** If there is no 28VDC:
*** do a check and repair the wiring between the AEVC
(10HQ), pin AA/9A and the extract fan control-contactor
(7HQ), pin Z and between the extract fan control-contactor
(7HQ), pin X and the extract fan (18HQ), pin A/D (Ref. ASM
21-26/02).
*** If the fault continues:
**** replace the CNTOR-EXTRACT FAN CTL, AVNCS VENT (7HQ).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 301-399, 401-499, ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 237
Aug 01/05 CES
***** If the fault continues:
****** replace the FAN-EXTRACT, AVNCS VENT (18HQ) (Ref. AMM
TASK 21-26-51-000-001) and (Ref. AMM TASK 21-26-51-400-001).
b If the circuit breaker (6HQ) is open:
_ - close the circuit breaker.
. If the circuit breaker trips:
* do a check for a short to ground at the wiring between the extract fan (18HQ), pin A/E and the circuit breaker (6HQ) (Ref. ASM 21-26/02).
** If there is a short to ground:
*** repair the related wiring.
** If there is no short to ground:
*** replace the FAN-EXTRACT, AVNCS VENT (18HQ) (Ref. AMM
TASK 21-26-51-000-001) and (Ref. AMM TASK 21-26-51-400-001).
*** If the fault continues:
**** replace the C/B-AIR COND AVNCS VENT/MONG (6HQ).
. If the circuit breaker stays closed and the fault
continues:
* replace the FAN-EXTRACT, AVNCS VENT (18HQ) (Ref. AMM TASK 21-26-51-000-001) and (Ref. AMM TASK 21-26-51-400-001).
(6) If the circuit breaker (2HQ) is open:
- close the circuit breaker.
(a) If the circuit breaker trips:
- do a check for a short to ground at the wiring between the extract fan (18HQ), pins A/J, A/K, A/L and the extract fan control-contactor (7HQ), pins L1, L2, L3 and the circuit breaker (2HQ) pins A2, B2, C2 (Ref. ASM 21-26/02).
1 If there is a short to ground:
_ - repair the related wiring.
2 If there is no short to ground:
_ - replace the CNTOR-EXTRACT FAN CTL, AVNCS VENT (7HQ).
(b) If the fault continues:
- replace the C/B-AVNCS EXTRACT FAN (2HQ).
(7) If the fault continues:
- replace the PRESS SW-EXTRACT FAN, AVNCS VENT (30HQ) (Ref. AMM TASK 21-26-11-000-001) AND (Ref. AMM TASK 21-26-11-400-001).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 301-399, 401-499, ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 238
Aug 01/05 CES
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299,
R Post SB 21-1087 For A/C 001-049,101-105,
B. Possible maintenance messages (one or more of these messages)
EXTRACT FAN 18HQ
PRESSURE SWITCH 30HQ
SKIN AIR OUTLET V 22HQ
ISOL V 24HQ
(1) If the test gives the maintenance message SKIN AIR OUTLET V 22HQ, replace the VALVE-SKIN AIR OUTLET, AVNCS VENT (22HQ) (Ref. AMM TASK 21-26-53-000-001) and (Ref. AMM TASK 21-26-53-400-001).
(2) If the test gives the maintenance message ISOL V 24HQ, replace the VALVE-SKIN EXCHANGER ISOLATION, AVNCS VENT (24HQ) (Ref. AMM TASK 21-26-55-000-001) and (Ref. AMM TASK 21-26-55-400-001).
(3) If the test gives the maintenance message EXTRACT FAN 18HQ:
- do a check of the status of the circuit breaker (2HQ).
(4) If the test also gives the maintenance message PRESSURE SW 30HQ:
- do the trouble shooting procedure (Ref. TASK 21-26-00-810-816).
(5) If the circuit breaker (2HQ) is closed:
- do a check for 115VAC at pins A/J, A/K, A/L of the extract fan (18HQ).
(a) If there is no 115VAC:
- do a check for 115VAC at pins T1, T2, T3 of the extract fan control-contactor (7HQ).
1 If there is no 115VAC:
_
- do a check for a short to ground at the wiring between the extract fan control-contactor (7HQ), pins L1, L2, L3 and the circuit breaker (2HQ), pins A2, B2, C2 (Ref. ASM 21-26/02).
a If there is a short to ground:
_ - repair the related wiring.
b If there is no short to ground:
_
- replace the C/B-AVNCS EXTRACT FAN (2HQ).
2 If there is 115VAC:
_
- do a check of the status of the circuit breaker (6HQ).
a If the circuit breaker (6HQ) is closed:
_
- do a check for 28VDC at pin A/E of the extract fan (18HQ).
. If there is no 28VDC:
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 239
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 AIR CONDITIONING 空調(diào)1(73)
