R CAUTION : BEFORE YOU START THE CHECK OF IDG WIRING THAT INCLUDES CONNECTORS,
_______ R EXAMINE EACH CONNECTOR TO MAKE SURE THAT THERE IS NO OIL IN IT. R IF YOU FIND OIL, CLEAN THE CONNECTOR AND CONNECT IT AGAIN. R IF THE FAILURE CONTINUES, DO THE TROUBLE SHOOTING PROCEDURE AS R GIVEN BELOW.
 「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 : 401-499, ∞∞24-23-00∞∞∞∞∞∞∞∞∞∞Page 227
 Aug 01/05 CES

R A. If the fault symptom is identified by the CFDS message GEN APU (8XS) EX
R FLD/ GAPCU (24XG) and the upper ECAM-DU warning APU GEN FAULT:
R - do the check of the resistance of the APU generator exciter-field (Ref.
R ASM 24-23/01) between:

R . pins A/9 and A/10 of the APU generator (7.67 ohms plus or minus 0.73
R ohms)
R - do a check of the wiring for a short-circuit between:

R . pin A/9 of the APU generator and APU generator case

R . pin A/10 of the APU generator and APU generator case.

R NOTE : Do the check:
____ R - GTCP 36-300: for metal contamination of the lube filter element R (Ref. AMM TASK 49-91-45-200-002) and the alternator scavenge R filter element (Ref. AMM TASK 49-91-41-200-001). R or R - APS 3200: for metal contamination of the pressure oil filter R element (Ref. AMM TASK 49-91-41-920-001) and the AC-generator R scavenge filter element (Ref. AMM TASK 49-91-41-200-002). R or R - 131-9(A): for metal contamination of the oil filters (Ref. AMM R TASK 49-91-41-200-002).
R (1) If the resistance values are out of the specified limits:
R - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and
R (Ref. AMM TASK 24-23-51-400-001).

R (2) If the resistance values are in the specified limits:
R - do a check of the wiring (Ref. ASM 24-23/01) for a short to ground,
R a short circuit or an open circuit between:

R . pin A/9 of the APU generator and pin C/12 of the GAPCU

R . pin A/10 of the APU generator and pin C/13 of the GAPCU

R . pin C/7 and pins C/12, C/13 of the GAPCU.

R (a) If the wiring is not correct:
R - repair or replace as necessary.

R (b) If the wiring is correct:
R - replace the GAPCU (24XG) (Ref. AMM TASK 24-41-34-000-001) and
R (Ref. AMM TASK 24-41-34-400-001).

R  1_  If the fault continues:
R  - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) 
R  and (Ref. AMM TASK 24-23-51-400-001) 

R B. Make sure that the aircraft electrical circuits operate correctly in APU R configuration.
R (1) Energize the aircraft electrical circuits from the APU (Ref. AMM TASK R 24-41-00-861-002).
R (2) Let the APU generator operate for five minutes to make sure that it R operates correctly.
 「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 : 401-499, ∞∞24-23-00∞∞∞∞∞∞∞∞∞∞Page 228
 Aug 01/05 CESR (3) De-energize the aircraft electrical circuits from the APU (Ref. AMM R TASK 24-41-00-862-002).

R TASK 24-23-00-810-814

R Failure of the AC Current Transformer of the APU Generator or its Wiring R 1. Possible Causes
_______________
R - GEN-APU (8XS) R - GAPCU (24XG) R - wiring
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-23-51-000-001 R AMM 24-23-51-400-001 R AMM 24-41-00-861-002 R R AMM 24-41-00-862-002 R R AMM 24-41-34-000-001 R R AMM 24-41-34-400-001 R R ASM 24-23/01
R 3. Fault Confirmation
__________________
R A. Test
R Not applicable.

Removal of the APU Generator 8XS Installation of the APU Generator 8XS Energize the Aircraft Electrical Circuits from the APU De-energize the Aircraft Electrical Circuits Supplied from the APU Removal of the Ground Auxiliary Power Control Unit (GAPCU) (24XG) Installation of the Ground Auxiliary Power Control Unit (GAPCU) (24XG)
R NOTE : As the APU GEN was set to OFF because of a true failure, the fault
____ R confirmation is not necessary.
R 4. Fault Isolation
_______________
R CAUTION : BEFORE YOU START THE CHECK OF IDG WIRING THAT INCLUDES CONNECTORS,
_______ R EXAMINE EACH CONNECTOR TO MAKE SURE THAT THERE IS NO OIL IN IT. R IF YOU FIND OIL, CLEAN THE CONNECTOR AND CONNECT IT AGAIN. R IF THE FAILURE CONTINUES, DO THE TROUBLE SHOOTING PROCEDURE AS R GIVEN BELOW.
　
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