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Fault detection and locating

553-2601-500A

Standard 2.0

December 1994

Table 2
Fault indicators and possible causes (Part 1 of 2)

Fault indication

Possible cause

CE/PE LED
Extinguished

—

Check QUX19 unit for tripped breaker.

—

Check for a blown fuse on the QUAA3 and QUX19 units.

—

Check connector PE1 on shelf backplane for a short or
defective wiring.

—

Check for a defective QPC705 (required if bottom PE shelf is
equipped with message waiting line card).

—

Check LN XFR switch on faceplate of QUAA3 unit and ensure
that it is set to 0. Wait 2 minutes for fault indication to clear.

—

Press –48 V CLR button on QUAA3 unit. If fault does not clear,
replace the following items until fault clears:

•

QPC705 (if equipped)

•

QPC659 in PE shelf in first tier

•

QUAA3 power unit

RECT/BATT LED
Extinguished

—

Check for tripped AC BRKR breaker on the –48 V rectifier.

—

Check for a blown fuse in the QBL15 battery unit (if provided).

—

Check for a tripped breaker on the QBL24 battery unit (if
provided). A tripped breaker on the QBL24 unit indicates
defective batteries or a defective QBL24 unit.

PE2-5 LED
Extinguished

—

Check for tripped PE2, PE3, PE4, or PE5 breaker on
QUX20 unit.

—

Check for extinguished LED on QPC706 or QPC659 circuit pack
on the PE shelves. Replace pack with extinguished LED.

FN LED Extinguished

—

Check FN fuse on QUX19 unit.

LED Extinguished on
QPC705 Power
Converter

—

Press the –48 V CLR button on the QUAA3 unit.

—

The QPC705 or the cable connecting it is defective. Replace the
following items until the fault is cleared.

•

Replace the QPC705

•

Replace the cable connecting the QPC705

Содержание QPC705

Страница 1: ...Year Publish FCC TM 1987 1994 All rights reserved Printed in the United States of America Information is subject to change without notice Northern Telecom reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC ru...

Страница 2: ...on 1 0 This appendix is reissued to remove references to rectifiers other than the QRF12 48 rectifier supplied with the cabinets Changes to the practice are indicated by a vertical bar in the margin next to the affected item December 1994 Standard release 2 0 Updated to new template and editoral changes added ...

Страница 3: ...Maintenance and equipment replacement Contents General 1 Fault detection and locating 3 Overlay programs 3 Alarm indications 3 Fault locating 3 Fault clearing procedures 3 Equipment replacement 11 Equipment replacement procedures 11 ...

Страница 4: ...nt replacement List of figures Figure 1 Battery cell connections 13 Figure 2 Expansion battery unit connections 16 Figure 3 Connections at rear of cabinet 18 Figure 4 Cabinet top assembly 23 Figure 5 Shelf assignments 29 Figure 6 Cooling unit connections 31 ...

Страница 5: ...ix QCA144 1 5 MB S RPE Cabinet Maintenance and equipment replacement List of tables Table 1 Alarm indications 4 Table 2 Fault indicators and possible causes 6 ...

Страница 6: ...al This appendix describes maintenance and equipment replacement procedures for the QCA144 Remote Peripheral Equipment RPE cabinet and related equipment Fault clearing for the RPE housed in the QCA144 cabinet is described in Remote Peripheral Equipment maintenance procedures 553 2601 500 ...

Страница 7: ...arm indications and causes that are unique to the QCA144 cabinet and are not necessarily caused by a fault in the RPE Fault locating Table 2 gives a cross reference of fault indicators and associated fault type Some faults may be cleared simply by using Table 1 Others are cleared by using the appropriate procedure for the type of fault indicated in Table 1 Fault clearing procedures The following p...

Страница 8: ... PE1 LED OFF PE 2 5 LED OFF RECT LED OFF FN LED OFF CE LN XFR ON CAB INP OFF REM ALARM ON ATT MJ ALARM ON TTY MSG PE1 LN XFR ON PE 2 5 LN XFR ON 5 V 12 V 10 V 6 V PE1 15 V 15 V PE1 12 V 10 V 6 V PE1 48 V PE1 52 V 47 V AL 52 V 42 V TRIP 86 V RMS DCON Rectifier Note Individual shelf transfer if 10 10 or 48 volts fail on shelf power converter Note Note Note ...

