W DOC AIRBUS | TSM A320F

Zone Temperature Control Problems in all Zones

TASK 21-63-00-810-821-A
Zone Temperature Control Problems in all Zones

1. Possible Causes
  • TEMP SENSOR LH MIXER [24HK]
  • TEMP SENSOR RH MIXER [25HK]
  • RECIRC FILTER CARTRIDGE 1 [4012HM]
  • RECIRC FILTER CARTRIDGE 2 [4013HM]
  • TRIM AIR PRESS VALVE [14HK]
  • ZONE CONTROLLER [8HK]
  • CONT-AIR COND SYSTEM 1 [47HH]
  • CONT-AIR COND SYSTEM 2 [57HH]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 21-21-41-000-001
Removal of the Recirculation Filter
AMM 21-21-41-400-001
Installation of the Recirculation Filter
AMM 21-61-00-710-001
Operational Test of the Pack Temperature-Control System
AMM 21-61-34-000-002
Removal of the Air-Conditioning System Controller
AMM 21-61-34-400-002
Installation of the Air-Conditioning System Controller
AMM 21-63-00-710-004
Operational Test of the Cockpit and Cabin Temperature Control with CFDS/MCDU
ASM 216303
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 21-63-34-000-001
Removal of the Zone Controller
AMM 21-63-34-400-001
Installation of the Zone Controller
AMM 21-63-52-000-001
Removal of the Pressure Regulating Valve
AMM 21-63-52-400-001
Installation of the Pressure Regulating Valve
3. Fault Confirmation
Subtask 21-63-00-710-091-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.
Subtask 21-63-00-710-091-B ** 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.
4. Fault Isolation
Subtask 21-63-00-810-083-A
A. If the test gives a different maintenance message, do the related trouble shooting procedure.
Subtask 21-63-00-810-084-A ** ON A/C NOT FOR ALL
B. If the test confirms the fault, with the pushbutton switch HOT AIR, which is installed on the panel 30VU, set to on (with the FAULT and OFF legends off):
  • do a check that the resistance of the mixer-unit temperature cockpit-sensor (24HK) measured between connector A/E and A/F and connector A/C and A/D is in these limits ASM 216303:
Temp (Deg.C)
OHMS
+ 10
18820 +/- 5 %
+ 18
13340 +/- 5 %
+ 25
10000 +/- 5 %
+ 30
8197 +/- 5 %
+ 40
5598 +/- 5 %
+ 50
3903 +/- 5 %
   (1) If the resistance values are out of the specified limits:
   (2) If the fault continues:
  • do a check that the resistance of the mixer-unit temperature cabin-sensor (25HK) measured between connector A/E and A/F and connector A/C and A/D is in these limits ASM 216303:
Temp (Deg.C)
OHMS
+ 10
18820 +/- 5 %
+ 18
13340 +/- 5 %
+ 25
10000 +/- 5 %
+ 30
8197 +/- 5 %
+ 40
5598 +/- 5 %
+ 50
3903 +/- 5 %
     (a) If the resistance values are out of the specified limits:
   (3) If the fault continues:
     (a) If the filter is clogged:
   (4) If the fault continues:
     (a) If the filter is clogged:
   (5) If the fault continues:
   (6) If the fault continues:
Subtask 21-63-00-810-085-A ** ON A/C NOT FOR ALL
C. If the test confirms the fault, with the pushbutton switch HOT AIR, which is installed on the panel 30VU, set to on (with the FAULT and OFF legends off) or OFF:
   (1) If the test gives a different maintenance message, do the related trouble shooting procedure.
   (2) If the fault continues:
     (a) If the filter is clogged:
   (3) If the fault continues:
     (a) If the filter is clogged:
   (4) If the fault continues:
   (5) If the fault continues:
Subtask 21-63-00-810-084-B ** ON A/C NOT FOR ALL
D. If the test confirms the fault, with the pushbutton switch HOT AIR, which is installed on the panel 30VU, set to on (with the FAULT and OFF legends off):
  • do a check that the resistance of the mixer-unit temperature cockpit-sensor (24HK) measured between connector A/E and A/F and connector A/C and A/D is in these limits ASM 216303:
Temp (Deg.C)
OHMS
+ 10
18820 +/- 5 %
+ 18
13340 +/- 5 %
+ 25
10000 +/- 5 %
+ 30
8197 +/- 5 %
+ 40
5598 +/- 5 %
+ 50
3903 +/- 5 %
   (1) If the resistance values are out of the specified limits:
   (2) If the fault continues:
  • do a check that the resistance of the mixer-unit temperature cabin-sensor (25HK) measured between connector A/E and A/F and connector A/C and A/D is in these limits ASM 216303:
Temp (Deg.C)
OHMS
+ 10
18820 +/- 5 %
+ 18
13340 +/- 5 %
+ 25
10000 +/- 5 %
+ 30
8197 +/- 5 %
+ 40
5598 +/- 5 %
+ 50
3903 +/- 5 %
     (a) If the resistance values are out of the specified limits:
   (3) If the fault continues:
     (a) If the filter is clogged:
   (4) If the fault continues:
     (a) If the filter is clogged:
   (5) If the fault continues:
   (6) If the fault continues:
Subtask 21-63-00-810-085-B ** ON A/C NOT FOR ALL
E. If the test confirms the fault, with the pushbutton switch HOT AIR, which is installed on the panel 30VU, set to on (with the FAULT and OFF legends off) or OFF:
   (1) If the test gives a different maintenance message, do the related trouble shooting procedure.
   (2) If the fault continues:
     (a) If the filter is clogged:
   (3) If the fault continues:
     (a) If the filter is clogged:
   (4) If the fault continues:
   (5) If the fault continues:
   (6) If the fault continues:
Subtask 21-63-00-710-092-A
F. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 21-63-00-860-070-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:25:01 UTC
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