R (Ref. AMM TASK 31-60-00-860-001).
R (2) On the ELEC panel 35VU:
R - push, release and push again the GEN 2 pushbutton switch (3XU2).
R (3) Do the operational test of the GAPCU (Ref. AMM TASK 24-41-00-740-
R 002).
R (4) Start the engine 2 (Ref. AMM TASK 71-00-00-710-003).
R **ON A/C ALL
C. Do this test:
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
On the ECAM control panel: On the lower ECAM display unit:
- get the ELEC page. - the correct electrical parameters of GEN 2 are shown and AC 2 busbar is supplied by GEN 2.
5. Close-up
________
A. Put the aircraft back to its initial configuration.
(1) Stop the engine 2 (Ref. AMM TASK 71-00-00-710-028).
(2) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
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INTEGRATED DRIVE GENERATOR SYSTEM (IDG, GCU) - TASK SUPPORTING DATA
___________________________________________________________________
1. Interval DPI Check and Filter Replacement after DPI Reset
_________________________________________________________ This figure is not valable for the Extended Range Twin-Engined Aircraft Operations (ETOPS) (Ref. Fig. 301)
Interval DPI Check and Filter Replacement after DPI Reset
Figure 301
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AC MAIN GENERATION - FAULT ISOLATION PROCEDURES
_______________________________________________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
TASK 24-22-00-810-802
Difference in Current between the IDG 1 Current Transformer and the AC Current
Transformer 1
1. Possible Causes
_______________
- CT-AC, 1 (42XU1)
- CT-AC, 1 (42XU3)
- GCU-1 (1XU1)
- wiring
- 4000XU
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 24-21-51-000-040 Removal of the Integrated Drive Generator -IDG 1(2),(4000XU) AMM 24-21-51-400-040 Installation of the Integrated Drive Generator -IDG 1(2),(4000XU) AMM 24-22-17-000-001 Removal of the AC Current Transformers (41XU1, 41XU2, 42XU1, 42XU2, 42XU3 and 42XU4) AMM 24-22-17-400-001 Installation of the AC Current Transformers (41XU1,
41XU2, 42XU1, 42XU2, 42XU3 and 42XU4) AMM 24-22-34-000-001 Removal of the GCU-1(2) (1XU1, 1XU2) AMM 24-22-34-400-001 Installation of the GCU-1(2) (1XU1, 1XU2) AMM 24-41-00-740-002 Operational Test of the Ground power Control Unit
(GPCU)
ASM 24-22/01
3. Fault Confirmation
__________________
A. Test Do the operational test of the GPCU and do the check of class 3 faults of the GPCU from the CFDS (Ref. AMM TASK 24-41-00-740-002).
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4. Fault Isolation
_______________
A. If the test gives the maintenance message CHECK GCU1 PIN B11D, B13D:
- do a check of the wiring for short to ground or open circuit between respectively: . the pin B/11D of the GCU 1 and the pin A/4 of each AC1 current transformer 42XU1 and 42XU3 . the pin B/13D of the GCU 1 and the pin A/1 of the IDG 1 (Ref. ASM 24-22/01).
(1) If the wiring is not correct:
- repair it.
(2) If the wiring is correct:
- do an impedance check of the internal wiring of the current transformers (42XU1 and 42XU3) between the pin A/4 and successively the pins A/1, A/2, A/3.
NOTE : The normal impedance is 10.15 Ohms plus or minus 3.45 Ohms.
____
- then do a check for insulation between the pin A/6 and successively the pins A/1, A/2, A/3, A/4.
(a) If the values are out of the specified tolerances:
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