W DOC AIRBUS | TSM A320F

OXYGEN/TMR RESET P/BSW FAULT Legend Fault

TASK 35-23-00-810-803-A
OXYGEN/TMR RESET P/BSW FAULT Legend Fault

1. Possible Causes
  • PUSBUTTON SW-OXYGEN/TMR RESET (13WR)
  • RELAY-SYS OFF (8WR)
  • RELAY-SYS OFF (9WR)
  • wiring
  • RELAY-TIME DELAY (15WR)
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 33-14-00-710-001
Operational Test of the Lights
AMM 35-23-00-710-001
Operational Check of Manual Mask Release
ASM 352301
3. Fault Confirmation
Subtask 35-23-00-710-054-A
A. Do the operational test of the manual mask release AMM 35-23-00-710-001.
4. Fault Isolation
Subtask 35-23-00-810-053-A
A. If the FAULT legend on the pushbutton switch OXYGEN/TMR RESET, which is installed on the panel 50VU, comes on after approx. 30 seconds:
  • Do a check of the PUSBUTTON SW-OXYGEN/TMR RESET (13WR) and replace it if necessary ASM 352301.
   (1) If the fault continues:
  • Do a check of the RELAY-SYS OFF (8WR) and replace it if necessary ASM 352301.
   (2) If the fault continues:
  • Do a check of the RELAY-SYS OFF (9WR) and replace it if necessary ASM 352301.
   (3) If the fault continues:
     (a) Do a check and repair the wiring if necessary between:
  • RELAY (6LP) connector A/17 and PB SW (13WR) connector A/7
  • RELAY (6LP) connector A/33 and CB (1WR)
  • RELAY (6LP) connector A/31 and GND
  • RELAY (11WR) connector A/X1 and CB (7WR)
  • RELAY (11WR) connector A/X2 and GND,
    ASM 352301.
   (4) If the fault continues:
     (a) If the test gives a different maintenance message:
  • Do the trouble shooting procedure related to the maintenance message.
Subtask 35-23-00-810-055-A
B. If the FAULT legend on the pushbutton switch OXYGEN/TMR RESET, which is installed on the panel 50VU, comes on and goes off after approx. 30 seconds:
  • Do a check of the RELAY-TIME DELAY (15WR) and replace it if necessary ASM 352301.
   (1) If the fault continues:
     (a) Do a check and repair the wiring if necessary between:
  • RELAY (6LP) connector A/17 and PB SW (13WR) connector A/7
  • RELAY (6LP) connector A/33 and CB (1WR)
  • RELAY (6LP) connector A/31 and GND
  • RELAY (15WR) connector A/X1 and CB (1WR)
  • RELAY (15WR) connector A/X2 and GND,
    ASM 352301.
   (2) If the fault continues:
     (a) If the test gives a different maintenance message:
  • Do the trouble shooting procedure related to the maintenance message.
Subtask 35-23-00-810-056-A
C. If the FAULT legend on the pushbutton switch OXYGEN/TMR RESET, which is installed on the panel 50VU, comes on and goes off after pushing the OXYGEN/MASK MAN ON pushbutton switch:
  • Do a check of the RELAY-TIME DELAY (15WR) and replace it if necessary ASM 352301.
   (1) If the fault continues:
     (a) Do a check and repair the wiring if necessary between:
  • RELAY (6LP) connector A/17 and PB SW (13WR) connector A/7
  • RELAY (6LP) connector A/33 and CB (1WR)
  • RELAY (6LP) connector A/31 and GND
  • RELAY (15WR) connector A/X1 and CB (1WR)
  • RELAY (15WR) connector A/X2 and GND,
    ASM 352301.
   (2) If the fault continues:
     (a) If the test gives a different maintenance message:
  • Do the trouble shooting procedure related to the maintenance message.
Subtask 35-23-00-710-055-A
D. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 35-23-00-860-052-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:33:38 UTC
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