(1) If the fault continues:
- do a check and repair the wiring between the: BOARD-ANN LT TEST & INTFC (20LP) pin A/37 and the P/BSW-HYD/PTU (1802GL) pin A/7 (Ref. ASM 33-14/22).
B. Do the operational test of the annunciator light test system (Ref. AMM TASK 33-14-00-710-001) to make sure that the operation is correct.
5. Close-up
________
A. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
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Feb 01/03R
CES R TASK 29-23-00-810-809
R Unwanted Operation of the Power Transfer Unit (PTU) during the Start of the R Engines
R 1. Possible Causes
_______________
R - RELAY-ENG/MASTER 1 (11QG)
R - RELAY-ENG/MASTER 2 (12QG)
R - HYDRAULIC/SOL VALVES/G/Y/PTU (1801GL)
R - RELAY-LDG CTL (1805GL)
R - RELAY-N/W STRG DE-ACT (1806GL)
R - RELAY-PARK BRAKE CTL (1804GL)
R - wiring
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R 29-23-00-810-801 R AMM 24-41-00-861-002 R R AMM 24-41-00-862-002 R R AMM 29-23-00-710-002 R AMM 29-23-00-710-003 R AMM 29-23-00-860-002 R R AMM 31-60-00-860-001 R AMM 71-00-00-710-004 R AMM 71-00-00-710-028 R ASM 29-23/01
R 3. Fault Confirmation
__________________ Fault of the Power Transfer Unit (PTU) Energize the Aircraft Electrical Circuits from the External Power De-energize the Aircraft Electrical Circuits Supplied from the External Power Operational Check of PTU Green to Yellow Operational Check of PTU Yellow to Green Connection of the Isolation Coupling of the Power Transfer Unit (PTU) EIS Start Procedure Engine Manual Start Engine Shutdown
R A. Aircraft Maintenance Configuration
R (1) Energize the aircraft electrical circuits R (Ref. AMM TASK 24-41-00-861-002).
R (2) Make sure that the PTU P/BSW is in the AUTO position (OFF light not R on).
R (3) Make sure that the cargo compartment doors are not in operation with R the Yellow electric hydraulic pump.
R (4) Make sure that the isolation coupling of the PTU is connected (Ref. R AMM TASK 29-23-00-860-002).
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May 01/04 CES
R (5) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) R (Ref. AMM TASK 31-60-00-860-001).
R (6) Do the manual start of the engines (Ref. AMM TASK 71-00-00-710-004).
R NOTE : The HYD PTU FAULT message may come on at the upper ECAM DU if
____ R you do an engine start within 30 sec of an operation of the R cargo doors (with the Yellow electric pump).
R (7) Do a check for unwanted operation of the PTU during the engine start.
R NOTE : The PTU operation is usually prevented during the engine start
____ R when: R - one of the two engine master switches is set to ON R and R - the parking brake is set to ON, or the nose wheel steering R system is deactivated R and R - the aircraft is on the ground (the nose landing gear is R compressed).
R (8) Shutdown the engines (Ref. AMM TASK 71-00-00-710-028).
R (9) De-energize the aircraft electrical circuits R (Ref. AMM TASK 24-41-00-862-002).
R 4. Fault Isolation
_______________
R A. If there is an unwanted operation of the PTU during the engine start, do
R the subsequent troubleshooting procedure:
R (1) Do the operational tests of the PTU (Ref. AMM TASK 29-23-00-710-002)
R and (Ref. AMM TASK 29-23-00-710-003).
R (a) If the operation of the PTU is not correct, do the
R troubleshooting of the PTU (Ref. TASK 29-23-00-810-801).
R (b) If the operation of the PTU is correct, find the applicable
R troubleshooting procedure in the subsequent steps.
R (2) If at the start of the first engine, the PTU starts and stops at the
R start of the second engine, then replace:
R - the RELAY-ENG/MASTER 1 (11QG), if the first engine started was the
R engine 1 (Ref. ASM 29-23/01)
R or
R - the RELAY-ENG/MASTER 2 (12QG), if the first engine started was the
R engine 2 (Ref. ASM 29-23/01).
「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 ∞∞29-23-00∞∞∞∞∞∞∞∞∞∞Page 227 中國航空網(wǎng) www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 液壓(94)
