(2) If there is no GND:
- do a check and repair the wiring between: CONTROL UNIT 5DU connector A/15 and GND (Ref. ASM 30-71/01).
(3) If there is no 115 VAC:
- do a check and repair the wiring between: CONTROL UNIT 5DU connector A/14 and CB 1DU (Ref. ASM 30-71/01).
R **ON A/C 001-049, 051-099, 101-149, 201-299,
D. If the green 'UNIT' LED and the green 'HTR' LED of the CONTROL UNIT 5DU come on:
- do the BITE test of the potable-water ice-protection system (Ref. AMM TASK 30-73-00-740-001).
(1) If the green III/IV LED of the CONTROL UNIT 3DW does not come on:
- do a check of the related microfuses.
(a) If the microfuses are OK:
- replace the CONTROL UNIT (3DW) (Ref. AMM TASK 30-73-34-000-001) and (Ref. AMM TASK 30-73-34-400-001).
(b) If the fault continues:
NOTE : Remove the insulation from around the SENSOR 40DU, the
____ HEATER 42DU and the HEATER 41DU.
- apply cooling spray to the SENSOR 40DU for at least 10 s,
- stop for approx. 120 s,
- do a check of the temperature of the HEATER 42DU and HEATER 41DU.
1 If the HEATER 42DU and HEATER 41DU stay cold:
_
- replace the SENSOR-WASTE WATER DE ICING (40DU) (Ref. AMM TASK 30-71-17-000-001) and (Ref. AMM TASK 30-71-17-400-001).
2 If the HEATER 41DU stays cold:
_
- replace the HEATER ELEMENT-WASTE WATER DE ICING (41DU) (Ref. AMM TASK 30-71-53-000-001) and (Ref. AMM TASK 30-71-53-400-001).
3 If the HEATER 42DU stays cold:
_
- replace the HEATER ELEMENT-WASTE WATER DE ICING (42DU) (Ref. AMM TASK 30-71-53-000-001) and (Ref. AMM TASK 30-71-53-400-001).
(c) If one microfuse is not OK:
- do a check for a short circuit (Ref. ASM 30-71/01),
- replace the microfuse.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞30-71-00∞∞∞∞∞∞∞∞∞∞Page 211
May 01/05 CESR **ON A/C 151-199, 401-499,
D. If the green 'UNIT' LED and the green 'HTR' LED of the CONTROL UNIT 5DU come on:
- do the BITE test of the potable-water ice-protection system (Ref. AMM TASK 30-73-00-740-001).
(1) If the green III/IV LED of the CONTROL UNIT 3DW does not come on:
- do a check of the related microfuses.
(a) If the microfuses are OK:
- replace the CONTROL UNIT (3DW) (Ref. AMM TASK 30-73-34-000-001) and (Ref. AMM TASK 30-73-34-400-001).
(b) If the fault continues:
NOTE : Remove the insulation from around the SENSOR 141DU, the
____ HEATER 48DU,HEATER 49DU and HEATER 142DU.
- apply cooling spray to the SENSOR 141DU for at least 10 s,
- stop for approx. 120 s,
- do a check of the temperature of the HEATER 48DU, HEATER 49DU and HWATER 142DU.
1 If the HEATER 48DU, HEATER 49DU and HEATER 142DU stay cold:
_
- replace the SENSOR-WASTE WATER DE ICING (40DU) (Ref. AMM TASK 30-71-17-000-001) and (Ref. AMM TASK 30-71-17-400-001).
2 If the HEATER 48DU stays cold:
_
- replace the HEATER ELEMENT-WASTE WATER DE ICING (48DU) (Ref. AMM TASK 30-71-53-000-001) and (Ref. AMM TASK 30-71-53-400-001).
3 If the HEATER 49DU stays cold:
_
- replace the HEATER ELEMENT-WASTE WATER DE ICING (49DU) (Ref. AMM TASK 30-71-53-000-001) and (Ref. AMM TASK 30-71-53-400-001).
4 If the HEATER 142DU stays cold:
_
- replace the HEATER ELEMENT-WASTE WATER DE ICING (142DU) (Ref. AMM TASK 30-71-53-000-001) and (Ref. AMM TASK 30-71-53-400-001).
(c) If one microfuse is not OK:
- do a check for a short circuit (Ref. ASM 30-71/01),
- replace the microfuse.
R **ON A/C 301-399,
R D. If the green I/II LED of CONTROL UNIT 140DU does not come on:
R - do a check of the related microfuses.
R (1) If the microfuses are OK:
R - replace the CONTROL UNIT (140DU) (Ref. AMM TASK 30-71-34-000-001)
R and (Ref. AMM TASK 30-71-34-400-001).
R (2) If the fault continues:
R - do a check for the subsequent signals:
R 115 VAC at CONTROL UNIT 140DU connector A/14,
R 28 VDC at CONTROL UNIT 140DU connector A/16,
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本文链接地址：A320 Trouble Shooting Manual 排故手册 除冰和排雨(93)
