- replace the CONTROL UNIT (15DU) (Ref. AMM TASK 30-71-34-000-001) and (Ref. AMM TASK 30-71-34-400-001).
(2) If there is no 115 VAC:
- do a check and repair the wiring between: CONTROL UNIT 15DU connector A/14 and CB 11DU (Ref. ASM 30-71/01).
(3) If there is no GND:
- do a check and repair the wiring between: CONTROL UNIT 15DU connector A/15 and GND (Ref. ASM 30-71/01).
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R **ON A/C 051-051,
R D. If the green 'UNIT' LED of the CONTROL UNIT 25DU does not come on:
R - replace the 25DU (25DU) (Ref. AMM TASK 30-71-34-000-001) and (Ref. AMM
R TASK 30-71-34-400-001).
R E. If the green 'HTR' LED of the CONTROL UNIT 25DU does not come on:
R - replace the 24DU (24DU) (Ref. AMM TASK 30-71-51-000-001) and (Ref. AMM
R TASK 30-71-51-400-001).
R (1) If the fault continues:
R - do a check and repair the wiring between:
R CONTROL UNIT 25DU connector A/4 and DRAINMAST 24DU connector A/D,
R CONTROL UNIT 25DU connector A/5 and DRAINMAST 24DU connector A/E,
R CONTROL UNIT 25DU connector A/8 and DRAINMAST 24DU connector A/B,
R DRAINMAST 24DU connector A/C and GND,
R DRAINMAST 24DU connector A/A and GND (Ref. ASM 30-71/01).
R F. If the green 'UNIT' LED and the green 'HTR' LED of the CONTROL UNIT 25DU
R do not come on:
R - do a check for the subsequent signals:
R 115VAC at CONTROL UNIT 25DU connector A/14,
R GND at CONTROL UNIT 25DU connector A/15 (Ref. ASM 30-71/01).
R (1) If the two signals are OK:
R - replace the 25DU (25DU) (Ref. AMM TASK 30-71-34-000-001) and (Ref.
R AMM TASK 30-71-34-400-001).
R (2) If there is no 115 VAC:
R - do a check and repair the wiring between:
R CONTROL UNIT 25DU connector A/14 and CB 21DU (Ref. ASM 30-71/01).
R (3) If there is no GND:
R - do a check and repair the wiring between:
R CONTROL UNIT 25DU connector A/15 and GND (Ref. ASM 30-71/01).
R G. If the green 'UNIT' LED and the green 'HTR' LED of the CONTROL UNIT 5DU
R CONTROL UNIT 25DU come on:
R - do the BITE test of the potable-water ice-protection system (Ref. AMM
R TASK 30-73-00-740-001).
R (1) If the green I/II LED of the CONTROL UNIT 33DW does not come on:
R - do a check of the related microfuses.
R (a) If the microfuses are OK:
R - replace the CONTROL UNIT (33DW) (Ref. AMM TASK 30-73-34-000-R 001) and (Ref. AMM TASK 30-73-34-400-001).
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R (b) If the fault continues:
R NOTE : Remove the insulation from around the SENSOR 50DU, the____
R HEATER 51DU and the HEATER 52DU.
R - apply cooling spray to the SENSOR 50DU for at least 10 s,
R - stop for approx. 120 s,
R - do a check of the temperature of the HEATER 51DU and HEATER
R 52DU.
R 1_ If the HEATER 51DU and HEATER 52DU stay cold:
R - replace the 50DU (50DU) (Ref. AMM TASK 30-71-17-000-001) and
R (Ref. AMM TASK 30-71-17-400-001).
R 2_ If the HEATER 51DU stays cold:
R - replace the HEATER 51DU (Ref. AMM TASK 30-71-53-000-001) and
R (Ref. AMM TASK 30-71-53-400-001).
R 3_ If the HEATER 52DU stays cold:
R - replace the HEATER 42DU (Ref. AMM TASK 30-71-53-000-001) and
R (Ref. AMM TASK 30-71-53-400-001).
R (c) If one microfuse is not OK:
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 除冰和排雨(95)
