4. Fault Isolation
_______________
A. If the Right Intercell Transfer Valve continues to show XX on the FUEL System Display (lower ECAM DU), and the CFDS(FUEL) reports the Right Forward Valve, disconnect the electrical connector, from the ACTUATOR-TRANSFER VALVE, R FWD SPAR (10QP).
NOTE : During normal Actuator-Transfer Valve, Right Forward Spar (10QP)
____ operation, 28VDC is supplied to the electrical connector: - on the pin A for OPEN - on the pin B for SHUT.
(1) Check with a multimeter, at the electrical supply cable connector (Ref. ASM 28-15/02) to see if:
- 28VDC is at pin B
- 0VDC is at pin A.
(2) Open the C/B-FUEL/XFR VALVE 2/WING/L (3QP), M22 at 121VU.
(3) Check with a multimeter, at the electrical supply cable connector (Ref. ASM 28-15/02) to see if:
- 28VDC is at pin A
- 0VDC is at pin B.
(4) Close the C/B-FUEL/XFR VALVE 2/WING/L (3QP), M22 at 121VU.
(5) If the voltages at pins A and B of the connector are correct, (as in
(1) and (3) above), reconnect the electrical connector to the actuator.
(6) On the CFDS(FUEL) Input Parameters Page 3, examine the bit postions:
- C4 - RIGHT FWD ICT VALVE OPEN
- D4 - RIGHT FWD ICT VALVE SHUT.
If both of the positions show a 1, check/replace the
ACTUATOR-TRANSFER VALVE, R FWD SPAR (10QP), (Ref. AMM TASK 28-15-51-000-001), and (Ref. AMM TASK 28-15-51-400-001).
(7) Do the test given in Para 3.A.
(8) If the fault continues do a wiring check (Ref. ASM 28-15/02) of the aircraft wiring:
- between the pin A, ACTUATOR-TRANSFER VALVE, R FWD SPAR (10QP) and the terminal A3, RELAY-R WING TK LOW LEVEL CHANNEL A (8QP)
- between the pin B, ACTUATOR-TRANSFER VALVE, R FWD SPAR (10QP) and the terminal B1, RELAY-L WING TK LOW LEVEL CHANNEL B (7QP)
- between the pin C, ACTUATOR-TRANSFER VALVE, R FWD SPAR (10QP) and the pin 7E, connector B, FQIC (3QT)
- between the pin D, ACTUATOR-TRANSFER VALVE, R FWD SPAR (10QP) and the pin 8E, connector B, FQIC (3QT).
NOTE : In the above wiring checks it is important to test for short
____ circuits between the lines mentioned (pole to each pole).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-15-00∞∞∞∞∞∞∞∞∞∞Page 289
201-299, 401-499, Aug 01/05 CES
(9) Repair all the unserviceable wiring and connectors.
(10) Do the test given in Para 3.A.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-15-00∞∞∞∞∞∞∞∞∞∞Page 290
201-299, 401-499, Aug 01/05 CES
TASK 28-15-00-810-826
Intercell XFR System - Right Valve Shows XX, CFDS (FUEL) Reports R/REAR Valve
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
_______ EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT, E.G. EN50-020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.
1. Possible Causes
_______________
- ACTUATOR-TRANSFER VALVE, R REAR SPAR (12QP)
- aircraft wiring
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 28-15-00-710-002 Operational Check of Individual Transfer Valves to
Ensure Valve Shaft Rotates Valve to Open Position AMM 28-15-51-000-002 Removal of the Actuator 11QP(12QP) AMM 28-15-51-400-002 Installation of the Actuator 11QP(12QP) ASM 28-15/01
3. Fault Confirmation
__________________
A. Do the Operational Test of the Intercell Transfer Valves (Ref. AMM TASK 28-15-00-710-002).
NOTE : The intercell transfer valves (ICTVs) are motor driven and the
____ power for these circuits is derived from the main power. The ICTVs are immobilized on battery power.
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