TASK 49-00-00-810-857
APU AUTO SHUTDOWN - LOSS OF DC POWER, DC power supply failure (GTCP 36-300)
1. Possible Causes
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- ECB (59KD)
- Battery Charge Limiter(s) (BCL)
- RELAY - APU MAIN CTL (4KD)
- damage of electrical connections
- aircraft wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 24-38-00-710-001 Operational Test of the Battery Charge Limiter (BCL),
(with the CFDS) AMM 49-00-00-860-003 APU Start by External Power (GTCP 36-300) AMM 49-61-34-000-001 Removal of the Electronic Control Box (ECB) (59KD)
(GTCP 36-300) AMM 49-61-34-400-001 Installation of the Electronic Control Box (ECB)
(59KD) (GTCP 36-300)
ASM 49-61/01
AWM 49-61-01
3. Fault Confirmation
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A. Test/Check
(1) Do the operational test of the Battery Charge Limiter(s) (BCL) (Ref. AMM TASK 24-38-00-710-001).
- if there is a BCL-related maintenance message you can find the related trouble shooting procedure in TSM 24-38-00.
(2) Do the APU start procedure (Ref. AMM TASK 49-00-00-860-003).
(3) On overhead panel 35VU, release the APU GEN p/bsw (OFF legend goes off).
(4) Operate the APU in ECS (1 Pack) mode for at least 10 minutes:
- on overhead panel 30VU, push the
.APU BLEED P/bsw to on,
.PACK 1 p/bsw to on (OFF legend is off).
NOTE : It could happen that NO Fault Confirmation is possible, due to
____ an intermittend character of the fault cause. In this case we recommend to start with step 4.A.(1) of the Fault Isolation.
「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 : 001-003, 051-099, 401-499, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page A296
Config-1 Aug 01/05 CES
4. Fault Isolation
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**ON A/C 001-003, 051-062,
A. If an APU AUTO SHUTDOWN occurs during the APU operation and the APU SHUTDOWNS report gives the maintenance message:
LOSS OF DC POWER
- replace RELAY - APU MAIN CTL (4KD).
(1) If the fault continues:
- do a check for damage of electrical connections which follows: .RELAY - APU MAIN CTL (4KD) pin X1, X2, A1 and X2, .ECB (59KD) connector AC pin 3 and 7, .DIODE 61KD pin 1 and 2 (107VU Contactor Box) (Ref. ASM 49-61/01) and (Ref. AWM 49-61-01).
(a) If the fault continues:
- do a check for short to ground of the aircraft wiring between: C/B 1KD and relay 4KD/A2 C/B 2KD and relay 4KD/X1 relay 4KD/A1 and ECB 59KD-AC/7 (Ref. ASM 49-61/01).
- do a check for continuity of the aircraft wiring between: relay 4KD/X2 and terminal block 1176VT/4 (Ref. AWM 49-61-01).
1 If the fault continues:
_
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-001) and (Ref. AMM TASK 49-61-34-400-001).
R **ON A/C 063-099, 401-499,
A. If an APU AUTO SHUTDOWN occurs during the APU operation and the APU SHUTDOWNS report gives the maintenance message:
LOSS OF DC POWER - POWER SUPPLY INTERRUPT
with LRU TROUBLE SHOOT DATA menu information:
NO LRU FAULT DETECTED
Fault Code Number: 219
or
POWER SUPPLY INTERRUPT
Fault Code Number: 183
- replace RELAY - APU MAIN CTL (4KD).
(1) If the fault continues:
- do a check for damage of electrical connections which follows: .RELAY - APU MAIN CTL (4KD) pin X1, X2, A1 and X2, .ECB (59KD) connector AC pin 3 and 7, .DIODE 61KD pin 1 and 2 (107VU Contactor Box) (Ref. ASM 49-61/01) and (Ref. AWM 49-61-01).
(a) If the fault continues:
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 機載輔助動力 1(72)
