W DOC AIRBUS | TSM A320F

Failure of the TR2 or TR2 Contactor or Related Wiring

TASK 24-30-00-810-802-A
Failure of the TR2 or TR2 Contactor or Related Wiring

1. Possible Causes
  • CNTOR-TR 2 [5PU2]
  • CNTOR-TR 2/AC SVCE BUS NORM SPLY [14PU]
  • TR-2 [1PU2]
  • wiring
  • RELAY-GND/FLT SELECT CTL [7XX]
  • CNTOR-AC & DC GND SVCE SPLY [14XX]
  • C/B-TR2/214XP/SPLY [2PU2]
  • C/B-TR2/CNTOR/SPLY [4PU2]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 24-00-00-810-803-A
Circuit Breaker Tripped and/or C/B TRIPPED Warning
ASM 243201
AMM 24-32-51-000-001
Removal of the Transformer Rectifier
AMM 24-32-51-400-001
Installation of the Transformer Rectifier
AMM 24-32-55-000-001
Removal of the TR 1 and TR 2 Contactors and the TR 2/AC Service Bus Normal Supply Contactor
AMM 24-32-55-400-001
Installation of the TR 1 and TR 2 Contactors and the TR 2/AC Service Bus Normal Supply Contactor
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002
De-energize the Aircraft Electrical Circuits Supplied from the External Power
ASM 244201
AMM 24-42-55-000-001
Removal of the Contactors
AMM 24-42-55-400-001
Installation of the Contactors
AMM 31-32-00-860-004
Procedure to Get Access to the SYSTEM REPORT/TEST/ELEC Page
AMM 31-60-00-860-001
EIS Start Procedure
AMM 31-60-00-860-002
EIS Stop Procedure
3. Fault Confirmation
Subtask 24-30-00-860-052-A
A. Job Set-up
   (1) Aircraft Maintenance Configuration
     (a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
     (b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
     (c) On the MCDU, get the ELEC menu on the SYSTEM REPORT/TEST page AMM 31-32-00-860-004.
Subtask 24-30-00-710-052-A
B. Test
NOTE: Before you do the test of the TR2, make sure that the AC BUS 2 supplies its primary winding, in any RESET mode.
ACTION
RESULT
1.On the ECAM control panel:
  • push the ELEC key.
On the upper ECAM DU:
  • the TR2 FAULT message comes into view.

On the lower ECAM DU, on the ELEC page:
  • the line connection between the TR2 and the DC2 busbar is not shown,
  • the DC BAT busbar energizes the DC2 busbar,
  • the TR2 indication is shown in amber, the value is 0 A and is shown in amber.
2.On the MCDU:
  • push the line key adjacent to the TR2 indication,
The TR2 page comes into view.
  • push the line key adjacent to the RESET indication.
NOTE: If the CFDS is not available, you can reset with the TR RESET pushbutton switch (15PU) which is on the relay box 103VU.
If on the TR2 page:
  • the NO FAULT indication comes into view, and
    On the lower ECAM DU, on the ELEC page:
  • the TR2 supplies the DC2 busbar.
    On the lower ECAM DU, on the ELEC page, if the TR ESS is in line:
  • push and release the ELEC/AC ESS FEED pushbutton switch.
    If the TR ESS is still in line:
  • Open and close the circuit breaker 1XC.

    Stop the trouble shooting.

    If on the TR2 page:
  • the TR2 indication comes into view.
    On the ELEC page:
  • the line connection between the TR2 and the DC2 busbar is not shown,
  • the DC2 busbar is not shown.

