W DOC AIRBUS | TSM A320F

Galley and Lavatory Extraction Fault

TASK 21-23-00-810-801-A
Galley and Lavatory Extraction Fault

1. Possible Causes
  • GALLEY & TOILET FAN [1HU]
  • RELAY-FAN POWER [2HU]
  • RELAY-FAN CONTROL [3HU]
  • RELAY-FAN FAULT [4HU]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
ASM 212301
AMM 21-23-51-000-001
Removal of the Lavatory and Galley Extract Fan
AMM 21-23-51-400-001
Installation of the Lavatory and Galley Extract Fan
AMM 21-61-00-710-001
Operational Test of the Pack Temperature-Control System
ASM 216301
3. Fault Confirmation
Subtask 21-23-00-710-050-A
A. Do the operational test of the pack temperature-control system AMM 21-61-00-710-001.
4. Fault Isolation
Subtask 21-23-00-810-050-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message GALY & TOIL FAN OR SPLY:
   (1) If the fault continues:
  • do a check of the RELAY-FAN POWER [2HU] and replace it if necessary ASM 212301.
   (2) If the fault continues:
  • do a check of the RELAY-FAN CONTROL [3HU] and replace it if necessary ASM 212301.
   (3) If the fault continues:
  • do a check of the RELAY-FAN FAULT [4HU] and replace it if necessary ASM 212301.
   (4) If the fault continues:
  • do a check and repair the wiring between:
    FAN (1HU) connector A/A and CB (6HU),
    FAN (1HU) connector A/B and CB (6HU),
    FAN (1HU) connector A/C and CB (6HU),
    FAN (1HU) connector A/E and CB (5HU),
    FAN (1HU) connector A/D and GND,
    FAN (1HU) connector A/F and GND,
    RELAY (3HU) connector A/X1 and CB (5HU),
    RELAY (3HU) connector A/X2 and GND,
    RELAY (4HU) connector A/X and CB (6HU),
    RELAY (4HU) connector A/Z and GND,
    RELAY (4HU) connector A/1 and ZC (8HK) connector AB/1C,
    RELAY (4HU) connector A/A and GND ASM 212301 and ASM 216301.
Subtask 21-23-00-810-050-B ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message GALY & TOIL FAN OR SPLY(1HU):
   (1) If the fault continues:
  • do a check of the RELAY-FAN POWER [2HU] and replace it if necessary ASM 212301.
   (2) If the fault continues:
  • do a check of the RELAY-FAN CONTROL [3HU] and replace it if necessary ASM 212301.
   (3) If the fault continues:
  • do a check of the RELAY-FAN FAULT [4HU] and replace it if necessary ASM 212301.
   (4) If the fault continues:
  • do a check and repair the wiring ASM 212301 and ASM 216301 from:
  • the FAN (1HU) to the CB (6HU),
  • the FAN (1HU) to the CB (5HU),
  • the FAN (1HU) to ground,
  • the RELAY (3HU) to the CB (5HU),
  • the RELAY (3HU) to ground,
  • the RELAY (4HU) to the CB (6HU),
  • the RELAY (4HU) to ground and,
  • the RELAY (4HU) to the ACSC1 (47HH).
Subtask 21-23-00-710-051-A
B. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 21-23-00-860-050-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:24:36 UTC
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