(d) Check/repair the Panel Assy-Refuel (800VU) internal wiring as follows:
- connector 4023VC, pin <C to terminal block 4001VT, terminal 5C
- terminal block 4001VT, terminal 5D to IND-HI LVL/LEFT (3QJ), terminal 4
- IND-HI LVL/LEFT (3QJ), terminal 5 loop connection to terminals III, II, and I
- IND-HI LVL/LEFT (3QJ), terminal II to terminal block 4001VT, terminal 2A
- terminal block 4001VT, terminal 2B to diode module 4002VD, terminal 3
- diode module 4002VD, terminal 4 to terminal block 4001VT, terminal 4D
- terminal block 4001VT, terminal 4B to SW-TEST/HI/LIGHTS (2QJ), terminal 3A
- SW-TEST/HI/LIGHTS (2QJ), terminal 1A to connector 4024VC, pin
<J.
(e) Install the Panel Assy-Refuel (800VU), (Ref. AMM TASK 28-25-55-400-001).
(f) 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 : ALL ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A253
May 01/05 CES
TASK 28-46-00-810-821
RIGHT HI LVL Indicator Lamp Does Not Come On When TEST Switch Set To LTS
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
1. Possible Causes
_______________
- lamp
- Panel Assy-Refuel (800VU)
- C/B-FUEL/HI/LVL/SPLY (1QJ)
- aircraft wiring
- SWITCH-TEST/HIGH/LTS (2QJ) (part of 800VU)
- diode module (4002VD) (part of 800VU)
- INDICATOR-HI LVL/RIGHT (4QJ) (part of 800VU)
- Panel Assy-Refuel (800VU) internal 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 28-25-55-000-001 Removal of the Refuel Panel 800VU
AMM 28-25-55-400-001 Installation of the Refuel Panel 800VU
AMM 28-46-00-710-001 Test of the Tank High Level Sensing System
AWM 28-46-01
AWM 28-46-02
AWM 28-46-03
3. Fault Confirmation
__________________
A. Do up to and including Para. 3.A. of the Operational Test of the HI LVL Lights (Ref. AMM TASK 28-46-00-710-001).
NOTE : The OPEN DEFUEL/XFR lamp (21QU) should also come on during the
____
time the TEST switch is held at LTS.
The OPEN DEFUEL/XFR indicator lamp (21QU):
- 28VDC supply is from a different C/B
- switched ground/earth uses the same contacts of SWITCH-TEST/HIGH/LTS (2QJ).
「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 A254
May 01/05 CES
4. Fault Isolation
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A. If the RIGHT HI LVL indicator lamp only does not come on and the others do:
- replace the RIGHT HI LVL indicator lamp bulb.
OR
If at least one HI LVL indicator lamp comes on but others do not:
- replace the related lamps.
(1) If the fault continues or if none of the Panel Assy-Refuel (800VU) HI LVL indicator lamps come on:
(a) Remove the Panel Assy-Refuel (800VU) (Ref. AMM TASK 28-25-55-000-001).
(b) Do a check (Ref. AWM 28-46-01), and (Ref. AWM 28-46-02) with a multimeter to see if:
1 28VDC is available at the aircraft connector 4023VC pin <C.
_
2 A ground/earth is available at the aircraft connector 4024VC
_
pin <J.
(2) If 28VDC and the ground/earth is available at the aircraft connectors as specified above:
- replace the Panel Assy-Refuel (800VU), (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 Panel Assy-Refuel (800VU) and internal Trouble-shooting is required, go to Step (8).
(3) If 28VDC is not available in Step (1)(b)1_:
- check/reset/replace the C/B-FUEL/HI/LVL/SPLY (1QJ) at 121VU212.
(4) Do the test given in Para. 3.A.
(5) If the fault continues do a check (Ref. AWM 28-46-01), and (Ref. AWM 28-46-02) of the aircraft wiring: 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 FUEL 燃油4(100)