    Continue the trouble shooting (Refer to the fault isolation which follows).
4. Fault Isolation
Subtask 24-30-00-865-051-A
A. Table of the circuit breakers used in this procedure:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
123VUTR2/214XP/SPLY2PU2AB04
124VUTR2/CNTOR/SPLY4PU2BC01
Subtask 24-30-00-810-051-A ** ON A/C NOT FOR ALL
B. If the fault continues:
  • Do a check of the status of the circuit breakers 4PU2 and 2PU2.
   (1) If the circuit breakers are closed:
  • Do a check of the TR2 voltage on the lower ECAM DU, on the ELEC page.
     (a) If the TR2 voltage value is approximately 28VDC:
       1 If the fault continues:
       2 If the fault continues:
       3 If the fault continues:
  • Do a check and repair the wiring between ASM 243201:
    - Pin B/3 of the TR2 contactor (5PU2) and the pin B/11 of the contactor 14PU
    - Pin B/13 of the contactor 14PU and the circuit-breaker 4PU2.
       4 If the fault continues:
  • Do a check and repair the wiring between ASM 243201:
    - Pin B/F of the TR-2 (1PU2) and the pin A/41 of the diode module (2420VD)
    - Pin A/42 of the diode module (2420VD) and the B/5 of the TR2 contactor (5PU2).
         a If the fault continues:
  • Replace RELAY-GND/FLT SELECT CTL [7XX] .
         b If the fault continues:
         c If the fault continues:
  • Do a check and repair the wiring between ASM 243201:
    - Pin A2 of the TR2 supply circuit-breaker (2PU2) and the pin D of the contactor (14PU)
    - Pin B2 of the TR2 supply circuit-breaker (2PU2) and the pin E of the contactor (14PU)
    - Pin C2 of the TR2 supply circuit-breaker (2PU2) and the pin F of the contactor (14PU)
    - Pin M of the contactor (14PU) and the pin A/A of the TR-2 (1PU2)
    - Pin L of the contactor (14PU) and the pin A/A of the TR-2 (1PU2)
    - Pin K of the contactor (14PU) and the pin A/A of the TR-2 (1PU2).
     (b) If the TR2 voltage value is 0VDC and shown in amber:
  • Do a check for 115VAC on the pins M, L, K of the contactor (14PU) ASM 243201
       1 If there is 115VAC:
         a If the fault continues:
  • Do a check and repair the wiring between ASM 243201.
    - Pin AA of the TR2 (1PU2) and the pin M of the the contactor (14PU)
    - Pin AB of the TR2 (1PU2) and the pin L of the the contactor (14PU)
    - Pin AC of the TR2 (1PU2) and the pin K of the the contactor (14PU).
       2 If there is no 115VAC:
  • Do a check for 115VAC on the pins D, E, F of the contactor (14PU).
         a If there is 115VAC:
  • Replace RELAY-GND/FLT SELECT CTL [7XX] .

    * If the fault continues:
    * - Replace CNTOR-TR 2/AC SVCE BUS NORM SPLY [14PU] AMM 24-32-55-000-001 and AMM 24-32-55-400-001.

    * If the fault continues:
    * - Replace CNTOR-AC & DC GND SVCE SPLY [14XX] AMM 24-42-55-000-001 and AMM 24-42-55-400-001.

