- replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and (Ref. AMM TASK 24-23-51-400-001).

 (b) If the resistance values are in the specified limits:

 - make sure there is electrical insulation between the pins A/9 and A/10 of the APU GEN and the case.
 1 If there is no insulation:
_
 - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and (Ref. AMM TASK 24-23-51-400-001).
 2 If there is insulation:
_
 - replace the GCU-APU (1XS) (Ref. AMM TASK 24-23-34-000-001) and (Ref. AMM TASK 24-23-34-400-001).
 NOTE : Do not remove the APU GCU before you do the other steps
____ of the trouble shooting.
 **ON A/C 051-099,
 A. If the fault symptom is identified by the CFDS message CHECK GCU APU PIN C1 C5 GEN APU PIN A9 A10 and the upper ECAM DU warning APU GEN FAULT:
 - do a check of the wiring for open circuit or short to ground between respectively the APU generator pins A/9, A/10 and the APU GCU pins C/1 and C/5 (Ref. ASM 24-23/01).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page A200
 201-210, Aug 01/05 CES NOTE : Do the check of the APU alternator and lube pump oil filters for

____ metal contamination (Ref. AMM TASK 49-91-41-200-001) and (Ref. AMM TASK 49-91-45-200-002).
 (1) If the wiring is not correct:

 - repair it.

 (2) If the wiring is correct:

 - do a resistance check of the exciter field of the APU GEN between the pins A/9 and A/10. Normal resistance: 7.67 Ohms plus or minus
 0.73 Ohms at 25.C.
 (a) If the resistance is out of the specified limits:

 - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and (Ref. AMM TASK 24-23-51-400-001).

 (b) If the resistance is in the specified limits:

 - make sure that the pins A/9 and A/10 are electrically insulated from the case.
 1 If not insulated:
_
 - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and (Ref. AMM TASK 24-23-51-400-001).
 2 If insulated:
_
 - replace the GCU-APU (1XS) (Ref. AMM TASK 24-23-34-000-001) and (Ref. AMM TASK 24-23-34-400-001).
 NOTE : Do not remove the APU GCU before you do the other steps
____ of the trouble shooting.
 **ON A/C 106-149, 211-299, 301-399,
 A. If the fault symptom is identified by the CFDS message CHECK GCU APU PIN C1 C5 GEN APU PIN A9 A10 and the upper ECAM DU warning APU GEN FAULT:
 - do a check of the wiring for open circuit or short to ground between respectively the APU generator pins A/9, A/10 and the APU GCU pins C/1 and C/5 (Ref. ASM 24-23/01).
 NOTE : Do the check of the pressure oil filter element and the
____ AC-generator scavenge filter element for metal contamination (Ref. AMM TASK 49-91-41-920-001) and (Ref. AMM TASK 49-91-41-920-002).
 (1) If the wiring is not correct:

 - repair it.

 (2) If the wiring is correct:

 - do a resistance check of the exciter field of the APU GEN between the pins A/9 and A/10. Normal resistance : 7.67 Ohms plus or minus
 0.73 Ohms at 25.C.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 051-099, 106-149, 211-299, 301-399, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page A201
 Aug 01/05 CES

 (a) If the resistance is out of the specified limits:

 - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and (Ref. AMM TASK 24-23-51-400-001).

 (b) If the resistance is in the specified limits:

 - make sure that the pins A/9 and A/10 are electrically insulated from the case.
 1 If not insulated:
_
 - replace the GEN-APU (8XS) (Ref. AMM TASK 24-23-51-000-001) and (Ref. AMM TASK 24-23-51-400-001).
 2 If insulated:
_
 - replace the GCU-APU (1XS) (Ref. AMM TASK 24-23-34-000-001) and (Ref. AMM TASK 24-23-34-400-001).
 NOTE : Do not remove the APU GCU before you do the other steps
____ of the trouble shooting.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 B. Make sure that the aircraft electrical circuits operate correctly in APU configuration.
 (1) Energize the aircraft electrical circuits from the APU (Ref. AMM TASK 24-41-00-861-002).

 (2) De-energize the aircraft electrical circuits from the APU (Ref. AMM TASK 24-41-00-862-002).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page A202
　
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