W DOC AIRBUS | TSM A320F

Zone Cont Electrical Component with Short Circuit (Primary/Secondary Channels)

TASK 21-63-00-810-827-A
Zone Cont Electrical Component with Short Circuit (Primary/Secondary Channels)

1. Possible Causes
  • ZONE CONTROLLER [8HK]
  • TEMP SENSOR RH MIXER [25HK]
  • TRIM VALVE CKPT [11HK]
  • TRIM VALVE FWD CAB [12HK]
  • TRIM VALVE AFT CAB [13HK]
  • TEMP SENSOR CKPT DUCT [15HK]
  • TEMP SENSOR FWD CAB DUCT [16HK]
  • TEMP SENSOR AFT CAB DUCT [17HK]
  • SENSOR-TEMPERATURE, COCKPIT [21HK]
  • TEMP SENSOR FWD CAB [22HK]
  • TEMP SENSOR AFT CAB [23HK]
  • TEMP SENSOR LH MIXER [24HK]
  • CKPT TEMP SELECTOR [27HK]
  • FWD CAB TEMP SELECTOR [28HK]
  • AFT CAB TEMP SELECTOR [29HK]
  • 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 21-63-11-000-001
Removal of the Temperature Selector
AMM 21-63-11-400-001
Installation of the Temperature Selector
AMM 21-63-15-000-001
Removal of the Duct Temperature Sensors
AMM 21-63-15-400-001
Installation of the Duct Temperature Sensors
AMM 21-63-16-000-001
Removal of the Mixer Temperature Sensor
AMM 21-63-16-400-001
Installation of the Mixer Temperature Sensor
AMM 21-63-17-000-001
Removal of the Temperature Sensors
AMM 21-63-17-400-001
Installation of the Temperature Sensors
AMM 21-63-34-000-001
Removal of the Zone Controller
AMM 21-63-34-400-001
Installation of the Zone Controller
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 21-63-00-710-103-A ** ON A/C NOT FOR ALL
A. Do the operational test of the cockpit and cabin temperature-control system with CFDS/MCDU AMM 21-63-00-710-004.
NOTE: If a fault is detected, the ZC gives a fault code for shop maintenance in addition to the related CFDS message(s). For detailed information see the applicable Page Block 301.
4. Fault Isolation
Subtask 21-63-00-810-098-B ** ON A/C NOT FOR ALL
A. If the ECAM upper DU gives the warning COND ZONE REGUL FAULT, but no maintenance message comes on:
   (1) For wiring connections and pin identifications used in this procedure:
   (2) If the fault continues:
  • disconnect the electrical connector (25HKA) from the TEMP SENSOR RH MIXER [25HK] .
  • make sure that the electrical connector is clean and in the correct condition.
  • do a check for 5 VDC at the electrical connector (25HKA) between:
    pins E and F (5 VDC from zone controller primary channel) and between pins C and D (5 VDC from zone controller secondary channel).
     (a) If the voltage is not between 4.8 VDC and 5.2 VDC:
  • disconnect the electrical connector (11HKA).
  • make sure that the electrical connector is clear and in the correct condition.
  • do a check for 5 VDC again.
       1 If the voltage is between 4.8 VDC and 5.2 VDC replace the TRIM VALVE CKPT [11HK] and connect the electrical connector (11HKA).
AMM 21-63-51-000-001 and,
AMM 21-63-51-400-001.
       2 If the voltage is not between 4.8 VDC and 5.2 VDC connect the electrical connector (11HKA):
     (b) If the voltage is between 4.8 VDC and 5.2 VDC replace TEMP SENSOR RH MIXER [25HK] and connect the electrical connector (25HKA).
AMM 21-63-16-000-001 and,
AMM 21-63-16-400-001.
   (3) If the fault continues:
  • on the circuit breaker panel 122VU,
    open the CB's 1HK (V17), 2HK (V18), 3HK (V19) and 4HK (V20).
  • remove the ZONE CONTROLLER [8HK] .
    AMM 21-63-34-000-001.
  • disconnect the electrical connector (11HKA) from the TRIM VALVE CKPT [11HK] .
  • at the electrical connector (11HKA) do a check for a short circuit:
  • between pins U and J, U and K, U and L, J and K, J and L, K and L, C and D and,
  • between GND and pins U, J, K, L, and C.
     (a) If there is no short circuit connect the electrical connector (11HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the TRIM VALVE CKPT (11HK) to the ZC (8HK).
  • connect the electrical connector (11HKA).
   (4) If the fault continues:
  • disconnect the electrical connector (12HKA) from the TRIM VALVE FWD CAB [12HK] .
  • at the electrical connector (12HKA) do a check for a short circuit:
  • between pins U and J, U and K, U and L, J and K, J and L, K and L, C and D and,
  • between GND and pins U, J, K, L, and C.
     (a) If there is no short circuit connect the electrical connector (12HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the VALVE-TRIM AIR,FWD CABIN (12HK) to the ZC (8HK).
  • connect the electrical connector (12HKA).
   (5) If the fault continues:
  • disconnect the electrical connector (13HKA) from the TRIM VALVE AFT CAB [13HK] .
  • at the electrical connector (13HKA) do a check for a short circuit:
  • between pins U and J, U and K, U and L, J and K, J and L, K and L, C and D and,
  • between GND and pins U, J, K, L, and C.
     (a) If there is no short circuit connect the electrical connector (13HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the VALVE-TRIM AIR,AFT CABIN (13HK) to the ZC (8HK).
  • connect the electrical connector (12HKA).
   (6) If the fault continues:
  • disconnect the electrical connector (15HKA) from the TEMP SENSOR CKPT DUCT [15HK] .
  • at the electrical connector (15HKA) do a check for a short circuit between pins C and D, E and F and between GND and pins C, D, E and F.
     (a) If there is no short circuit connect the electrical connector (15HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SENSOR-DUCT TEMPERATURE,COCKPIT (15HK) to the ZC (8HK).
  • connect the electrical connector (15HKA).
