W DOC AIRBUS | TSM A320F

Fuel - All FQIS Indicators Show Blank During Refuel on Battery

TASK 28-42-00-810-870-A
Fuel - All FQIS Indicators Show Blank During Refuel on Battery

WARNING: OBEY THE FUEL SAFETY PROCEDURES.
1. Possible Causes
  • RELAY-FQI POWER SUPPLY CHANGE-OVER [9QT]
  • diode between pins 32 and 31 (part of diode module 1162VD)
  • CNTOR-DC NORM BUS 1 SWITCHING [1PC1]
  • diode between pins 26 and 11 (part of diode module 80VD)
  • LEVER-L/G NORM CTL [6GA]
  • MSW-REFUEL/DEFUEL CTL PNL DOOR POSITION [20QU]
  • aircraft wiring
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
MULTIMETER - STANDARD
 B. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 24-67-00-810-801-A
Refueling not Possible
AMM 12-11-28-650-004
Pressure Refuel with Manual Control
ESPM 2052210
ESPM 2053210
AMM 24-35-55-000-001
Removal of the Contactor
AMM 24-35-55-400-001
Installation of the Contactor
ASM 282501
ASM 284203
AMM 32-31-11-000-001
Removal of the Landing Gear Normal Control lever
AMM 32-31-11-400-001
Installation of the Landing Gear Normal Control Lever
3. Fault Confirmation
Subtask 28-42-00-865-107-A
A. Table of the circuit breakers used in this procedure:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
121VUFUEL/FQI/CHANNEL/1 AND 28QTL26
Subtask 28-42-00-710-111-A
B. Test
NOTE: This procedure is applicable to battery operation only.
   (1) Make sure that the C/B-8QT is closed.
   (2) Do the procedure only for a Pressure Refuel with Manual Control AMM 12-11-28-650-004.
   (3) If, on the refuel panel 800VU, all the FQIS indicators:
     (a) Show blank during the time the TEST switch (2QJ) is set to LTS and when the switch is released to the central normal position:
NOTE: This points to the 28VDC FUELING BUS 2 supply failure.
     (b) Operate as specified during the time the TEST switch (2QJ)is set to LTS but show blank when the switch is released to the central normal position:
  • go to Para. 4.A.
NOTE: This shows the 28VDC FUELING BUS 2 supply is available through C/B-8QT (because the FUEL QTY, PRESELECTED and ACTUAL LED displays all show 8s during the test).
     (c) Operate as specified during the time the TEST switch (2QJ)is set to LTS and when the switch is released to the central normal position:
  • no maintenance steps are necessary.
4. Fault Isolation
Subtask 28-42-00-810-127-B ** ON A/C NOT FOR ALL
A. Procedure
   (1) Do a check of the items that follow ASM 284203 and replace, if necessary:
     (a) The RELAY-FQI POWER SUPPLY CHANGE-OVER [9QT] .
     (b) The diode between pins 32 and 31 (part of diode module 1162VD).
     (c) The CNTOR-DC NORM BUS 1 SWITCHING [1PC1] AMM 24-35-55-000-001 and AMM 24-35-55-400-001.
     (d) The diode between pins 26 and 11 (part of diode module 80VD).
     (e) The LEVER-L/G NORM CTL [6GA] AMM 32-31-11-000-001 and AMM 32-31-11-400-001.
     (f) The MSW-REFUEL/DEFUEL CTL PNL DOOR POSITION [20QU] .
   (2) Use a MULTIMETER - STANDARD, to do a check of the aircraft wiring (RL-9QT 28VDC supply) ASM 284203 between the:
  • C/B-FUEL/FQI/CHANNEL/1 AND 2 (8QT) and the RELAY-FQI POWER SUPPLY CHANGE-OVER (9QT), terminals X1, C1 and B1.
   (3) Use a multimeter, to do a check of the aircraft wiring (RL-9QT control ground) ASM 284203 between the:
  • RELAY-FQI POWER SUPPLY CHANGE-OVER (9QT), terminal X2 and the diode module 1162VD, terminal 32
  • diode module 1162VD, terminal 31 and the CNTOR-DC NORM BUS 1 SWITCHING connector 1PC1-B, pin 6
  • CNTOR-DC NORM BUS 1 SWITCHING connector 1PC1-B, pin 8 and the diode module 80VD, terminal 26
  • diode module 80VD, terminal 11 and the LEVER-L/G NORM CTL (6GA) connector 6GA-A, pin E
  • LEVER-L/G NORM CTL (6GA) connector 6GA-A, pin L and the REFUEL/DEFUEL CTL PNL DOOR POSITION MICROSWITCH (20QU), terminal D
  • REFUEL/DEFUEL CTL PNL DOOR POSITION MICROSWITCH (20QU), terminal F and the aircraft ground.
   (4) Repair all the unserviceable wiring and connectors.
   (5) Do the test given in Para. 3.B.