Страница 9: ... Manual line transfer 150 V Temp Fan Fuse QBL24 Table 1 Alarm indications Part 2 of 2 Type of fault Trouble indicator CE PE1 LED OFF PE 2 5 LED OFF RECT LED OFF FN LED OFF CE LN XFR ON CAB INP OFF REM ALARM ON ATT MJ ALARM ON TTY MSG PE1 LN XFR ON PE 2 5 LN XFR ON Note Individual shelf transfer if 10 10 or 48 volts fail on shelf power converter Note ...

Страница 10: ...ult clears QPC705 if equipped QPC659 in PE shelf in first tier QUAA3 power unit RECT BATT LED Extinguished Check for tripped AC BRKR breaker on the 48 V rectifier Check for a blown fuse in the QBL15 battery unit if provided Check for a tripped breaker on the QBL24 battery unit if provided A tripped breaker on the QBL24 unit indicates defective batteries or a defective QBL24 unit PE2 5 LED Extingui...

Страница 11: ...PC706 co n ver ter Power distr ibution ca b le going to shelf QUX20 unit DC ON LED Extinguished Che c k commercial ac p o wer suppl y Che c k DC BRKR on QBL24 battery box if equipped Che c k F1 and F2 fuses if equipped on 4 8 V rectifier If blown replace recti fi er LED Lit onPower Fail Trans f er Unit PFTU At the local sit e load pro g ram 35 and enter command CMAJ If fault does not clea r che c ...

Страница 12: ...ase of the cabinet Reset breaker If breaker trips replace power distribution cable at rear of cabinet If breaker does not trip proceed with next step 3 Set breakers to OFF Unseat all remaining circuit packs from PE shelf Set breaker to ON If breaker trips replace the shelf backplane 4 Set breaker to OFF Inset QPC659 pack Reset breaker ON If breaker trips replace defective QPC659 pack 5 Reinsert ci...

Страница 13: ...unit The QUX19 power unit The QUX20 power unit if equipped 2 Disconnect red and black wires from TB3 at rear of rectifier Reset breaker If breaker trips replace defective 48 V rectifier 3 Set breaker to OFF and reconnect wires 4 Disconnect red and black wires from TB1 at rear of QUX19 unit Reset breaker If breaker trips and no batteries are provided the fault is in the red and black wiring between...

Страница 14: ...nsert circuits one at a time until breaker trips Last circuit pack inserted is defective Replace Procedure 4 FN fuse operates or FN LED is extinguished Step Action Verification 1 Remove rear EMI shields if equipped and check connector J7 at rear of QUAA3 unit Connection should be secure 2 Ensure that FN fuses are not blown or defective If fuse blows when replaced replace fan units one at a time If...

Страница 15: ...ocedure 6 Main QBL24 Battery Unit replacement Procedure 7 QUAA3 Power Unit replacement Procedure 8 QUX19 Power Unit replacement Procedure 9 QUX20 Power Unit replacement Procedure 10 Power Distribution Cable replacement Procedure 11 QUA6 Power Fail Transfer Unit PFTU replacement Procedure 12 QPC705 Converter replacement Procedure 13 QPC706 Power Converter Circuit Pack replacement Procedure 14 QUD24...

Страница 16: ...sconnect the red and black wires from the and terminals to the battery unit Figure 1 5 With caution disconnect one at a time the black jumper wires interconnecting the battery packs Figure 1 6 Remove batteries from QBL24 battery unit 7 Place replacement batteries in QBL24 battery unit CAUTION Service in the cabinet is interrupted when replacing the batteries WARNING The battery cells are capable o...

Страница 17: ...ent Figure 1 Battery cell connections A A A A Battery packs Battery packs Front of QBL24 unit Top View of QBL24 Battery Unit Black interconnecting wires Black wire to QBL24 Unit Red wire to QBL24 Unit Flexible conduit for power and control wiring 553 1136 A A and connections on each battery pack A A ...

Страница 18: ...t the black wire inside the QBL24 battery unit to the remaining positive battery terminal and the red wire to the remaining negative battery terminal 10 Reinstall cover on QBL24 battery unit 11 Set the AC BRKR breaker located on the front 48 V rectifier to ON 12 Set the DC BRKR breaker on the front of the QBL24 battery units to ON 13 Set the CAB INP breaker on the front of the QUX19 or QUX21 unit ...

Страница 19: ...nstall cover on expansion QBL24 unit 8 Install flexible conduit and wiring from expansion QBL24 unit to main QBL24 unit Figure 2 9 Connect green wire to lug 2 black wire to terminal 1 of W1 and red wire to terminal 5 of TB1 on front panel of main QBL24 unit Figure 2 10 Install cover on main QBL24 unit 11 Set the AC BRKR breaker located on the front 48 V rectifier to ON in the cabinet connected to ...

