Failure of the TR1 or TR1 Contactor or Related Wiring

TASK 24-30-00-810-801-A
Failure of the TR1 or TR1 Contactor or Related Wiring

1. Possible Causes

CNTOR-TR 1 [5PU1]
wiring
TR-1 [1PU1]
C/B-TR1/SPLY [2PU1]
C/B-TR1/CNTOR/SPLY [4PU1]

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 243202
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
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 24-30-00-860-050-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 SYSTEM REPORT/TEST/ELEC page AMM 31-32-00-860-004.

Subtask 24-30-00-710-050-A

B. Test

NOTE: Before you do the test of the TR1, make sure that the AC BUS 1 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 TR1 FAULT message comes into view.
	On the lower ECAM DU, on the ELEC page: the line connection between the TR1 and the DC1 busbar is not shown, the DC BAT busbar energizes the DC1 busbar, the TR1 indication is shown in amber, the value is 0A and is shown in amber.
2.On the MCDU: push the line key adjacent to the TR1 indication,	The TR1 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 TR1 page: the NO FAULT indication comes into view, and On the lower ECAM DU, on the ELEC page: the TR1 supplies the DC1 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 TR1 page: the TR1 indication comes into view, and On the ELEC page: the line connection between the TR1 and the DC1 busbar is not shown, the DC BAT busbar energizes the DC1 busbar. Continue the trouble shooting (Refer to the fault isolation which follows).

4. Fault Isolation
Subtask 24-30-00-865-050-A

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
123VU	TR1/SPLY	2PU1	AB10
125VU	TR1/CNTOR/SPLY	4PU1	CF01

Subtask 24-30-00-810-050-A

B. If the test confirms the fault:

Do a check of the status of the circuit breakers 4PU1 and 2PU1.

(1) If the circuit breakers are closed:

Do a check of the TR1 voltage on the lower ECAM DU, on the ELEC page.

(a) If the TR1 voltage value is approximately 28VDC:

Replace the CNTOR-TR 1 [5PU1] AMM 24-32-55-000-001 and AMM 24-32-55-400-001.

1 If the fault continues:

Do a check and repair the wiring between the TR1 28VDC outlet and the TR1 pin B/F ASM 243202.

(b) If the TR1 voltage value is 0VDC and shown in amber:

Do a check of the wiring between the circuit breaker 2PU1 and the TR1.

1 If the wiring is correct:

Replace the TR-1 [1PU1] AMM 24-32-51-000-001 and AMM 24-32-51-400-001.

2 If the wiring is not correct:

Repair the wiring ASM 243202.

(2) If the circuit breaker 2PU1 is open:

Do the procedure (Ref. TSM TASK 24-00-00-810-803).

(a) If the fault continues:

Replace the C/B-TR1/SPLY [2PU1] .

(3) If the circuit breaker 4PU1 is open:

Do the procedure (Ref. TSM TASK 24-00-00-810-803).

(a) If the fault continues:

Replace the C/B-TR1/CNTOR/SPLY [4PU1] .

Subtask 24-30-00-710-051-A

C. Do this Test:

ACTION	RESULT
1.On the MCDU: push the line key adjacent to the TR1 indication,	The TR1 page comes into view.
push the line key adjacent to the TR1 RESET indication.	The NO FAULT indication comes into view.

5. Close-up
Subtask 24-30-00-860-051-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 04:39:05 UTC