R **ON A/C 401-499,
C. If the test confirms the fault:
- do a check that the resistance of the compressor temperature sensor (32HH) measured between connector A/A and A/B is in these limits (Ref. ASM 21-61/02):
Temp (Deg.C) OHMS ---------------------------
+ 10 103.9 +/- 0.5
+ 20 107.8 +/- 0.5
+ 30 111.7 +/- 0.5
+ 50 119.4 +/- 0.5
+ 70 127.1 +/- 0.5
+ 100 138.5 +/- 0.5
(1) If the resistance values are out of the specified limits:
- replace the SENSOR-COMPRESSOR TEMPERATURE (32HH) (Ref. AMM TASK 21-61-11-000-001) and (Ref. AMM TASK 21-61-11-400-001).
(2) If the fault continues: Replace the SENSOR-PRESS, PACK 2 INLET (24HB1) (Ref. AMM TASK 21-51-11-000-001) and (Ref. AMM TASK 21-51-11-400-001).
(3) If the fault continues:
(a) Swap the SDACIs (1WV1 and 1WV2). (Ref.AMM Task 31-55-34-401)
(b) If this action has solved the problem:
- replace the SDAC which formerly was SDAC#1.
(4) If the fault continues:
(a) Open the CBIs for the ACSC1+2.
(b) Disconnect the ACSC1 and 2. (Ref.AMM Task 21-61-34-401)
(c) Disconnect the electrical connectors at the FCS#1(23HB) and FCS#2(24HB).
- (Ref.AMM Task 21-51-51-401).
(d) Disconnect the SDAC#1.
(e) Do a check for GND at the SDAC#1 connector AA pin 10D.
(f) Do a check for GND at the SDAC#1 connector AA pin 13B.
NOTE : there should be no GND contact
____
(g) If there is no GND contact, reconnect the SDAC#1.
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(h) If there is GND contact, do a check of the wiring and repair if
nessesary.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
D. If the test gives the maintenance message TEST OK, but the FAULT legend on the pushbutton switch AIR COND/PACK 2, which is installed on the panel 30VU, comes on:
- do the operational test of the annunciator light test system (Ref. AMM TASK 33-14-00-710-001).
(1) If the test gives a different maintenance message refer to the Fault Symptom List.
(2) If the fault continues:
- do a check of the PUSHBUTTON SWITCH-AIR COND/PACK 2 (6HB) and replace it if necessary (Ref. ASM 21-51/02).
(3) If the fault continues:
- do a check of the BOARD-ANN LT TEST & INTFC (20LP) and replace it if necessary (Ref. ASM 21-51/02).
(4) If the fault continues:
- replace the CONTROLLER-PACK 2 TEMP (27HH) (Ref. AMM TASK 21-61-34-000-001) and (Ref. AMM TASK 21-61-34-400-001).
(5) If the fault continues:
- do a check and repair the wiring between: RELAY (20LP) connector A/30 and SW (6HB) connector A/7, RELAY (20LP) connector A/41 and GND, RELAY (20LP) connector A/27 and PC 2 (27HH) connector AB/7A RELAY (20LP) connector A/27 and RELAY (14HB) connector B/A2, RELAY (20LP) connector A/29 and CB (2HB) (Ref. ASM 21-51/02).
R **ON A/C 401-499,
D. If the test gives the maintenance message TEST OK, but the FAULT legend on the pushbutton switch AIR COND/PACK 2, which is installed on the panel 30VU, comes on:
- do the operational test of the annunciator light test system (Ref. AMM TASK 33-14-00-710-001).
(1) If the test gives a different maintenance message refer to the Fault Symptom List.
(2) If the fault continues:
- do a check of the PUSHBUTTON SWITCH-AIR COND/PACK 2 (6HB) and replace it if necessary (Ref. ASM 21-51/02).
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R (3) If the fault continues:
R - do a check of the BOARD-ANN LT TEST & INTFC (20LP) and replace it
R if necessary (Ref. ASM 21-51/02).
R (4) If the fault continues:
R - replace the CONT-AIR COND SYSTEM 2 (57HH) (Ref. AMM TASK 21-61-34-
R 000-002) and (Ref. AMM TASK 21-61-34-400-002).
R (5) If the fault continues:
R - do a check and repair the wiring (Ref. ASM 2151S02) from:
R - the RELAY (20LP)A pin 30 to the SW (6HB)A pin 7,
R - the RELAY (20LP)A pin 41 to ground,
R - the RELAY (20LP)A pin 27 to the ACSC2 (57HH),
R - the RELAY (20LP)A pin 27 to the RELAY (14HB)B pin A2 and,
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本文链接地址：A320 Trouble Shooting Manual 排故手册 AIR CONDITIONING 空调2(26)