   (7) If the fault continues:
  • disconnect the electrical connector (16HKA) from the TEMP SENSOR FWD CAB DUCT [16HK] .
  • at the electrical connector (16HKA) do a check for a short circuit between pins C and D, E and F and between GND and pins C, D, E and F.
     (a) If there is no short circuit connect the electrical connector (16HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SENSOR-DUCT TEMPERATURE,FWD CABIN (16HK) to the ZC (8HK).
  • connect the electrical connector (16HKA).
   (8) If the fault continues:
  • disconnect the electrical connector (17HKA) from the TEMP SENSOR AFT CAB DUCT [17HK] .
  • at the electrical connector (17HKA) do a check for a short circuit between pins C and D, E and F and between GND and pins C, D, E and F.
     (a) If there is no short circuit connect the electrical connector (17HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SENSOR-DUCT TEMPERATURE,AFT CABIN (17HK) to the ZC (8HK).
  • connect the electrical connector (17HKA).
   (9) If the fault continues:
  • disconnect the electrical connector (21HKA) from the SENSOR-TEMPERATURE, COCKPIT [21HK] .
  • at the electrical connector (21HKA) do a check for a short circuit between pins A and B, D and E and between GND and pins A, B, D and E.
     (a) If there is no short circuit connect the electrical connector (21HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SENSOR-TEMPERATURE,COCKPIT (21HK) to the ZC (8HK).
  • connect the electrical connector (21HKA).
   (10) If the fault continues:
  • disconnect the electrical connector (22HKA) from the TEMP SENSOR FWD CAB [22HK] .
  • at the electrical connector (22HKA) do a check for a short circuit between pins A and B, D and E and between GND and pins A, B, D and E.
     (a) If there is no short circuit connect the electrical connector (22HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SENSOR-TEMPERATURE, FWD CABIN (22HK) to the ZC (8HK).
  • connect the electrical connector (22HKA).
   (11) If the fault continues:
  • disconnect the electrical connector (23HKA) from the TEMP SENSOR AFT CAB [23HK] .
  • at the electrical connector (23HKA) do a check for a short circuit between pins A and B, D and E and between GND and pins A, B, D and E.
     (a) If there is no short circuit connect the electrical connector (23HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SENSOR-TEMPERATURE, AFT CABIN (23HK) to the ZC (8HK).
  • connect the electrical connector (23HKA).
   (12) If the fault continues:
  • disconnect the electrical connector (24HKA) from the TEMP SENSOR LH MIXER [24HK] .
  • at the electrical connector do a check for a short circuit between pins C and D, E and F and between GND and pins C, D, E and F.
     (a) If there is no short circuit connect the electrical connector (24HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SENSOR-MIXER UNIT TEMPERATURE COCKPIT (24HK) to the ZC (8HK).
  • connect the electrical connector (24HKA).
   (13) If the fault continues:
  • disconnect the electrical connector (25HKA) from the TEMP SENSOR RH MIXER [25HK] .
  • at the electrical connector (25HKA) do a check for a short circuit between pins C and D, E and F and between GND and pins C, D, E and F.
     (a) If there is no short circuit connect the electrical connector (25HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SENSOR-MIXER UNIT TEMPERATURE CABIN (25HK) to the ZC (8HK).
  • connect the electrical connector (25HKA).
   (14) If the fault continues:
  • disconnect the electrical connector (27HKA) from the CKPT TEMP SELECTOR [27HK] .
  • at the electrical connector (27HKA) do a check for a short circuit between pins 2 and 3, 2 and 4, 3 and 4 and between GND and pins 2, 3, and 4.
     (a) If there is no short circuit connect the electrical connector (27HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SEL-TEMPERATURE, AIR COND/COCKPIT (27HK) to the ZC (8HK).
  • connect the electrical connector (27HKA).
   (15) If the fault continues:
  • disconnect the electrical connector (28HKA) from the FWD CAB TEMP SELECTOR [28HK] .
  • at the electrical connector (28HKA) do a check for a short circuit between pins 2 and 3, 2 and 4, 3 and 4 and between GND and pins 2, 3 and 4.
     (a) If there is no short circuit connect the electrical connector (28HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SEL-TEMPERATURE, AIR COND/FWD CABIN (28HK) to the ZC (8HK).
  • connect the electrical connector (28HKA).
   (16) If the fault continues:
  • disconnect the electrical connector (29HKA) from the AFT CAB TEMP SELECTOR [29HK] .
  • at the electrical connector (29HKA) do a check for a short circuit between pins 2 and 3, 2 and 4, 3 and 4 and between GND and pins 2, 3 and 4.
     (a) If there is no short circuit connect the electrical connector (29HKA).
     (b) If there is a short circuit repair the related wiring between:
  • the SEL-TEMPERATURE, AIR COND/AFT CABIN (29HK) to the ZC (8HK).
  • connect the electrical connector (29HKA).
  • install the ZONE CONTROLLER [8HK] .
    AMM 21-63-34-000-001.
  • on the circuit breaker panel 122VU,
    close the CB's 1HK (V17), 2HK (V18), 3HK (V19) and 4HK (V20).
Subtask 21-63-00-710-104-A ** ON A/C NOT FOR ALL
B. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 21-63-00-860-076-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:25:03 UTC
"WTRUIB" 2025