W DOC AIRBUS | TSM A320F

Fault in the Generator Power

TASK 38-31-00-810-813-A
Fault in the Generator Power

1. Possible Causes
  • TRANSDUCER,DIFF.-PRES [42MG]
  • RELAY [36MG]
  • RELAY-FAN PHASE OFF [38MG]
  • GENERATOR,VACUUM [37MG]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 24-00-00-810-818-A
Computer Reset
ESPM 2046500
AMM 38-31-00-710-009
Operational Test of the Toilet Unit
AMM 38-31-00-740-001
BITE Test of the Vacuum Toilet System
ASM 383110
AMM 38-31-36-000-001
Removal of the Motor Start Relay
AMM 38-31-36-400-001
Installation of the Motor Start Relay
AMM 38-31-64-000-001
Removal of the Vacuum Generator
AMM 38-31-64-400-001
Installation of the Vacuum Generator
AMM 38-31-68-000-001
Removal of the Differential Pressure Transducer
AMM 38-31-68-400-001
Installation of the Differential Pressure Transducer
F MCDU Display ** ON A/C NOT FOR ALL
3. Fault Confirmation
Subtask 38-31-00-710-063-A ** ON A/C NOT FOR ALL
A. Test.
   (1) Do a test of the vacuum toilet system AMM 38-31-00-710-009.
Subtask 38-31-00-740-063-A ** ON A/C NOT FOR ALL
B. Do the bite test AMM 38-31-00-740-001.
4. Fault Isolation
Subtask 38-31-00-810-063-A ** ON A/C NOT FOR ALL
A. If the operational test is not satisfactory:
  • Refer to the bite test last leg or previous legs report.
   (1) If the LAST LEG REPORT or PREVIOUS LEGS REPORT page gives the maintenance message CHECK GEN POWER:
   (2) If the fault continues:
   (3) If the fault continues:
   (4) If the fault continues:
     (a) do a check to make sure that the motor start relay 36MG functions correctly when energized:
  • make sure that the voltage at the connector 36MG-A of the motor start relay is correct ASM 383110.
  • make sure that the circuit breakers 32MG, 33MG, 34MG are open.
  • with the circuit breakers 33MG open and 35MG closed do a continuity check between terminals L1-T1, L2-T2 and L3-T3 on the motor start relay 36MG ASM 383110.
     (b) Do a check to make sure that the motor start relay 36MG functions correctly when de-energized:
  • make sure that the circuit breakers 32MG, 33MG, 34MG and 35MG are open.
  • make sure that there is no voltage at the connector 36MG-A of the motor, do a continuity check between terminals L1-T1, L2-T2 and L3-T3 on the motor start relay 36MG ASM 383110.
   (5) If there is no continuity in step (4) (a), or continuity in step (4) (b):
   (6) If the fault continues:
   (7) If the fault continues:
Subtask 38-31-00-810-063-C ** ON A/C NOT FOR ALL
A. If the operational test is not satisfactory:
  • Refer to the bite test last leg or previous legs report.
    F MCDU Display ** ON A/C NOT FOR ALL
   (1) If the LAST LEG REPORT or PREVIOUS LEGS REPORT page gives the maintenance message VACU GEN SUPPLY:
   (2) If the fault continues:
     (a) Do a check to make sure that the motor start relay 36MG functions correctly when energized:
  • make sure that the voltage at the connector 36MG-A of the motor start relay is correct ASM 383110.
  • make sure that the circuit breakers 32MG, 33MG, 34MG are open.
  • with the circuit breakers 33MG open and 35MG closed do a continuity check between terminals L1-T1, L2-T2 and L3-T3 on the motor start relay 36MG ASM 383110.
     (b) Do a check to make sure that the motor start relay 36MG functions correctly when de-energized:
  • make sure that the circuit breakers 32MG, 33MG, 34MG and 35MG are open.
  • make sure that there is no voltage at the connector 36MG-A of the motor, do a continuity check between terminals L1-T1, L2-T2 and L3-T3 on the motor start relay 36MG ASM 383110.
   (3) If there is no continuity in step (2) (a), or continuity in step (2) (b):
   (4) If the fault continues:
   (5) If the fault continues:
Subtask 38-31-00-710-079-A ** ON A/C NOT FOR ALL
B. Test
   (1) Do the test as given in paragraph 3. A. to check the correct operation.
   (2) After the subsequent flight, make sure that the fault does not continue.
[Rev.8 from Aug 2018] 2026.04.04 04:34:13 UTC
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