W DOC AIRBUS | TSM A320F

Cockpit Temperature uncontrollable or too low with TAV AMBER XX

TASK 21-63-00-810-855-A
Cockpit Temperature uncontrollable or too low with TAV AMBER XX

1. Possible Causes
  • TRIM VALVE CKPT [11HK]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 21-63-00-710-004
Operational Test of the Cockpit and Cabin Temperature Control with CFDS/MCDU
ASM 216302
ASM 216303
AMM 21-63-51-000-001
Removal of the Trim Air Valve
AMM 21-63-51-400-001
Installation of the Trim Air Valve
3. Fault Confirmation
Subtask 21-63-00-710-145-A ** ON A/C NOT FOR ALL
A. Confirmation of the Fault
   (1) Do the operational test of the cockpit and cabin temperature-control system AMM 21-63-00-710-004.
4. Fault Isolation
Subtask 21-63-00-810-152-A ** ON A/C NOT FOR ALL
A. If on the ECAM COND page the CKPT trim air valve position indication shows amber XX and/or the Cockpit temperature is uncontrollable or too low (in flight):
   (1) If the fault continues:
     (a) This wiring check is only applicable for Trim Air Valves previous to P/N 1320A0000-01 or 963B0000-01 or 750B0000-01.
  • do a check and repair the wiring ASM 216302 from:
  • the TRIM VALVE CKPT (11HK) to the Zone Controller (8HK) and,
  • the TRIM VALVE CKPT (11HK) to ground.
     (b) This wiring check is only applicable for Trim Air Valves P/N 1320A0000-01 or 963B0000-01 or 750B0000-01 and subsequent.
  • do a check and repair the wiring ASM 216302 between:
  • TRIM VALVE CKPT (11HK) connector A/U and ZC (8HK) connector AB/13A,
  • TRIM VALVE CKPT (11HK) connector A/J and ZC (8HK) connector AB/12B,
  • TRIM VALVE CKPT (11HK) connector A/K and ZC (8HK) connector AB/13B,
  • TRIM VALVE CKPT (11HK) connector A/L and ZC (8HK) connector AB/14B,
  • TRIM VALVE CKPT (11HK) connector A/C and ZC (8HK) connector AB/7C,
  • TRIM VALVE CKPT (11HK) connector A/E and ZC (8HK) connector AB/7B,
  • the TRIM VALVE CKPT (11HK) to ground.
Subtask 21-63-00-810-152-B ** ON A/C NOT FOR ALL
A. If on the ECAM COND page the CKPT trim air valve position indication shows amber XX and/or the Cockpit temperature is uncontrollable or too low (in flight):
   (1) If the fault continues:
  • do a check and repair the wiring ASM 216303 from:
  • the TRIM AIR VALVE CKPT (11HK) to the ACSC1 (47HH) and,
  • the TRIM AIR VALVE CKPT (11HK) to ground.
Subtask 21-63-00-710-146-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:25:05 UTC
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