   (6) If the fault continues:
     (a) Do a check ESPM 2052210 of the aircraft wiring that follows ASM 282501:
  • between the C/B 2QU and the relay 14QU, pin A2 and X1
  • between relay 14QU, pin A1 and the connector 4024VC, pin L
  • between the relay 14QU, pin X2 and the switch 20QU, pin A
  • between the switch 20QU, pin C and the aircraft ground point.
     (b) Repair all the unserviceable wiring and connectors ESPM 2053210.
     (c) Do the tests given in Para. 3.B.
   (7) If the fault continues:
     (a) Do a check ESPM 2052210 of the aircraft wiring that follows ASM 284203:
  • between the C/B 8QT and the relay 14QU, pin B2
  • between the C/B 8QT and the FQIC 3QT, connector AC pin 9E
  • between the relay 14QU, pin C2 and the aircraft ground point
  • between the relay 14QU, pin C1 and the FQIC 3QT, connector AC pin 8C
  • between the relay 14QU, pin B1 and the panel 6QT, connector A pin E
  • between the relay 14QU, pin B1 and the panel 5QT, connector A pin E.
     (b) Repair all the unserviceable wiring and connectors ESPM 2053210.
     (c) Do the tests given in Para. 3.B.
Subtask 28-42-00-810-127-C ** ON A/C NOT FOR ALL
A. Procedure
   (1) Do a check of the items that follow ASM 284203 and replace, if necessary:
     (a) The RELAY-FQI POWER SUPPLY CHANGE-OVER [9QT] .
     (b) The diode between pins 32 and 31 (part of diode module 1162VD).
     (c) The CNTOR-DC NORM BUS 1 SWITCHING [1PC1] AMM 24-35-55-000-001 and AMM 24-35-55-400-001.
     (d) The diode between pins 26 and 11 (part of diode module 80VD).
     (e) The LEVER-L/G NORM CTL [6GA] AMM 32-31-11-000-001 and AMM 32-31-11-400-001.
     (f) The MSW-REFUEL/DEFUEL CTL PNL DOOR POSITION [20QU] .
   (2) Use a MULTIMETER - STANDARD, to do a check of the aircraft wiring (RL-9QT 28VDC supply) ASM 284203 between the:
  • C/B-FUEL/FQI/CHANNEL/1 AND 2 (8QT) and the RELAY-FQI POWER SUPPLY CHANGE-OVER (9QT), terminals X1, C1 and B1.
   (3) Use a multimeter, to do a check of the aircraft wiring (RL-9QT control ground) ASM 284203 between the:
  • RELAY-FQI POWER SUPPLY CHANGE-OVER (9QT), terminal X2 and the diode module 1162VD, terminal 32
  • diode module 1162VD, terminal 31 and the CNTOR-DC NORM BUS 1 SWITCHING connector 1PC1-B, pin 6
  • CNTOR-DC NORM BUS 1 SWITCHING connector 1PC1-B, pin 8 and the diode module 80VD, terminal 26
  • diode module 80VD, terminal 11 and the LEVER-L/G NORM CTL (6GA) connector 6GA-A, pin E
  • LEVER-L/G NORM CTL (6GA) connector 6GA-A, pin L and the REFUEL/DEFUEL CTL PNL DOOR POSITION MICROSWITCH (20QU), terminal D
  • REFUEL/DEFUEL CTL PNL DOOR POSITION MICROSWITCH (20QU), terminal F and the aircraft ground.
   (4) Repair all the unserviceable wiring and connectors.
   (5) Do the test given in Para. 3.B.
   (6) If the fault continues:
     (a) Do a check ESPM 2052210 of the aircraft wiring that follows ASM 282501:
  • between the C/B 2QU and the relay 14QU, pin A2 and X1
  • between relay 14QU, pin A1 and the connector 4024VC, pin L
  • between the relay 14QU, pin X2 and the switch 20QU, pin A
  • between the switch 20QU, pin C and the aircraft ground point.
     (b) Repair all the unserviceable wiring and connectors ESPM 2053210.
     (c) Do the tests given in Para. 3.B.
   (7) If the fault continues:
     (a) Do a check ESPM 2052210 of the aircraft wiring that follows ASM 284203:
  • between the C/B 8QT and the relay 14QU, connector A pin B2
  • between the C/B 8QT and the FQIC 3QT, connector AC pin 9E
  • between the relay 14QU, connector A pin C2 and the aircraft ground point
  • between the relay 14QU, connector A pin C1 and the FQIC 3QT, connector AC pin 8C
  • between the relay 14QU, connector A pin B1 and the panel 5QT, connector A pin E.
     (b) Repair all the unserviceable wiring and connectors ESPM 2053210.
     (c) Do the tests given in Para. 3.B.
[Rev.8 from Aug 2018] 2026.04.04 04:29:09 UTC
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