Intercell XFR System - Right Valve Shows XX, CFDS (FUEL) Reports R/REAR Valve

TASK 28-15-00-810-826-A
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: EN50020, 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	AR	MULTIMETER - STANDARD

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
ASM 281501
AMM 28-15-51-000-002	Removal of the Actuator
AMM 28-15-51-400-002	Installation of the Actuator

3. Fault Confirmation
Subtask 28-15-00-710-075-A ** ON A/C NOT FOR ALL

A. Do the Operational Test of the Intercell Transfer Valves AMM 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.

4. Fault Isolation
Subtask 28-15-00-810-075-A ** ON A/C NOT FOR ALL

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 Rear Valve, disconnect the electrical connector from the ACTUATOR-TRANSFER VALVE, R REAR SPAR (12QP).

NOTE: During normal Actuator-Transfer Valve, Right Rear Spar (12QP) 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 - STANDARD, at the electrical supply cable connector ASM 281501 to see if:

28VDC is at pin B
0VDC is at pin A.

(2) Open the C/B-FUEL/XFR VALVE 1/WING/L (1QP), A10 at 49VU.
(3) Check with a multimeter, at the electrical supply cable connector ASM 281501 to see if:

28VDC is at pin A
0VDC is at pin B.

(4) Close the C/B-FUEL/XFR VALVE 1/WING/L (1QP), A10 at 49VU.
(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:

G4 - RIGHT REAR ICT VALVE OPEN
H4 - RIGHT REAR ICT VALVE SHUT.

If both of the positions show a 1, check/replace the ACTUATOR-TRANSFER VALVE, R REAR SPAR [12QP] , AMM 28-15-51-000-002, and AMM 28-15-51-400-002.
(7) Do the test given in Para 3.A.
(8) If the fault continues do a wiring check ASM 281501 of the aircraft wiring :

between the pin A, ACTUATOR-TRANSFER VALVE, R REAR SPAR (12QP) and the terminal A3, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP)
between the pin B, ACTUATOR-TRANSFER VALVE, R REAR SPAR (12QP) and the terminal B1, RELAY-L WING TK LOW LEVEL CHANNEL A (5QP)
between the pin C, ACTUATOR-TRANSFER VALVE, R REAR SPAR (12QP) and the pin 13B, connector B, FQIC (3QT)
between the pin D, ACTUATOR-TRANSFER VALVE, R REAR SPAR (12QP) and the pin 14B, 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).

(9) Repair all the unserviceable wiring and connectors.
(10) Do the test given in Para 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:28:32 UTC