- do a check and repair the wiring if necessary between: CONTROL UNIT 15DU connector A/19 and DEU-B 300RH5 connector C/35, CONTROL UNIT 15DU connector A/14 and CB 11DU, CONTROL UNIT 15DU connector A/15 and GND (Ref. ASM 30-71/01).
 (a) If the fault continues:
 - replace the DEU-B (300RH5) (Ref. AMM TASK 23-73-47-000-001) and (Ref. AMM TASK 23-73-47-400-001).

 (3) If the fault continues:

 - do the trouble shooting procedures for the DEU-B 300RH5 (Ref. TSM 23730081083000).
 B. Do the test as given in Para. 3.A.
 5. Close-up
________
 A. Put the aircraft back to its initial configuration.

 Failure of FWD Waste-Water Ice-Protection System
 1. Possible Causes
_______________
 - CONTROL UNIT (5DU)

 - DRAINMAST-FWD (4DU)

 - SENSOR-WASTE WATER DE ICING (40DU)

 - wiring

 - CONTROL UNIT (3DW)

 - HEATER ELEMENT-WASTE WATER DE ICING (41DU)

 - HEATER ELEMENT-WASTE WATER DE ICING (42DU)

 - microfuse

 - HEATER ELEMENT-WASTE WATER DE ICING (48DU)

 - HEATER ELEMENT-WASTE WATER DE ICING (49DU)

 - HEATER ELEMENT-WASTE WATER DE ICING (142DU) R - CONTROL UNIT (140DU) R - SENSOR-WASTE WATER DE ICING (141DU) R - HEATER ELEMENT-WASTE WATER DE ICING (146DU) R - HEATER ELEMENT-WASTE WATER DE ICING (147DU)
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific cooling spray
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 30-71-00-710-002 Operational Test of the Waste-Water Ice-Protection
 Heater-Elements AMM 30-71-17-000-001 Removal of the Waste-Water De-icing Sensor (40DU) AMM 30-71-17-400-001 Installation of the Waste-Water De-icing Sensor
 (40DU)
 AMM 30-71-34-000-001 Removal of the Waste-Water Ice-Protection
 Control-Unit
 AMM 30-71-34-400-001 Installation of the Waste-Water Ice-Protection

 Control-Unit AMM 30-71-51-000-001 Removal of the Drain Mast AMM 30-71-51-400-001 Installation of the Drain Mast AMM 30-71-53-000-001 Removal of the Waste-Water De-icing Heater Elements
 (41DU, 42DU)
 「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 209
 May 01/04 CES -------------------------------------------------------------------------------

REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
R AMM 30-71-53-000-003 Removal of the Waste-Water De-icing Heater Elements
R (142DU, 146DU, 147DU) AMM 30-71-53-400-001 Installation of the Waste-Water De-icing Heater Elements (41DU, 42DU)
R AMM 30-71-53-400-003 Installation of the Waste-Water De-icing Heater
R Elements (142DU, 146DU, 147DU) AMM 30-73-00-740-001 BITE Test of the Potable Water Ice-Protection AMM 30-73-34-000-001 Removal of the Potable and Waste Water Ice Protection Control Unit (3DW) AMM 30-73-34-400-001 Installation of the Potable and Waste Water Ice Protection Control Unit (3DW) ASM 30-71/01
 3. Fault Confirmation
__________________
 A. Do the operational test of the waste-water ice-protection system (Ref. AMM TASK 30-71-00-710-002).
 4. Fault Isolation
_______________
 A. If the green 'UNIT' LED of the CONTROL UNIT 5DU does not come on:
 - replace the CONTROL UNIT (5DU) (Ref. AMM TASK 30-71-34-000-001) and (Ref. AMM TASK 30-71-34-400-001).
 B. If the green 'HTR' LED of the CONTROL UNIT 5DU does not come on:
 - replace the DRAINMAST-FWD (4DU) (Ref. AMM TASK 30-71-51-000-001) and (Ref. AMM TASK 30-71-51-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring between: CONTROL UNIT 5DU connector A/4 and DRAINMAST 4DU connector A/D, CONTROL UNIT 5DU connector A/5 and DRAINMAST 4DU connector A/E, CONTROL UNIT 5DU connector A/8 and DRAINMAST 4DU connector A/B, DRAINMAST 4DU connector A/C and GND, DRAINMAST 4DU connector A/A and GND (Ref. ASM 30-71/01).
 C. If the green 'UNIT' LED and the green 'HTR' LED of the CONTROL UNIT 5DU do not come on:
 - do a check for the subsequent signals: 115 VAC at CONTROL UNIT 5DU connector A/14, GND at CONTROL UNIT 5DU connector A/15 (Ref. ASM 30-71/01).
　
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