Страница 20: ...A AAA DC BRKR SEN QBL24 BATT UN 54V 30A AAA AAA A A A A AAA AAA AAA AAAAAA AAAA AAA AAA A A A A AAA AAA AAAA AAAAAA AAAA AA AA AA AA QCAD295 Battery Cable Connects to cabinet Expansion QBL24 Battery Unit 1 2 1 2 3 4 5 1 2 3 4 8 7 6 5 W1 TB1 AA A Green wire Black wire Shield Inside View of Front Panel Main QBL24 Battery Unit QCAD301 Expansion Cable QCAD301 Cable from Expansion QBL24 Unit Remove plu...

Страница 21: ...QBL24 unit Figure 3 Remove wiring and flexible conduit from cabinet 6 Install flexible conduit and wiring from replacement QBL24 unit and to 48 V rectifier QUX19 unit and to GRD1 ground bus terminal as shown in Figure 3 7 Reinstall EMI shield if required 8 If an expansion QBL24 unit is equipped disconnect from old main QBL24 unit and connect to new main unit as described in Procedure 6 9 Remove ba...

Страница 22: ... unit long red and black Commercial power connections Terminal 3 DC ON connection Note Ground bar Terminal lug SDI Port Power cable in flexible conduit from battery unit Power cord to commercial power supply Place wiring in channel Black White Straps for batteryless operation only Green wire TB3 QRF12 Rectifier Note Line 1 Neutral 2 OUT 1 2 3 4 5 6 7 8 9 10 These terminals are located on the QUX21...

Страница 23: ...r of QUAA3 unit 5 Tag and disconnect wires from terminals 1 2 3 4 5 and 6 of TB4 at rear of QUAA3 unit 6 Perform this step only if a QPC705 converter is installed beside the QUAA3 unit From the front of the cabinet remove screws securing the QPC705 converter to the cabinet Slide the QPC705 out of the cabinet and set aside 7 From the front of the cabinet remove the two bolts securing the right bott...

Страница 24: ...r of QUAA3 unit reconnect wires to terminals 1 2 3 4 5 and 6 13 If previously removed reinstall EMI shield at rear of cabinet and secure with mounting screws 14 Ensure that the 24Hz 20Hz and the LN XFR switches on the front of the QUAA3 unit are correctly set usually set the same as on the removed QUAA3 unit 15 Set the AC BRKR breaker located on the front 48 V rectifier to ON 16 If cabinet is equi...

Страница 25: ... P5 P6 and P7 and wiring from terminals 1 2 3 4 5 and 6 of TB4 7 At the rear of the QUX19 unit tag and disconnect power wiring from TB1 and P10 wiring from TB2 8 From the ground bus at the right rear of the cabinet disconnect wiring from lugs GRD2A GRD2G and GRD1C 9 From the front of the cabinet remove the screws securing the QUX19 unit to cabinet and remove unit and attached wiring from cabinet 1...

Страница 26: ...and 4 The 14 AWG black wire to terminal 5 The 14 AWG black wire to terminal 6 17 At the cabinet ground bus connect the remaining wires from the QUX19 unit as follows Black and yellow wires to terminal GRD2A on one lug Blue wire to the second lug on terminal GRD2A One black wire on each lug of terminal GRD2G One white wire on each lug of terminal GRD1C 18 If previously removed reinstall EMI shields...

Страница 27: ...net top assembly A A A A A A A A AA AA AA AA AA AA AA AA Base Cabinet Front View of Cabinet 553 1141 AAAAAAAAA AAAAAAAAA Screws Louvered top assembly AA AA AA Optional Additional Shelf Optional Additional Shelf Cooling units AAAAAAAAA AAAAAAAAA Thermostat Two additional louvers to accomodate cooling units Top panel ...

Страница 28: ...and 5 may be spare of TB5 at rear of QUX20 unit 6 From the front of the cabinet remove the screws securing the QUX20 unit to the cabinet and remove unit 7 Position replacement QUX20 unit and secure to cabinet with mounting screws 8 From the rear of the cabinet connect the lead equipped with a spade connector to the terminal at TB3 at the rear of the QUX19 unit 9 Reconnect red and blue wires to ter...

Страница 29: ... this step only if the power cable serving the first tier is being replaced Disconnect connector P3 from the rear of the QUAA3 unit Disconnect red and blue wires from terminals 2 and 3 of TB5 at the rear of the QUX20 unit Disconnect the black and white wires from the distribution cable to the GRD2 and GRD1 connections on the ground bus at the rear of the cabinet Disconnect connectors PE2 and PE3 f...

