- repair the above wiring.
(b) If there is continuity:
- do a check of the wiring of the ground signal at the engine 2 FDU pin B/B (Ref. ASM 26-12/01).
1 If there is no continuity:
_ - repair the above wiring.
2 If there is continuity:
_ - replace the C/B-ENGINE/2/FIRE DET/LOOP B (8WD2).
R **ON A/C 106-149, 155-199, 208-299, 301-399, 401-499,
B. If the circuit breaker 8WD2 is closed, and if the test gives the maintenance message CHECK FDU ENG 2 CHAN B SUPPLY:
- do a check for 28VDC at the pin B/A of the engine 2 FDU.
(1) If there is 28VDC:
- replace the FDU-ENG2 (2WD2) (Ref. AMM TASK 26-12-34-000-001) and (Ref. AMM TASK 26-12-34-400-001).
(2) If there is no 28VDC:
- do a check of the wiring of the 28VDC signal from the circuit breaker 8WD2 to the engine 2 FDU (Ref. ASM 26-12/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- do a check of the wiring of the ground signal at the engine 2 FDU pin B/B (Ref. ASM 26-12/01).
1 If there is no continuity:
_ - repair the above wiring.
2 If there is continuity:
_
- replace the C/B-ENGINE/2/FIRE DET/LOOP B (8WD2).
**ON A/C ALL
C. If the circuit breaker (8WD2) is open:
- close it.
(1) If the circuit breaker trips:
- disconnect the three units below:
FDU-ENG2 (2WD2)
ENG/APU FIRE PNL (1WD)
BOARD-ANN LT TEST & INTFC (5LP)
- close the circuit breaker.
(a) If the circuit breaker stays closed:
- connect the units one by one until the circuit breaker trips
- replace the defective unit: . for LRU 2WD2: (Ref. AMM TASK 26-12-34-000-001) and (Ref. AMM TASK 26-12-34-400-001) . for LRU 1WD: (Ref. AMM TASK 26-12-12-000-001) and (Ref. AMM TASK 26-12-12-400-001) . for LRU 5LP: (Ref. AMM TASK 33-14-33-000-001) and (Ref. AMM TASK 33-14-33-400-001).
(b) If the circuit breaker trips again:
- do a check for a short to ground between the circuit breaker (7WD2) and the three units (2WD2, 1WD, 5LP) (Ref. ASM 26-12/01).
1 If there is a short to ground:
_ - repair the defective wiring.
2 If there is no short to ground:
_
- replace the C/B-ENGINE/2/FIRE DET/LOOP B (8WD2).
(2) Connect all the units.
「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 : ALL ∞∞26-12-00∞∞∞∞∞∞∞∞∞∞Page 267
Feb 01/04R CES
D. Do the test given in Para. 3.
「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 : ALL ∞∞26-12-00∞∞∞∞∞∞∞∞∞∞Page 268
Feb 01/04R
CES Loss of the FIRE TEST (LOOP A) Discrete Input from the Engine 1 FDU
1. Possible Causes
_______________
- ENG/APU FIRE PNL (1WD)
- wiring of the 28VDC signal from the circuit breaker (7WD1) to the ENG/APU FIRE panel (1WD)
- wiring of the FIRE TEST (LOOP A) discrete from the engine 1 FDU (2WD1) to the ENG/APU FIRE panel (1WD)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R AMM 26-12-00-710-001 Operational Check of Loop/Squib AMM 26-12-12-000-001 Removal of the ENG/APU Fire Panel (1WD) AMM 26-12-12-400-001 Installation of the ENG/APU Fire Panel (1WD) ASM 26-12/02
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the engine fire and overheat detection (loop/squib) (Ref. AMM TASK 26-12-00-710-001).
4. Fault Isolation
_______________
A. If the ENG 1 FIRE indication does not come into view on the upper ECAM DU and if the FIRE legend of the ENG 1 annunciator does not come on on the ENG panel 115VU:
- do a check to see if the DISCH legend of the ENG 1/AGENT 1 pushbutton switch on the ENG/APU FIRE panel (1WD) comes on during the fire test.
(1) If the DISCH legend does not come on:
- replace the ENG/APU FIRE PNL (1WD) (Ref. AMM TASK 26-12-12-000-001) and (Ref. AMM TASK 26-12-12-400-001).
(a) If the fault continues:
- do a check and repair the wiring of the 28VDC signal from the circuit breaker (7WD1) to the ENG/APU FIRE panel (1WD), pin A/M (Ref. ASM 26-12/02).
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 FIRE PROTECTION 防火(52)
