Failure of the Connection between the Essential TR Current Output and the SDAC1 and SDAC2

TASK 24-34-00-810-802-A
Failure of the Connection between the Essential TR Current Output and the SDAC1 and SDAC2

1. Possible Causes

wiring
TR-ESS [1PE]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 243401
AMM 24-34-51-000-001	Removal of the Essential Transformer Rectifier
AMM 24-34-51-400-001	Installation of the Essential Transformer Rectifier
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 31-60-00-860-001	EIS Start Procedure
AMM 31-60-00-860-002	EIS Stop Procedure

3. Fault Confirmation
Subtask 24-34-00-860-052-A

A. Job Set-Up
(1) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
(2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.

Subtask 24-34-00-710-052-A

B. Test

ACTION	RESULT
On the ECAM control panel: push the ELEC key to get the ELEC page.	On the lower ECAM DU, ELEC page: amber crosses are shown instead of the value of the ESS TR current.

4. Fault Isolation
Subtask 24-34-00-810-051-A

A. If the test confirms the fault:

do a check of the wiring from the essential transformer rectifier pins B/B and B/C to the first terminal block ASM 243401.

(1) If there is no continuity:

repair the wiring.

(2) If there is continuity:

replace the TR-ESS [1PE] > AMM 24-34-51-000-001 and AMM 24-34-51-400-001.

Subtask 24-34-00-710-053-A

B. Do this test to make sure that the system operates correctly.

ACTION	RESULT
1.On the ECAM control panel: push the ELEC key to get the ELEC page.	On the lower ECAM DU: the ELEC page comes into view.
	In the ESS TR box: the value of the ESS TR current is shown in green.

5. Close-up
Subtask 24-34-00-860-053-A

A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure
AMM 31-60-00-860-002.
(2) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.

[Rev.8 from Aug 2018] 2026.04.04 04:26:46 UTC