(5) Shut down the engines (Ref. AMM TASK 71-00-00-710-028).
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4. Fault Isolation
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**ON A/C 001-049, 051-058, 101-101,
A. If after start of the engine No. 1:
- the PTU starts continuous running and stops after you have switched off and on the YELLOW/ENG 2 PUMP P/BSW:
- replace the SOL VALVE-PTU, G (1012GL) (Ref. AMM TASK 29-23-51-000-001) and (Ref. AMM TASK 29-23-51-400-001).
(1) If the fault continues:
- do the troubleshooting of the continuous running of the PTU (Ref. TASK 29-23-00-810-802).
R **ON A/C 059-099, 102-149, 151-199, 201-299, 301-399, 401-499,
A. If after start of the engine No. 1:
- the PTU starts continuous running and stops after you have switched off and on the YELLOW/ENG 2 PUMP P/BSW:
- replace the MANIFOLD,PTU (1113GM) (Ref. AMM TASK 29-11-15-000-001) and (Ref. AMM TASK 29-11-15-400-001).
(1) If the fault continues:
- do the troubleshooting of the continuous running of the PTU (Ref. TASK 29-23-00-810-802).
**ON A/C ALL
B. Do the fault confirmation procedure as given in Para. 3. to make sure that operation is correct.
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TASK 29-23-00-810-807
Continuous Running of the PTU during Operation of the Cargo-Compartment Doors
1. Possible Causes
_______________
- SOL VALVE-PTU, Y (3012GL)
- wiring
- RELAY CTL (3811GX)
- MANIFOLD, PTU (3015GM)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
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AMM 29-13-15-000-001 Removal of the Power Transfer Unit (PTU) Manifold of the Yellow Hydraulic System AMM 29-13-15-400-001 Installation of the Power Transfer Unit (PTU) Manifold of the Yellow Hydraulic System AMM 29-23-51-000-002 Removal of the Solenoid Valve 3012GL of the Power Transfer Unit AMM 29-23-51-400-002 Installation of the Solenoid Valve 3012GL of the Power Transfer Unit AMM 52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the Yellow Electric Pump AMM 52-30-00-860-002 Close the FWD or AFT Cargo-Compartment Door with the Yellow Electric Pump ASM 29-23/01
3. Fault Confirmation
__________________
A. Do this test:
(1) Make sure that:
- the SW PARK BRK CTL (73GG) is set to OFF,
- the Nose L/G is compressed,
- no towing arm is installed.
(2) Operate the FWD or AFT cargo-compartment door with the Yellow electric pump (Ref. AMM TASK 52-30-00-860-001) and (Ref. AMM TASK 52-30-00-860-002).
(3) Do a check of the PTU for continuous running during the operation of the cargo-compartment door.
(4) Make sure that the the cargo-compartment door is fully opened or closed.
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4. Fault Isolation
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**ON A/C 001-049, 051-058, 101-101,
A. If the PTU runs during the operation of the cargo-compartment door:
NOTE : Make sure that a second person operates one cargo-compartment door
____ during all checks for 28 VDC in the subsequent procedure.
- do a check for 28 VDC between: the SOL VALVE-PTU, Y (3012GL) connector A/A and the connector A/B (Ref. ASM 29-23/01).
(1) If there is 28 VDC:
- replace the SOL VALVE-PTU, Y (3012GL) (Ref. AMM TASK 29-23-51-000-002) and (Ref. AMM TASK 29-23-51-400-002).
(2) If there is no 28 VDC:
- do a check for 28 VDC at the:
- RELAY CTL (3811GX) connector B1 (Ref. ASM 29-23/01).
(a) If there is 28 VDC:
- do a check and repair the wiring between the RELAY CTL (3811GX) connector B1 and the SOL VALVE-PTU, Y (3012GL) connector A/B (Ref. ASM 29-23/01). 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 液压(92)
