W DOC AIRBUS | TSM A320F

Emergency Ram Air Inlet Fault

TASK 21-55-00-810-803-A
Emergency Ram Air Inlet Fault

1. Possible Causes
  • P/BSW-AIR COND/RAM RAM AIR [4HZ]
  • RELAY-RAM AIR OPENING CTL [5HZ]
  • RELAY-RAM AIR CLOSE CTL [3HZ]
  • EMERG RAM AIR ACTUATOR [7HZ]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 21-55-00-710-001
Operational Test of the Emergency Ram-Air Inlet
ASM 215501
AMM 21-55-51-000-001
Removal of the Emergency Ram Air Inlet Actuator
AMM 21-55-51-400-001
Installation of the Emergency Ram Air Inlet Actuator
AWM 315452
3. Fault Confirmation
Subtask 21-55-00-710-054-A
A. Do the operational test of the emergency ram air inlet AMM 21-55-00-710-001.
4. Fault Isolation
Subtask 21-55-00-810-053-A
A. If during the test the ram air symbol does not change from GREEN (CLOSED) to AMBER (OPEN) within the maximum operation time of 20 seconds:
  • replace the P/BSW-AIR COND/RAM RAM AIR [4HZ] .
   (1) If the fault continues:
  • replace the RELAY-RAM AIR OPENING CTL [5HZ] .
   (2) If the fault continues:
  • replace the RELAY-RAM AIR CLOSE CTL [3HZ] .
   (3) If the fault continues:
   (4) If the fault continues:
  • do a check and repair the wiring :
  • from the EMERG RAM AIR ACTUATOR A/B, F to the SDAC-1 (1WV1) AA/9F, 10F,
  • from the EMERG RAM AIR ACTUATOR A/B, F to the SDAC-2 (1WV2) AA/9F, 10F,
  • from the EMERG RAM AIR ACTUATOR A/D, H to the GND,
  • from the RAM AIR pushbutton switch (4HZ) A/J to the SDAC-1 (1VW1) AA/9G,
  • from the RAM AIR pushbutton switch (4HZ) A/J to the SDAC-2 (1WV2) AA/9G,
  • from the RAM AIR pushbutton switch (4HZ) A/D3 to the GND,
  • from the EMERG RAM AIR ACTUATOR to the circuit breaker (1HZ), via the relay (5HZ), the RAM AIR pushbutton switch (4HZ) and the relay (3HZ).
ASM 215501 and AWM 315452.
Subtask 21-55-00-710-055-A
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:24:49 UTC
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