- 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).
「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 216
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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).
「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 : 051-051, ∞∞30-71-00∞∞∞∞∞∞∞∞∞∞Page 217
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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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