W DOC AIRBUS | TSM A320F

Loss of the Input Discrete (ENG 1/ENG 2) (PHC 1)

TASK 30-31-00-810-835-A
Loss of the Input Discrete (ENG 1/ENG 2) (PHC 1)

1. Possible Causes
  • PHC-1 [6DA1]
  • RELAY-OIL LOW PRESS AND GROUND, ENG1 (12KS1)
  • RELAY-OIL LOW PRESS AND GROUND, ENG2 (12KS2)
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 30-31-00-710-001
Operational Test of the Probe Ice Protection
ASM 303101
AMM 30-31-34-000-002
Removal of the Probe Heat Computer (PHC)
AMM 30-31-34-400-002
Installation of the Probe Heat Computer (PHC)
3. Fault Confirmation
Subtask 30-31-00-710-118-A
A. Test
   (1) Do the operational test of the probe ice protection AMM 30-31-00-710-001.
4. Fault Isolation
Subtask 30-31-00-810-084-B
A. If the test gives the maintenance message CHECK EIU - PHC 1 INTERFACE:
  • do a check for ground at pin A/<F and/or pin A/<G of the PHC 1 (6DA1).
   (1) If there is ground:
   (2) If there is no ground:
  • replace the RELAY-OIL LOW PRESS AND GROUND, ENG1 (12KS1).
     (a) If the fault continues:
  • replace the RELAY-OIL LOW PRESS AND GROUND, ENG2 (12KS2).
     (b) If the fault continues:
       1 Do a check and repair the wiring :
  • from the PHC 1 (6DA1) pin A/<F to the relay (12KS1) pin A/4
  • from the relay (12KS1) pin A/B to ground
  • from the PHC 1 (6DA1) pin A/<G to the relay (12KS2) pin A/4 and
  • from the relay (12KS2) pin A/B to ground
ASM 303101.
Subtask 30-31-00-710-119-A
B. Do the operational test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:29:37 UTC
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