(4) Disconnect the fused adaptor 7512VC-B from the receptacle 7512VC.
(5) Do a resistance check of the sensor 22QJ at the tank wall connector 7512VC between pins <B and <C (Ref. AWM 28-46-09). Make sure the resistance is between 330 and 480 ohms. If there is:
- continuity as specified, go to Step (6)
- no continuity as specified (resistance check out of range), go to Step (9).
NOTE : The sensor status (wet or dry) and fuel/air temperature will
____ have an effect on the resistance value.
(6) Replace the FLSCU-2 (9QJ) (Ref. AMM TASK 28-46-34-000-001) and (Ref. AMM TASK 28-46-34-400-001).
(7) If the fault continues:
(a) Get access to the tank wall connector 7512VC (for the center tank harness 18QT) in the right MLG bay (Ref. AMM TASK 32-12-00-010-001).
(b) Disconnect the fused adaptor 7512VC-B from the receptacle 7512VC.
(c) Do a check (Ref. AWM 28-46-09) of the aircraft wiring (sensor input wire - H) between the FLSCU-2 rack connector AB, pin 12A and the fused adaptor 7512VC-B, pin <B.
(d) Do a check (Ref. AWM 28-46-09) of the aircraft wiring (sensor input wire - L) between the FLSCU-2 rack connector AB, pin 12B and the fused adaptor 7512VC-B, pin <C.
(e) If necessary, replace the fused adaptor at 7512VC. NOTE : The connections for the FLSS sensors are through
____ connections and are not fused.
(f) Do a check (Ref. AWM 28-46-06) of the aircraft wiring (FLSCU-2 BITE 2 test command wire) between the FLSCU-2 rack connector AA, pin 15A and the FQIC rack connector AB, pin 8K.
(g) Do a check (Ref. AWM 28-46-09) of the aircraft wiring (FLSCU-2 LS6 output wire) between the FLSCU-2 rack connector AB, pin 2B and the FQIC rack connector AB, pin 11K.
(h) Repair all the unserviceable wiring and connectors (Ref. ESPM 20-00-00).
「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, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A297
201-299, 401-499, Aug 01/05 CES
(i) Install the fused adaptor between the tank wall receptacle 7512VC and the free connector 7512VC-A.
(j) Do the test given in Para. 3.B.
(8) If the fault continues, do a test (Ref. AWM 28-21-07) with a multimeter to see if 28VDC is available at the FLSCU-2 (9QJ) rack connector AA, pin 1D.
(a) If the 28VDC is available:
- go to step (9).
(b) If the 28VDC is not available:
(9) If the fault continues or if there is no continuity in Step (5):
(a) Drain, open and vent the tank (Ref. AMM TASK 28-10-00-910-001) and (Ref. AMM TASK 28-10-00-910-002).
(b) Do a wiring check of the HARNESS-CHAN B, CTR TK (18QT) (Ref. AWM 28-46-09) and replace, if necessary (Ref. AMM TASK 28-42-44-000-001) and (Ref. AMM TASK 28-42-44-400-001).
(c) If the harness is serviceable, replace the SENSOR-LOW LVL, R CTR TK CHANNEL B (22QJ) (Ref. AMM TASK 28-46-15-000-004) and (Ref. AMM TASK 28-46-15-400-012).
1_ Do a check of the aircraft wiring (Ref. AWM 28-21-08) between:
- the FLSCU-2 (9QJ) rack connector AA, pin 1D and the
C/B-32QA.
2_ Repair all the unserviceable wiring and connectors (Ref. ESPM
20-00-00).
3_ Do the test given in Para. 3.B.
「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, ∞∞28-46-00∞∞∞∞∞∞∞∞∞∞Page A298
201-299, 401-499, Aug 01/05 CES
TANK LEVEL SENSING - TASK SUPPORTING DATA
_________________________________________
1. General
_______
The diagrams that follow are to give you an introduction into the Fuel Level
Sensing System (FLSS). This is to help you do the trouble-shooting tasks.
Also included are:
- the Fuel Level Sensors Operating (Changeover) Values
- the Fuel Temperature Level Sensors Operating (Changeover) Values
- the FLSS BITE Inputs to the FQIC (3QT) from the FLSCUs 1 and 2, (7QJ/9QJ).
The FLSS - Physical Layout R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 301)
**ON A/C 301-399,
(Ref. Fig. 301A)
**ON A/C ALL
The FLSS - Overall Block Diagram R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 302)
**ON A/C 301-399,
(Ref. Fig. 302A)
**ON A/C ALL
The High Level Refuel Control Block Diagram 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(118)
