your PFU is equipped with a locking clip, move the clip to the right to unlock the circuit breaker’s actuator.
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Optional. If the circuit breaker on your PFU is equipped with a locking clip, lock the circuit breaker in place. Move the breaker’s locking clip to the right until the clip’s inside tang is recessed in the breaker’s actuator opening.
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WARNING: To avoid the risk of electric shock, verify that the power source is completely shut down before proceeding to the next step. Vor dem naechsten Schritt Spannungsversorgung abschalten, um einen elektrischen Schlag zu vermeiden.
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4
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Remove the cable from the -VDC terminals using the following instructions. The -VDC terminals are the two terminals located at the bottom of the PFU.
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Remove the nuts and washers that secure the cable to the PFU. The nuts on the 165A PFU require a 9/16-inch nut driver or socket wrench; those on the 125A PFU require a 7/16-inch nut driver or socket wrench.
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5
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Remove the cables from both RTN terminals using the following instructions. The RTN terminals are the two terminals located directly above the -VDC terminals.
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Remove the nuts and washers that secure the cable to the PFU. The nuts on the 165A PFU require a 9/16-inch nut driver or socket wrench; those on the 125A PFU require a 7/16-inch nut driver or socket wrench.
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7
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8
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Proceed to the Installing the Replacement PFU section that follows.
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CAUTION: 125A and 165A PFUs are not interchangeable. Both PFUs installed in chassis must be of the same type.Verify that the PFUs are correct for the chassis. The chassis part number label located in the rear center of the chassis just above the PFU slots identifies the proper PFUs to be used.
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3
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Each of the four power terminals is shipped with one nut and two washers. The 165A PFU has one lock-washer and one flat washer. The 125A PFU has two flat washers.
WARNING: To avoid electric shock, ensure that the power source is off before attaching power cables to the PFU(s) installed in the chassis.Spannungsversorgung abschalten vor Anschluss der Kabel an die Netzteile, um einen elektrischen Schlag zu vermeiden.
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5
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Ensure that the PFU in the bay labeled Power Filter Unit 1 is powered off.
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Optional. If the circuit breaker on your PFU is equipped with a locking clip, lock the circuit breaker in place. Move the breaker’s locking clip to the right until the clip’s inside tang is recessed in the breaker’s actuator opening.
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7
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Remove the nut and the lock-washer on the 165A PFU, or the nut and flat washer on the 125A PFU, from each of the four terminals. The nuts on the 165A PFU require a 9/16-inch nut driver or socket wrench; those on the 125A PFU require a 7/16-inch nut driver or socket wrench.
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Secure the lug to the RTN terminals using two of the four washers and two of the four nuts that were removed in step 3. The nuts on the 165A PFU should be torqued to 50 in-lb. (5.65 n-m); the nuts on the 125A PFU should be torqued to 50 in-lb. (5.65 n-m).
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Secure the lug to the -VDC terminals with the remaining two washers and nuts you removed in step 7. The nuts on the 165A PFU should be torqued to 50 in-lb. (5.65 n-m); the nuts on the 125A PFU should be torqued to 50 in-lb. (5.65 n-m).
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WARNING: To avoid the risk of fire, take proper precautions to ensure that the power feed and return lugs are not touching.Um einen Kurzschluss zu vermeiden, duerfen sich die beiden Stromkabel nicht beruehren.
CAUTION: To avoid the risk of electric shock and/or potential damage to the system, never operate the chassis without the plastic terminal cover. In addition, the power and return lugs must not protrude past the edge of the plastic terminal covers. Any portion of the lug that is exposed must be covered with shrink wrap.|
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Apply power to the PFUs using the information and instructions in the Applying Power to the Chassis section of the Applying Power and Verifying the Installation chapter of this guide.
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If the failed PFU is still under warranty, return it to the vendor for repair. Starent Network's contact information is located in the About This Guide chapter of this document.
If the failed PFU is out of warranty, contact the vendor to determine if it can be sent in for repair at an additional cost.
If you choose to discard the failed component, please return it to Starent Networks for proper disposal. Contact us at: recycle@starentnetworks.com to obtain return instructions. Starent Networks will pre-pay or reimburse shipping charges associated with this service.
