W DOC AIRBUS | TSM A320F

Unwanted Warning from the GEN1

TASK 24-22-00-810-811-A
Unwanted Warning from the GEN1

1. Possible Causes
  • P/BSW-ELEC/GEN 1 [3XU1]
  • GCU-1 [1XU1]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
ASM 242202
AMM 24-22-34-000-001
Removal of the GCU-1(2)
AMM 24-22-34-400-001
Installation of the GCU-1(2)
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002
De-energize the Aircraft Electrical Circuits Supplied from the External Power
AMM 31-60-00-860-001
EIS Start Procedure
AMM 71-00-00-710-003
Engine Automatic Start
AMM 71-00-00-710-028
Engine Shutdown
AMM 71-00-00-860-814
Shutdown of the Engine
AMM 71-00-00-860-823
Start the Engine (Normal Automatic Start)
3. Fault Confirmation
Subtask 24-22-00-860-058-B ** ON A/C NOT FOR ALL
A. Job Set-up
   (1) Push the GEN 1 pushbutton switch (3XU1).
   (2) Aircraft Maintenance Configuration
     (a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
     (b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
   (3) Start the engine 1 AMM 71-00-00-710-003.
Subtask 24-22-00-860-058-D ** ON A/C NOT FOR ALL
A. Job Set-up
   (1) In the cockpit, on the ELEC panel 35VU:
  • Push the GEN 1 pushbutton switch (3XU1).
   (2) Aircraft Maintenance Configuration
     (a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
     (b) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
   (3) Start engine 1 AMM 71-00-00-860-823.
Subtask 24-22-00-710-061-A
B. Test
ACTION
RESULT
1.On the ECAM control panel:
  • push the ELEC key to get the ELEC page.
On the upper ECAM DU:
  • the GEN 1 OFF message comes into view.
2.On the ELEC panel 35VU:
  • release and push the GEN 1 pushbutton switch (3XU1).
If on the upper ECAM DU:
  • the GEN 1 OFF message goes out of new, stop the trouble shooting.
    If on the upper ECAM DU:
  • the GEN 1 OFF message remains on, continue the trouble shooting (refer to the fault isolation which follows).
4. Fault Isolation
Subtask 24-22-00-810-060-A ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • replace the P/BSW-ELEC/GEN 1 [3XU1] .
   (1) If the fault continues:
     (a) If the fault continues:
  • do a check and repair the wiring between respectively:
    . the pin AB/2D of the GCU 1 and the pin D3 of the GEN 1 pushbutton switch (3XU1)
    . the pins AA/5B and AA/6C of the GCU 1 and respectively the pins D1 and D2 of the GEN 1 pushbutton switch (3XU1)
    . the pin AA/12C of the GCU 1 and the pin C3 of the GEN 1 pushbutton switch (3XU1)
    . the pin C1 of the GEN 1 pushbutton switch (3XU1) and the ground, through the EMER ELEC PWR/GEN 1 LINE pushbutton switch (13XU) and the relay (20XU) ASM 242202.
Subtask 24-22-00-810-060-B ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • replace the P/BSW-ELEC/GEN 1 [3XU1] .
   (1) If the fault continues:
     (a) If the fault continues:
  • do a check and repair the wiring between:
    . the pin AA/1C of the GCU 1 and the pin D3 of the ELEC/GEN 1 pushbutton switch (3XU1)
    . the pins AA/2G and AA/4E of the GCU 1 and the pins D1 and D2 of the ELEC/GEN 1 pushbutton switch
    . the pin AB/10J of the GCU 1 and the pin C3 of the ELEC/GEN 1 pushbutton switch
    . the pin C1 of the ELEC/GEN 1 pushbutton switch and the ground, through the EMER ELEC PWR/GEN 1 LINE pushbutton switch (13XU) and the relay (20XU) ASM 242202.
Subtask 24-22-00-710-062-A
B. Do the test given in Para. 3.
5. Close-up
Subtask 24-22-00-860-059-B ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
   (1) Stop the engine 1 AMM 71-00-00-710-028.
   (2) Put the aircraft back to its initial configuration.
   (3) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.
Subtask 24-22-00-860-059-D ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
   (1) Stop engine 1 AMM 71-00-00-860-814.
   (2) Put the aircraft back to its initial configuration.
   (3) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:26:35 UTC
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