Страница 30: ... the rear of the QUAA3 unit Connect the white and black wires equipped with ring connectors to GRD1 and GRD2 terminals on the ground bus Connect the red and blue wires to terminals 4 and 5 of TB5 at the rear of the QUX20 unit 5 Reinstall EMI shields and secure with mounting screws 6 Reconnect all cables previously disconnected 7 Set the CAB INP breaker on the QUX19 unit to ON Procedure 12 QUA6 Pow...

Страница 31: ...s Remove cable 5 If QPC705 is being replaced connect existing QCAD278 cable to connector on rear of new QPC705 converter If the QCAD278 cable is being replaced connect connector 705 of new cable to connector at rear of existing QPC705 converter 6 Install the QPC705 in its assigned position with the QCAD278 cable towards the rear of the cabinet Secure the QPC705 converter to the cabinet with mounti...

Страница 32: ...containing the QPC706 converter to DIS 3 Set the PE breaker corresponding to the PE shelf on the QUX20 unit to OFF Figure 5 4 Remove the QPC706 converter and install replacement 5 Set the corresponding PE breaker on the QUX20 unit to ON 6 Set the ENB DIS switch on the QPC659 circuit pack on the PE shelf to ENB 7 Using overlay program 32 enable loops previously disabled CAUTION The appropriate brea...

Страница 33: ... PE PWR X 1 X 2 X 3 X 4 DLB X 6 Y 1 X 7 Y 2 X 8 Y 3 X 9 Y 4 PE PWR Q P C 7 0 6 C O N V Q P C 7 0 6 C O N V B F R Shelf position 2 PE2 breaker on QUX20 unit Shelf position 3 PE3 breaker on QUX20 unit LPX LPY B F R LPX PE SHLF Y LP__SH_ X LP__SH_ PE SHLF Y LP__SH_ X LP__SH_ X 2 X 3 X 4 X 5 553 6107 DLB Rectifier X 6 Y 1 X 7 Y 2 X 8 Y 3 X 9 Y 4 X 10 Y 5 Q P C 7 0 5 C O N V X 1 Shelf position 1 CE PE1...

Страница 34: ...ctor of QUD24 unit Figure 6 3 Disconnect the cable or terminating plug whichever is equipped from connector P2 of the QUD24 unit Figure 6 4 Remove mounting screws securing QUD24 unit to cabinet top panel Figure 6 and remove QUD24 unit 5 Unpack and inspect the replacement QUD24 cooling unit 6 Install replacement QUD24 unit and secure to cabinet top panel with mounting screws Figure 6 7 Reconnect ca...

Страница 35: ...inet top panel AA AA AA AAA AAA AAA AAA AAA QUD24 Cooling Units AA AA CU1 connector at rear of cabinet QCAD303 Power Cable Note QCAD302 Power Cable Note Front of cabinet top panel QCAD304 Terminating Plug Note 553 1142 P2 P1 P1 P2 Front connectors Mounting screws A Hole in panel Note Cooling units are wired in series Connections to and between cooling units may not always be as shown Rear connecto...

Страница 36: ... 5 Remove the mounting screws at the front of the rectifier and remove the rectifier from cabinet 6 Position the new rectifier in the cabinet and secure with mounting screws 7 Set the ac breaker on the new rectifier to OFF 8 Reconnect all previously disconnected wiring Figure 3 9 Ensure that the 110V 220V switch on the front of the new rectifier is set to the correct voltage 10 Connect the rectifi...

Страница 37: ...plane being replaced is located in shelf positions 2 through 5 set the corresponding PE breaker PE2 PE3 PE4 or PE5 4 If the backplane being replaced is in positions 2 through 5 and the cabinet is equipped with EMI shields tag and disconnect cables from connectors A B C D E and F on the back of the shelf next to the backplane being replaced 5 If the cabinet is equipped with EMI shields remove the s...

Страница 38: ... removed on QUX19 unit or set PE breaker on QUX 20 unit for replaced backplane to ON 15 With overlay program 32 see 553 2301 511 enable the previously disabled shelves by entering command ENLS 1 s where 1 is the loop and s is the shelf number 16 Enter to abort overlay program 32 17 To test replacement PE shelf load overlay program 30 NWS 18 Enter command LOOP 1 where 1 is the loop number on which ...

Страница 39: ...formation is subject to change without notice Northern Telecom reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules SL 1 and Meridian 1 are trademarks of Northern Telecom Publication number 553 2601 500A ...

Страница 40: ...suant to Part 15 of the FCC rules and the radio interference regulations of Industry Canada These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful in...

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