Water Servicing-Panel Heating - Electrical Schematic
Figure 301
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201-299, 401-499, Aug 01/05 CES
R Water Servicing-Panel Heating - Electrical Schematic R Figure 301A
「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 : 301-399, ∞∞30-72-00∞∞∞∞∞∞∞∞∞∞Page 303
May 01/04 CES
POTABLE WATER ICE PROTECTION - FAULT ISOLATION PROCEDURES
_________________________________________________________
TASK 30-73-00-810-801
Ice Formation in the Potable Water Lines
1. Possible Causes
_______________
- CTL UNIT-POTABLE AND WASTE WATER DEICING (3DW)
- SENSOR-POTABLE WATER DE ICING (10DW) R - 300DW (300DW)
- HEATER(s)
- microfuse
- aircraft wiring
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
-------------------------------------------------------------------------------
30-71-00-810-805 Failure of FWD Waste-Water Ice-Protection System AMM 30-73-00-720-001 Functional Test of the Potable Water Ice-Protection AMM 30-73-00-740-001 BITE Test of the Potable Water Ice-Protection AMM 30-73-17-000-001 Removal of the Potable-Water De-icing Sensor (10DW) AMM 30-73-17-400-001 Installation of the Potable-Water De-icing Sensor
(10DW)
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)
AMM 30-73-53-000-001 Removal of the Potable-Water De-icing Heater Elements (4DW, 5DW, 6DW, 9DW)
AMM 30-73-53-400-001 Installation of the Potable-Water De-icing Heater Elements (4DW, 5DW, 6DW, 9DW)
ASM 30-73/01
3. Fault Confirmation
__________________
A. Do the BITE test of the potable water ice-protection (Ref. AMM TASK 30-73-00-740-001).
4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
A. Maintenance Action for CONTROL UNIT 3DW
(1) If the green I/II LED of CONTROL UNIT 3DW does not come on:
- do a check of the related microfuses:
(a) If the microfuses are OK:
- replace the CTL UNIT-POTABLE AND WASTE WATER DEICING (3DW) (Ref. AMM TASK 30-73-34-000-001) and (Ref. AMM TASK 30-73-34-400-001).
1 If the fault continues:
_
- do the functional test of the potable water ice protection (Ref. AMM TASK 30-73-00-720-001) and replace the related HEATER(s) which stay(s) cold (Ref. AMM TASK 30-73-53-000-001) and (Ref. AMM TASK 30-73-53-400-001).
a If all applicable HEATERs stay cold:
_
- replace the SENSOR-POTABLE WATER DE ICING (10DW) (Ref. AMM TASK 30-73-17-000-001) and (Ref. AMM TASK 30-73-17-400-001).
(b) If one microfuse is not OK:
- do a check for a short circuit and replace the microfuse (Ref. ASM 30-73/01).
(2) If the green III/IV LED of the CONTROL UNIT 3DW does not come on:
- do the trouble shooting of the FWD waste-water ice-protection system (Ref. TASK 30-71-00-810-805)
(3) If both green LEDs do not come on:
- replace the CTL UNIT-POTABLE AND WASTE WATER DEICING (3DW) (Ref. AMM TASK 30-73-34-000-001) and (Ref. AMM TASK 30-73-34-400-001).
(a) If the fault continues:
- do a check of the subsequent signals:
- 115VAC at connector 3DW-A/14,
- 28VDC at connector 3DW-A/16,
- GND at connector 3DW-A/12,
- GND at connector 3DW-A/15 (Ref. ASM 30-73/01).
1 If one signal is missing:
_
- do a check and repair of the aircraft wiring (Ref. ASM 30-73/01).
R **ON A/C 301-399,
R A. Maintenance Action for CONTROL UNIT 3DW
R (1) If the green I/II LED of CONTROL UNIT 3DW does not come on:
R - do a check of the related microfuses:
R (a) If the microfuses are OK:
R - replace the CTL UNIT-POTABLE AND WASTE WATER DEICING (3DW)
R (Ref. AMM TASK 30-73-34-000-001) and (Ref. AMM TASK 30-73-34-R 400-001).
R 1_ If the fault continues:
R - do the functional test of the potable water ice protection
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