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:

replace the ZONE CONTROLLER [8HK] .
AMM 21-63-34-000-001 and,
AMM 21-63-34-400-001.

(1) For wiring connections and pin identifications used in this procedure:

ASM 216302 and,
ASM 216303.

(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):

repeat para. 4.A.(2) (a) for:
connector (12HKA) and the TRIM VALVE FWD CAB [12HK] .
AMM 21-63-51-000-001 and,
AMM 21-63-51-400-001.
connector (13HKA) and the TRIM VALVE AFT CAB [13HK] .
AMM 21-63-51-000-001 and,
AMM 21-63-51-400-001.
connector (15HKA) and the TEMP SENSOR CKPT DUCT [15HK] .
AMM 21-63-15-000-001 and,
AMM 21-63-15-400-001.
connector (16HKA) and the TEMP SENSOR FWD CAB DUCT [16HK] .
AMM 21-63-15-000-001 and,
AMM 21-63-15-400-001.
connector (17HKA) and the TEMP SENSOR AFT CAB DUCT [17HK] .
AMM 21-63-15-000-001 and,
AMM 21-63-15-400-001.
connector (21HKA) and the SENSOR-TEMPERATURE, COCKPIT [21HK] .
AMM 21-63-17-000-001 and,
AMM 21-63-17-400-001.
connector (22HKA) and the TEMP SENSOR FWD CAB [22HK] .
AMM 21-63-17-000-001 and,
AMM 21-63-17-400-001.
connector (23HKA) and the TEMP SENSOR AFT CAB [23HK] .
AMM 21-63-17-000-001 and,
AMM 21-63-17-400-001.
connector (24HKA) and the TEMP SENSOR LH MIXER [24HK] .
AMM 21-63-16-000-001 and,
AMM 21-63-16-400-001.
connector (27HKA) and the CKPT TEMP SELECTOR [27HK] .
AMM 21-63-11-000-001 and,
AMM 21-63-11-400-001.
connector (28HKA) and the FWD CAB TEMP SELECTOR [28HK] .
AMM 21-63-11-000-001 and,
AMM 21-63-11-400-001.
connector (29HKA) and the AFT CAB TEMP SELECTOR [29HK] .
AMM 21-63-11-000-001 and,
AMM 21-63-11-400-001.

(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 04:38:54 UTC