R (991WRx) to locate the fault.
R (b) If there is no continuity, replace the applicable OXYGEN CYLINDER
R ASSEMBLY (Ref. AMM TASK 35-21-51-000-001) and (Ref. AMM TASK 35-R 21-51-400-001).
R (c) Do the functional check of oxygen cylinders and pressure reducers
R (Ref. AMM TASK 35-21-00-750-001).
「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 : 401-499, ∞∞35-23-00∞∞∞∞∞∞∞∞∞∞Page 222
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R (3) If the fault continues:
R (a) Disconnect all electrical connectors from the oxygen cylinder.
R (b) Do a check and repair the aircraft wiring between:
R - The POXIP connector A pin N and connector 6954VC1 pin C
R - Each connector 6954VCx pin A and the next connector 6954VCx pin
R C (Ref. ASM 35-23/00).
R (4) If the self-test of the POXIP is not successful:
R - Replace the POXIP 940WR.
R B. Make sure that the CYLINDER FAULT light does not come on.
R 5. Close-up________
R A. Put the aircraft back to its initial configuration.
R QCCU, Pressure Transducer and/or Temperature Transducer Failure R 1. Possible Causes
_______________
R - Pressure Reducers 990WR1 thru 990WR6
R - aircraft wiring
R - TEMPERATURE TRANSDUCER (975WR)
R - QCCU (960WR)
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 35-23-11-000-001 R AMM 35-23-11-400-001 R AMM 35-23-34-000-001 R R AMM 35-23-34-400-001 R R AMM 35-23-51-000-001 R AMM 35-23-51-400-001
R 3. Fault Confirmation
__________________
Removal of the Temperature Transducer (975WR)
Installation of the Temperature Transducer (975WR)
Removal of the Quantity Calculation and Control Unit
(QCCU) (960WR)
Installation of the Quantity Calculation and Control
Unit (QCCU) (960WR)
Removal of the Pressure Reducer (990WR1-990WR6)
Installation of the Pressure Reducer (990WR1-990WR6)
R A. Do a reset of the Quantity Calculation and Control Unit (QCCU) 960WR: R - Press the TEST button once for approx. 1 second.
R 4. Fault Isolation
_______________ R A. If the light(s) on the QCCU come on again: R (1) If the PRESSURE light comes on:
R - Do the fault isolation procedure of the Pressure Reducers 990WR1
R thru 990WR6:
R (a) Turn the NUMBER OXYGEN CYLINDER selector on the QCCU to 1.
R (b) Isolate the unserviceable reducer(s).
R NOTE : When the PRESSURE light comes on, the pressure transducer
____
R of the applicable pressure reducer is unserviceable.
R 1_ Open the circuit breaker 901WR.
R 2_ Disconnect all of the electrical connectors from the pressure
R reducers.
「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 : 401-499, ∞∞35-23-00∞∞∞∞∞∞∞∞∞∞Page 224
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R 3 Connect the pressure reducer 990WR1 to the QCCU._
R 4 Close the circuit breaker 901WR._
R 5 Check the PRESSURE light on the QCCU._
R a If the PRESSURE light comes on:_
R - Replace the unserviceable pressure reducer (Ref. AMM TASK
R 35-23-51-000-001) (Ref. AMM TASK 35-23-51-400-001).
R b If the PRESSURE light does not come on: - Repeat the test_
R for the pressure reducers 990WR2 thru 990WR6.
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