W DOC AIRBUS | TSM A320F

Zone Cont Electrical Component with Short Circuit (Secondary Channel)

TASK 21-63-00-810-845-A
Zone Cont Electrical Component with Short Circuit (Secondary Channel)

1. Possible Causes
  • ZONE CONTROLLER [8HK]
  • TEMP SENSOR RH MIXER [25HK]
  • 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]
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 216303
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
3. Fault Confirmation
Subtask 21-63-00-710-131-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 21-63-00-810-136-B ** ON A/C NOT FOR ALL
A. If the ECAM lower DU gives the warning ZONE CONT or the test gives the maintenance message ZONE CONT OR SENSOR SUPPLY SHORT:
   (1) Additional Information.
     (a) For wiring and pin identification used in this procedure:
     (b) For disconnection/connection of electrical connectors refer to the applicable work step in para. 4. A. (2).
   (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 C and D (5 VDC from zone controller secondary channel).
     (a) If the voltage is between 4.8 VDC and 5.2 VDC replace the TEMP SENSOR RH MIXER [25HK] and connect the electrical connector (25HKA).
AMM 21-63-16-000-001 and,
AMM 21-63-16-400-001.
     (b) If the voltage is not between 4.8 VDC and 5.2 VDC:
  • disconnect the electrical connector (15HKA) from the TEMP SENSOR CKPT DUCT [15HK] .
  • make sure that the electrical connector is clean 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:
       2 If the voltage is not between 4.8 VDC and 5.2 VDC:
   (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 (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 and,
    * GND and pins C and D.
     (a) If there is no short circuit connect the electrical connector (15HKA).
     (b) If there is a short circuit repair the related wiring between:
* connector (15HKA) pin C and ZC connector (8HKAA) pin 9K,
* connector (15HKA) pin D and ZC connector (8HKAA) pin 9J.
  • connect the electrical connector (15HKA).
   (4) 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 and,
    * GND and pins C and D.
     (a) If there is no short circuit connect the electrical connector (16HKA).
     (b) If there is a short circuit repair the related wiring between:
* connector (16HKA) pin C and ZC connector (8HKAA) pin 9H,
* connector (16HKA) pin D and ZC connector (8HKAA) pin 9G.
  • connect the electrical connector (16HKA).
   (5) 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 and,
    * GND and pins C and D.
     (a) If there is no short circuit connect the electrical connector (17HKA).
     (b) If there is a short circuit repair the related wiring between:
* connector (17HKA) pin C and ZC connector (8HKAA) pin 10K,
* connector (17HKA) pin D and ZC connector (8HKAA) pin 10J.
  • connect the electrical connector (17HKA).
   (6) 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 D and E and,
    * GND and pins 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:
* connector (21HKA) pin D and ZC connector (8HKAA) pin 7K,
* connector (21HKA) pin E and ZC connector (8HKAA) pin 7J.
  • connect the electrical connector (21HKA).
   (7) 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 D and E and,
    * GND and pins 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:
* connector (22HKA) pin D and ZC connector (8HKAA) pin 7H,
* connector (22HKA) pin E and ZC connector (8HKAA) pin 7G.
  • connect the electrical connector (22HKA).
   (8) 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 D and E and,
    * GND and pins 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:
* connector (23HKA) pin D and ZC connector (8HKAA) pin 8K,
* connector (23HKA) pin E and ZC connector (8HKAA) pin 8J.
  • connect the electrical connector (23HKA).
   (9) 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 and,
    * GND and pins C and D.
     (a) If there is no short circuit connect the electrical connector (24HKA).
     (b) If there is a short circuit repair the related wiring between:
* connector (24HKA) pin C and ZC connector (8HKAA) pin 8H,
* connector (24HKA) pin D and ZC connector (8HKAA( pin 8G.
  • connect the electrical connector (24HKA).
   (10) 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 and,
    * GND and pins C and D.
     (a) If there is no short circuit connect the electrical connector (25HKA).
     (b) If there is a short circuit repair the related wiring between:
* connector (25HKA) pin C and ZC connector (8HKAA) pin 10H,
* connector (25HKA) pin D and ZC connector (8HKAA) pin 10G.
  • connect the electrical connector (25HKA).
  • 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 21-63-00-710-132-A ** ON A/C NOT FOR ALL
B. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 21-63-00-860-081-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:25:04 UTC
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