** If there is a short to ground:
*** repair the related wiring.
** If there is no short to ground:
*** replace the C/B-AIR COND AVNCS VENT/MONG (3HQ).
. If there is 28VDC, make sure that the warning light of
the blower fan (20HQ) is off.
* If the warning light is on, push the RESET pushbutton switch on the blower fan (20HQ).
NOTE : The fan can operate immediately.
____ The warning light goes off.
** If the fault continues, replace the FAN-BLOWER, AVNCS VENT (20HQ).
* If the fault continues, do a check for 28VDC at pin AA/8A of the AEVC (10HQ).
** If there is 28VDC:
*** replace the AEVC (10HQ) (Ref. AMM TASK 21-26-34-000-001) and (Ref. AMM TASK 21-26-34-400-001).
** If there is no 28VDC:
*** do a check and repair the wiring between the AEVC
(10HQ), pin AA/8A and the blower fan control-contactor
(8HQ), pin Z and between the blower fan control-contactor
(8HQ), pin X and the blower fan (20HQ), pin A/D (Ref. ASM
21-26/03).
** If the fault continues:
*** replace the CNTOR-BLOWER FAN CTL, AVNCS VENT (8HQ).
**** If the fault continues:
***** replace the FAN-BLOWER, AVNCS VENT (20HQ) (Ref. AMM
TASK 21-26-51-000-001) and (Ref. AMM TASK 21-26-51-400-001).
b If the circuit breaker (3HQ) is open:
_ - close the circuit breaker.
. If the circuit breaker trips:
* do a check for a short to ground at the wiring between the blower fan (20HQ) pin A/E and the circuit breaker (3HQ) (Ref. ASM 21-26/03).
** If there is a short to ground: *** repair the related wiring.
** If there is no short to ground:
「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, 101-105, 301-399, ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 226
401-499, Aug 01/05 CES
*** replace the FAN-BLOWER, AVNCS VENT (20HQ) (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 (3HQ).
. If the circuit breaker stays closed and the fault
continues:
* replace the FAN-BLOWER, AVNCS VENT (20HQ) (Ref. AMM TASK 21-26-51-000-001) and (Ref. AMM TASK 21-26-51-400-001).
(7) If the circuit breaker (1HQ) 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 blower fan (20HQ), pins A/J, A/K, A/L and the blower fan control-contactor (8HQ), pins T1, T2, T3 (Ref. ASM 21-26/03).
1 If there is a short to ground:
_ - repair the related wiring.
2 If there is no short to ground:
_
- do a check for a short to ground at the wiring between the blower fan control-contactor (8HQ), pins L1, L2, L3, and the circuit breaker (1HQ) pins A2, B2, C2 (Ref. ASM 21-26/03).
a If there is a short to ground:
_ - repair the related wiring.
b If there is no short to ground:
_
- replace the FAN-BLOWER, AVNCS VENT (20HQ) (Ref. AMM TASK 21-26-51-000-001) and (Ref. AMM TASK 21-26-51-400-001).
c If the fault continues:
_
- replace the CNTOR-BLOWER FAN CTL, AVNCS VENT (8HQ).
(b) If the fault continues:
- replace the C/B-AVNCS BLOWER FAN (1HQ).
(8) If the fault continues:
- replace the PRESS SW-BLOWER FAN, AVNCS VENT (17HQ) (Ref. AMM TASK 21-26-11-000-001) and (Ref. AMM TASK 21-26-11-400-001).
(a) If the fault continues:
- replace the PRESS SW-BLOWER FAN, AVNCS VENT (19HQ) (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 : 001-049, 051-099, 101-105, 301-399, ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 227
401-499, Aug 01/05 CES 1 If the fault continues:
_
- replace the DEMISTER-AVNCS VENT FILTER (2081HM) and CARTRIDGE-AVNCS VENT FILTER (2082HM) and HOUSING-AVNCS VENT FILTER (2083HM)and (Ref. AMM TASK 21-26-43-600-007).
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本文链接地址：A320 Trouble Shooting Manual 排故手册 AIR CONDITIONING 空调1(68)