    * If the fault continues:
    * - Do a check and repair the wiring between ASM 244201:
    ** - Pin 3 of the contactor (14PU) and the ELEC/AC PWR/SVCE/CTL circuit breaker(3XX)
    ** - Pin 5 of the contactor (14PU) and the ground.
         b If there is no 115VAC:
  • Do a check and repair the wiring between the circuit breaker (2PU2) and the contactor (14PU) ASM 244201.
         c If the fault continues:
  • Do a check and repair the wiring between pin 5 of the TR2 contactor 5U2 and the circuit breaker 4PU2 ASM 243201.
   (2) If the circuit breaker 2PU2 is open:
     (a) If the fault continues:
  • Replace C/B-TR2/214XP/SPLY [2PU2] .
   (3) If the circuit breaker 4PU2 is open:
     (a) If the fault continues:
  • Replace C/B-TR2/CNTOR/SPLY [4PU2] .
Subtask 24-30-00-810-051-B ** ON A/C NOT FOR ALL
B. If the fault continues:
  • Do a check of the status of the circuit breakers 4PU2 and 2PU2.
   (1) If the circuit breakers are closed:
  • Do a check of the TR2 voltage on the lower ECAM DU, on the ELEC page.
     (a) If the TR2 voltage value is approximately 28VDC:
       1 If the fault continues:
       2 If the fault continues:
       3 If the fault continues:
  • Do a check and repair the wiring between the ASM 243201.
    - Pin B/3 of the TR2 contactor (5PU2) and the pin B/11 of the contactor 14PU
    - Pin B/13 of the contactor 14PU and the circuit-breaker 4PU2.
       4 If the fault continues:
  • Do a check and repair the wiring between the ASM 243201:
    - Pin B/F of the TR-2 (1PU2) and the pin A/41 of the diode module (2420VD)
    - Pin A/42 of the diode module (2420VD) and the B/5 of the TR2 contactor (5PU2).
         a If the fault continues:
  • Replace RELAY-GND/FLT SELECT CTL [7XX] .
         b If the fault continues:
         c If the fault continues:
  • Do a check and repair the wiring between the ASM 243201:
    - Pin A2 of the TR2 supply circuit-breaker (2PU2) and the pin 22 of the module AC-service-bus contactor (20XX)
    - Pin B2 of the TR2 supply circuit-breaker (2PU2) and the pin 23 of the module AC-service-bus contactor (20XX)
    - Pin C2 of the TR2 supply circuit-breaker (2PU2) and the pin 24 of the module AC-service-bus contactor (20XX)
    - Pin 16 of the module AC-service-bus contactor (20XX) and the pin A/A of the TR-2 (1PU2)
    - Pin 20 of the module AC-service-bus contactor (20XX) and the pin A/B of the TR-2 (1PU2)
    - Pin 18 of the module AC-service-bus contactor (20XX) and the pin A/C of the TR-2 (1PU2).
     (b) If the TR2 voltage value is 0VDC and shown in amber:
  • Do a check for 115VAC on the pins 16, 20, 18 of the module 20XX ASM 243201.
       1 If there is 115VAC:
         a If the fault continues:
  • Do a check and repair the wiring between ASM 243201:
    - Pin AA of the TR2 (1PU2) and the pin 16 of the module AC-service-bus contactor (20XX)
    - Pin AB of the TR2 (1PU2) and the pin 20 of the module AC-service-bus contactor (20XX)
    - Pin AC of the TR2 (1PU2) and the pin 18 of the module AC-service-bus contactor (20XX).
       2 If there is no 115VAC:
  • Do a check for 115VAC on the pins 22, 23, 24 of the module 20XX.
         a If there is 115VAC:
  • Replace RELAY-GND/FLT SELECT CTL [7XX] .

    * If the fault continues:
    * - Replace CNTOR-TR 2/AC SVCE BUS NORM SPLY [14PU] AMM 24-32-55-000-001 and AMM 24-32-55-400-001.

    * If the fault continues:
    * - Replace CNTOR-AC & DC GND SVCE SPLY [14XX] AMM 24-42-55-000-001 and AMM 24-42-55-400-001.

    * If the fault continues:
    * - Do a check and repair the wiring between ASM 244201:
    ** - Pin 3 of the contactor (14PU) and the ELEC/AC PWR/SVCE/CTL circuit breaker(3XX)
    ** - Pin 5 of the contactor (14PU) and the ground.
         b If there is no 115VAC:
  • Do a check and repair the wiring between the circuit breaker (2PU2) and the module 20XX ASM 244201.
         c If the fault continues:
  • Do a check and repair the wiring between pin 5 of the TR2 contactor 5PU2 and the circuit breaker 4PU2 ASM 243201.
   (2) If the circuit breaker 2PU2 is open:
     (a) If the fault continues:
  • Replace the C/B-TR2/214XP/SPLY [2PU2] .
   (3) If the circuit breaker 4PU2 is open:
     (a) If the fault continues:
  • Replace the C/B-TR2/CNTOR/SPLY [4PU2] .
Subtask 24-30-00-710-053-A
C. Do the Test:
ACTION
RESULT
1.On the MCDU:
  • push the line key adjacent to the TR2 indication,
The TR2 page comes into view.
  • push the line key adjacent to the TR2 RESET indication.
The NO FAULT indication comes into view.
5. Close-up
Subtask 24-30-00-860-053-A
A. Put the aircraft back to its initial configuration.
   (1) On the MCDU, push the line key adjacent to the RETURN indication until the CFDS menu page comes into view.
   (2) Do the EIS stop procedure AMM 31-60-00-860-002.
   (3) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:39:04 UTC
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