W DOC AIRBUS | TSM A320F

Failure of EPSU 10WL to communicate with the CIDS

TASK 33-51-00-810-830-A
Failure of EPSU 10WL to communicate with the CIDS

1. Possible Causes
  • POWER-EMERGENCY SUPPLY [10WL]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 33-51-00-710-001
Operational Test of the Emergency Lights
ASM 335101
AMM 33-51-38-000-001
Removal of the Emergency Power-Supply Unit (EPSU)
AMM 33-51-38-400-001
Installation of the Emergency Power-Supply Unit (EPSU)
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 33-51-00-710-105-A ** ON A/C NOT FOR ALL
A. Do the operational test of the emergency lights with the MCDU AMM 33-51-00-710-001.
4. Fault Isolation
Subtask 33-51-00-810-113-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 33-51-00-810-114-A ** ON A/C NOT FOR ALL
B. If the operational test gives the maintenance message:
   (1) EPSU(10WL)FWD L/DEU B(300RH1):
     (a) If the fault continues:
  • do a check and repair the wiring between:
    EPSU 10WL pin -I and DEU-B 300RH1 pin B29.
    EPSU 10WL pin -P and DEU-B 300RH1 pin B31.
    EPSU 10WL pin X and DEU-B 300RH1 pin B30 ASM 335101.
     (b) If the fault continues:
  • do a check of the electrical connections of the escape slide ASM 335101.
Subtask 33-51-00-710-106-A ** ON A/C NOT FOR ALL
C. Do the test given in Para. 3.
5. Close-up
Subtask 33-51-00-860-086-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:32:09 UTC
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