W DOC AIRBUS | TSM A320F

Failure of the Battery of EPSU 14WL

TASK 33-51-00-810-869-A
Failure of the Battery of EPSU 14WL

1. Possible Causes
  • battery of EPSU 14WL
  • EPSU [14WL]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 33-51-00-710-001
Operational Test of the Emergency Lights
AMM 33-51-00-710-003
Check of the Battery Capacity
AMM 33-51-38-000-001
Removal of the Emergency Power-Supply Unit (EPSU)
AMM 33-51-38-000-002
Removal of the Battery of the Emergency Power-Supply Unit
AMM 33-51-38-400-001
Installation of the Emergency Power-Supply Unit (EPSU)
AMM 33-51-38-400-002
Installation of the Battery of the Emergency Power-Supply Unit
3. Fault Confirmation
CAUTION: DO NOT USE THE TEACH-IN PROCEDURE AS AN ALTERNATIVE FOR TROUBLESHOOTING. A TEACH-IN PROCEDURE IS NOT A RESET PROCEDURE. BEFORE YOU DO A TEACH-IN PROCEDURE, MAKE SURE THAT YOU CORRECTED ALL FAILURES. IF YOU DO NOT OBEY THIS, FAILURES CAN CAUSE A MALFUNCTION OF THE CABIN EMERGENCY LIGHTING SYSTEM.
Subtask 33-51-00-710-183-A ** ON A/C NOT FOR ALL
A. Do the operational test Check Battery Capacity AMM 33-51-00-710-003.
4. Fault Isolation
Subtask 33-51-00-810-197-A ** ON A/C NOT FOR ALL
A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
Subtask 33-51-00-810-198-A ** ON A/C NOT FOR ALL
B. If the operational test gives the maintenance message:
   (1) BAT/EPSU(14WL)MID R:
Subtask 33-51-00-810-199-A ** ON A/C NOT FOR ALL
C. If the test gives the maintenance message:
   (1) BAT/EPSU(14WL)MID R:
     (a) If the fault continues:
Subtask 33-51-00-710-184-A ** ON A/C NOT FOR ALL
D. Do the test given in Para. 3.
5. Close-up
Subtask 33-51-00-860-124-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:32:12 UTC
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