(a)  
Set the decade resistance box to 500 ohms.

 S 035-297
 (3)  
Disconnect the electrical connector from low limit valve of the left (right) pack.

 (a)  
Connect 80 ohms resistance to pins 1 and 3 of the electrical connector for the low limit valve.

 (b)  
Connect the DC Voltmeter also to pin 1(-) and pin 3(+) of the electrical connector for the low limit valve.

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 S 715-299
 (4)  Turn the L (R) PACK selector, on the P5 panel, to AUTO. (a) Make sure the voltmeter shows 0 vdc.
 S 715-300
 (5)  Slowly increase the decade box resistance to 1000 ohms. (a) Look at the ECS maintenance page. 1) Make sure the L (R) TEMP VALVE indication, on the EICAS lower display, increases to 0.95 - 1.0. 2) Make sure the L (R) PACK INOP light comes on. (b) Make sure L (R) PACK TEMP shows on the top EICAS display. (c) Make sure the voltmeter shows 8-10 vdc.
 S 715-301
 (6)  Push and hold the L (R) PACK RESET button-light, on the P5 panel, for 3 seconds.
 (a) (b)  Make sure the L (R) PACK INOP light stays on.Make sure L (R) PACK TEMP shows on the top EICAS display.
 S 865-302
 (7)  Turn the L (R) PACK selector, on the P5 panel, to STBY-N.
 S 715-402
 (8)  Push and hold the L (R) PACK RESET button-light, on the P5 panel, for 3 seconds.
 (a) (b) (c)  Make sure the L (R) PACK INOP light goes off.Make sure L (R) PACK TEMP does not show on the top EICAS display.Make sure the L (R) TEMP VALVE indication, on the ECS maintenance page, decreases to less than 0.06.
 S 715-401
 (9)  Decrease the decade box resistance to 500 ohms.
 S 715-304

 (10) Turn the L (R) PACK selector, on the P5 panel, to AUTO.

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MAINTENANCE MANUAL

 S 035-305
 (11)
 Disconnect the decade box from the electrical connector of the No. 1 compressor outlet temperature sensor of the left (right) pack.

 (a)  
Make sure the L (R) PACK INOP light, on the P5 panel, comes on.

 (b)  
Turn the COMPUTER selector, on the forward electrical control stand P9, to L.

 (c)  
Make sure L (R) PACK TEMP shows on the top EICAS display.

 (d)  
Make sure L (R) PACK BITE shows on the bottom EICAS display.

 S 715-306
 (12)
 Turn the COMPUTER selector, on the P9 panel, to R.

 (a)  
Make sure L (R) PACK BITE and L (R) PACK TEMP show on the top EICAS display.

 S 715-307
 (13)
 Turn the L (R) PACK selector, on the P5 panel, to STBY-N.

 (a)  
Make sure the L (R) PACK INOP light goes off.

 (b)  
Make sure L (R) PACK TEMP does not show on the top EICAS display.

 S 715-308
 (14)
 Turn the L (R) PACK selector, on the P5 panel, to AUTO.

 (a)  
Make sure the L (R) PACK INOP light comes on.

 (b)  
Make sure L (R) PACK TEMP shows on the top EICAS display.

 S 435-309
 (15)
 Connect the electrical connector to the No. 1 compressor outlet temperature sensor on the left (right) pack.

 (a)  
Make sure the L (R) PACK INOP light goes off.

 (b)  
Make sure L (R) PACK TEMP does not show on the top EICAS display.

 S 745-310
 (16) Push the VERIFY and the RESET buttons on the face of the left (right) pack temperature controller.
 NOTE: This will erase the failure from the BITE memory.
____
 (a)  Make sure L (R) PACK BITE does not show on the bottom EICAS display.
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