W DOC AIRBUS | TSM A320F

LIQUID LVL SNSR OR LIQUID LVL XMTR OR VAC SYS CONT Fault

TASK 38-31-00-810-822-A
LIQUID LVL SNSR OR LIQUID LVL XMTR OR VAC SYS CONT Fault

1. Possible Causes
  • Liquid Level Transmitter (LLT) reference line
  • WATER SEPERATOR [3302MM]
  • GENERATOR,VACUUM [37MG]
  • XMTR-LEVEL [40MG]
  • SENSOR,LEVEL [41MG]
  • CONTROLLER VACUUM SYS [31MG]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 24-00-00-810-818-A
Computer Reset
AMM 38-31-00-100-009
Cleaning of the Liquid Level Transmitter (LLT) Reference Line
AMM 38-31-00-710-002
Operational Test of the Vacuum Toilet System
AMM 38-31-00-740-001
BITE Test of the Vacuum Toilet System
AMM 38-31-34-000-001
Removal of the Vacuum System Controller
AMM 38-31-34-400-001
Installation of the Vacuum System Controller
AMM 38-31-62-000-001
Removal of the Liquid Level Transmitter
AMM 38-31-62-400-001
Installation of the Liquid Level Transmitter
AMM 38-31-63-000-001
Removal of the Liquid Level Sensor
AMM 38-31-63-400-001
Installation of the Liquid Level Sensor
AMM 38-31-64-000-001
Removal of the Vacuum Generator
AMM 38-31-64-400-001
Installation of the Vacuum Generator
AMM 38-31-67-610-001
Inspect Water Separator and Associated Filter Element, and Clean as Necessary
F MCDU Display
3. Fault Confirmation
Subtask 38-31-00-710-090-A ** ON A/C NOT FOR ALL
A. Test
   (1) Do a test of the vacuum toilet system AMM 38-31-00-710-002.
Subtask 38-31-00-740-064-A ** ON A/C NOT FOR ALL
B. Do the bite test AMM 38-31-00-740-001.
4. Fault Isolation
Subtask 38-31-00-810-103-C ** ON A/C NOT FOR ALL
A. If the operational test operates OK:
  • Refer to the bite test last leg or previous leg report page.
    F MCDU Display ** ON A/C NOT FOR ALL
   (1) If the LAST LEG or PREVIOUS LEG REPORT gives the maintenance message
LIQD LVL XMTR/
LIQD LVL SNSR/VSC:
   (2) If the fault continues:
   (3) If the LLT reference line is contaminated,
   (4) If the fault continues:
   (5) If the fault continues:
   (6) If the fault continues:
Subtask 38-31-00-810-103-F ** ON A/C NOT FOR ALL
A. If the operational test operates OK:
  • Refer to the bite test last leg or previous leg report page.
    F MCDU Display ** ON A/C NOT FOR ALL
   (1) If the LAST LEG or PREVIOUS LEG REPORT gives the maintenance message
LIQUID LVL SNSR OR
LIQUID LVL XMTR OR
VAC SYS CONT:
NOTE: This is when the VSC with the P/N 14404-001-1 or P/N 14404-11 is installed.
   (2) If the fault continues:
   (3) If the LLT reference line is contaminated,
   (4) If the fault continues:
   (5) If the fault continues:
   (6) If the fault continues:
   (7) If the THROUBLE SHOOTING DATA page gives the maintenance message
LIQD LVL XMTR/
LIQD LVL SNSR/VSC:
NOTE: This is when the VSC with the P/N 14404-011A, P/N 14404-11B or P/N 1404-010 is installed.
   (8) If the fault continues:
   (9) If the LLT reference line is contaminated,
   (10) If the fault continues:
   (11) If the fault continues:
   (12) If the fault continues:
Subtask 38-31-00-710-091-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 04:34:14 UTC
"WTRUIB" 2025