- between the FLSCU-1 rack connector AA, pin 6A and the DC1 ground/earth point
- between the FLSCU-1 rack connector AB, pin 10A and the tank wall connector 4039VC, pin <V
- between the FLSCU-1 rack connector AB, pin 10B and the tank wall connector 4039VC, pin EE.
(9) Repair all the unserviceable wiring and connectors.
(10) Do the test given in Para. 3.A.
(11) If the fault continues:
(a) Drain, open and vent the tank (Ref. AMM TASK 28-10-00-910-001).
(b) Do a check of the HARNESS-CHAN A, L WING TK INR (13QT1) (Ref. AWM 28-46-02).
(c) If the harness is unserviceable:
- replace the harness (Ref. AMM TASK 28-42-43-000-006) and (Ref. AMM TASK 28-42-43-400-006).
(d) If the harness is serviceable:
- replace the SENSOR-HI LEVEL, LEFT WING TANK INNER CHANNEL A (17QJ1) (Ref. AMM TASK 28-46-15-000-001) and (Ref. AMM TASK 28-46-15-400-009).
(12) CTL PNL-REFUEL/DEFUEL internal trouble-shooting (Ref. AWM 28-46-01) and (Ref. AWM 28-46-02):
(a) Check/replace the SW-TEST/LTS/HIGH (2QJ) (part of 800VU).
(b) Check/repair the CTL PNL-REFUEL/DEFUEL internal wiring as follows:
- connector 4023VC, pin <C to terminal block 4001VT, terminal 5C
- terminal block 4001VT, terminal 5J to SW-TEST/HI/LTS (2QJ), terminal 1B
- SW-TEST/HI/LTS (2QJ), terminal 3B to connector 4024VC, pin R
- connector 4024VC, pin T to IND-HI LVL/LEFT (3QJ), terminal I.
(c) Install the CTL PNL-REFUEL/DEFUEL (800VU), (Ref. AMM TASK 28-25-55-400-001).
(d) Do the test given in Para. 3.A.
**ON A/C 301-399,
A. If the LEFT HI LVL Indicator light fails to change state, from off to on, or from on to off:
- swap the FLSCU-1 (7QJ) with FLSCU-2 (9QJ), (Ref. AMM TASK 28-46-34-000-001), and (Ref. AMM TASK 28-46-34-400-001).
「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 : ALL ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A263
May 01/05 CES
(1) Do the test given in Para. 3.A.
(2) If the LEFT HI LVL Indicator light changes state during the test but the fault has transfered to RIGHT HI LVL Indicator light:
- replace the FLSCU-2 (9QJ) (Ref. AMM TASK 28-46-34-000-001) and (Ref. AMM TASK 28-46-34-400-001).
(3) Do the test given in Para. 3.A.
(4) If the fault continues:
(5) Remove CTL PNL-REFUEL/DEFUEL (800VU) (Ref. AMM TASK 28-25-55-000-001).
(6) Do a check (Ref. AWM 28-46-02) with a multimeter of the SW-TEST/HI/LTS (2QJ) between:
- connector 4023VC, pin <C, and connector 4024VC, pin R, on the CTL
PNL-REFUEL/ DEFUEL (800VU). The multimeter must show: - open circuit for the switch in the central (released) position
- closed circuit for the switch in the TEST position.
NOTE : The LTS test checks the 28VDC supply to the CTL
____
PNL-REFUEL/DEFUEL (800VU).
(7) Replace the CTL PNL-REFUEL/DEFUEL (800VU), if it fails Step (6), (Ref. AMM TASK 28-25-55-000-001), and (Ref. AMM TASK 28-25-55-400-001).
NOTE : If due to airline operational conditions it is not possible to
____ replace the CTL PNL-REFUEL/DEFUEL (800VU) and internal touble-shooting is required, go to Step (12).
(8) If the fault continues do a check (Ref. AWM 28-46-01), and (Ref. AWM 28-46-02) of the aircraft wiring
- between the CTL PNL-REFUEL/DEFUEL (800VU), connector 4024VC, pin R and the FLSCU-1 rack connector AA, pin 13B
- between the CTL PNL-REFUEL/DEFUEL (800VU), connector 4024VC, pin T and the FLSCU-1 rack connector AA, pin 7A
- between the FLSCU-1 rack connector AA, pin 6A and the DC1 ground/earth point
- between the FLSCU-1 rack connector AB, pin 10A and the tank wall connector 4039VC, pin <V
- between the FLSCU-1 rack connector AB, pin 10B and the tank wall connector 4039VC, pin EE.
(9) Repair all the unserviceable wiring and connectors.
(10) Do the test given in Para. 3.A.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 301-399, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A264
May 01/05R CES
(11) If the fault continues:
(a) Drain, open and vent the tank (Ref. AMM TASK 28-10-00-910-001).
(b) Do a check of the TANK HARNESS GROUP A (57QT) (Ref. AWM 28-46-02).
(c) If the harness is unserviceable:
- replace the harness (Ref. AMM TASK 28-42-43-000-005) and (Ref. AMM TASK 28-42-43-400-005). 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 FUEL 燃油4(104)
