4. Fault Isolation
_______________
 A. If the test gives the maintenance message NO PHC3 DATA:
 - replace the CFDIU (1TW) (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
 (1) If the fault continues:
 - replace the PHC-3 (6DA3) (Ref. AMM TASK 30-31-34-000-002) and (Ref. AMM TASK 30-31-34-400-002).
 「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 ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page A230
 May 01/05R CES

 (2) If the fault continues:
 - do a check and repair the wiring from the CFDIU (1TW) to the PHC 3 (6DA3) from pins AB/2F, 2G to pins A/M, N (Ref. ASM 31-32/06).
 B. Do the test given in Para. 3.B.
 「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 ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page A231
 May 01/05R
 CES  Loss of the WHC 1 Output Bus by the CFDIU

 1. Possible Causes
_______________
 - CFDIU (1TW)

 - WHC-1 (2DG1)

 - wiring from the CFDIU (1TW) to the WHC 1 (2DG1)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 30-42-34-000-001 Removal of the Window Heat Computer (WHC)
 (2DG1,2DG2).
 AMM 30-42-34-400-001 Installation of the Window Heat Computer (WHC)

 (2DG1,2DG2).
 AMM 31-32-00-869-002 Procedure for Class 3 Faults Reading
 AMM 31-32-34-000-001 Removal of the CFDIU (1TW)
 AMM 31-32-34-400-001 Installation of the CFDIU (1TW)
 ASM 31-32/06

 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
123VU ANTI ICE/L/WHSLD 1DG1 AF10
 B. Test On the CFDS MENU page, get access to the AVIONICS STATUS page (Ref. AMM TASK 31-32-00-869-002).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message NO WHC1 DATA:
 - replace the CFDIU (1TW) (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
 (1) If the fault continues:
 - replace the WHC-1 (2DG1) (Ref. AMM TASK 30-42-34-000-001) and (Ref. AMM TASK 30-42-34-400-001).
 「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 : ALL ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page A232
 May 01/05R CES

 (2) If the fault continues:
 - do a check and repair the wiring from the CFDIU (1TW) to the WHC 1 (2DG1) from pins AA/8D, 8E to pins B/M, N (Ref. ASM 31-32/06).
 B. Do the test given in Para. 3.B.
 「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 ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page A233
 May 01/05R
 CES  Loss of the WHC 2 Output Bus by the CFDIU

 1. Possible Causes
_______________
 - CFDIU (1TW)

 - WHC-2 (2DG2)

 - wiring from the CFDIU (1TW) to the WHC 2 (2DG2)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 30-42-34-000-001 Removal of the Window Heat Computer (WHC)
 (2DG1,2DG2).
 AMM 30-42-34-400-001 Installation of the Window Heat Computer (WHC)

 (2DG1,2DG2).
 AMM 31-32-00-869-002 Procedure for Class 3 Faults Reading
 AMM 31-32-34-000-001 Removal of the CFDIU (1TW)
 AMM 31-32-34-400-001 Installation of the CFDIU (1TW)
 ASM 31-32/06

 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
　
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