4. Procedure
_________ Subtask 49-00-00-710-057-A
 A. Operational Test of the APU WARNING : MAKE SURE THAT THE FWD AVIONICS ACCESS DOOR 811 IS OPEN. WITH A
_______ WARNING PLACARD ATTACHED TO IT. THE WARNING NOTICE MUST TELL PERSONS NOT TO CLOSE THE DOOR. THIS PREVENTS ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT.
 CAUTION : DO NOT USE THE APU DURING FLUID DE-ICING OPERATIONS. DE-ICING
_______
 FLUID CAN CONTAMINATE THE INSIDE OF THE APU.

 CAUTION : DO NOT TRY TO START THE APU A FOURTH TIME UNTIL THE STARTER
_______ MOTOR IS COOL (60 MINUTES MINIMUM). WE RECOMMEND THAT YOU TRY TO START THE APU THREE TIMES, WITH AN INTERVAL OF ONE MINUTE BETWEEN EACH TIME THAT YOU TRY.
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the panel 35VU:
-push the BAT1 and BAT2 pushbutton switches in the AUTO position.
2. On the panel 11VU:
-push the BLEED pushbutton
switch on the ECAM panel.

 3. On the panel 30VU:
-push the APU BLEED pushbutton switch to the OFF position.
4. On the panel 30VU:
-set the APU X BLEED switch to the AUTO position.
5. On the panel 40VU:
-push the fuel X FEED pushbutton switch to the CLOSED position.
6. On the panel 11VU:
-push the APU pushbutton switch on the ECAM panel.
On the panel 35VU:
-DC V battery indicators show eachbattery voltage (28V maximum, 21Vminimum).
On the ECAM panel display:
-
the BLEED system page comes on.

On the panel 30VU:

-
the ON legend in the APU BLEEDpushbutton switch goes off.

On the lower ECAM display:

-
the X BLEED valve is in the closedposition.

On the panel 40VU:

-
the ON legend in the fuel X FEEDpushbutton switch goes off.

On the ECAM panel display:
-APU systems page comes on.

 -------------------------------------------------------------------------------
ACTION RESULT -------------------------------------------------------------------------------
7. On the panel 25VU:
-push the APU MASTER SW pushbutton switch to the ON position.
8. On the panel 25VU:
-push the APU START pushbutton switch to the ON position.
9. On the lower ECAM display:
-check at 7% N.
-monitor the acceleration.
-check at 100% N.
10. On the panel 35VU: On the panel 25VU:
-the ON legend in the APU MASTER SW
comes on.NOTE: The MASTER SW FAULT legend could come on if the Battery Charge Limiter does a power-up test after A/C power loss. Wait 45 seconds, recycle the APU MASTER SW then continue with the start sequence.
 NOTE : Wait 5 seconds for APU Power-up
____ and watch states completion.
On the panel 25VU:
-the ON legend in the APU STARTpushbutton switch comes on.
 On the lower ECAM display:
 -N indication increases.
On the lower ECAM display:
-N% indication increases.
 -EGT increases.
-continuous increase of EGT and N indications.
On the panel 25VU:
 -
the ON legend in the START pushbutton switch is off.

 -
the AVAIL legend in the START pushbutton switch is on.

 On the lower ECAM display:
 -AVAIL indication is on.
 -EGT in limits.
 -N indication shows 100% N.
 -APU GEN (amber) OFF (white) indication is on.
 -the APU bleed valve symbol is in closed position.
On the panel 35VU:

 -------------------------------------------------------------------------------
ACTION RESULT -------------------------------------------------------------------------------
-push the APU GEN pushbutton
switch to the ON position.

11. On the panel 30VU:
-push the APU BLEED pushbutton switch to the ON position.
12. On the panel 30VU:
-push the PACK1 and PACK2 pushbutton switches to the ON position.
 On the panel 35VU:
-push the APU GEN pushbutton switch to the OFF position.
13. On the panel 30VU:
-
the APU GEN pushbutton switch OFFlegend goes off.

 On the lower ECAM display:

 -
the generator load, voltage and frequency indications are in the specified limits (no amber or red indications).

On the panel 30VU:

-
the APU BLEED pushbutton switch ONlegend comes on.

 On the lower ECAM display:
 -momentarily there is a small increase in EGT.
 -
the APU bleed valve symbol is in open position.

 -
the APU bleed pressure indication shows that the bleed pressure has increased.

On the panel 30VU:

-
the OFF legends in the PACK1 andPACK2 pushbutton switches go off.
　
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