TM 9-4120-407-14
4-7. LOGIC BOX ASSEMBLY TESTING AND REPLACEMENT. (Cont)
(f) Place S5 in the OFF position. Reset previous fault condition by turning the MODE switch to
OFF RESET position then back to COOL position. Still maintaining TEMPERATURE control
set to COOL position, wait 10 seconds and then place S6 in the ON position. The following
routine shall occur:
1 LED 2 shall turn off and LED 7 shall remain illuminated.
2 For the next 8 seconds: LED 6 illuminates. LED 7 remains illuminated.
3 For the next 2 seconds: LED's 6 and 7 turn off.
4 For the next 2 seconds: LED 6 shall continue to be off. LED 7 shall illuminate.
5 Steps 2 thru 4 shall repeat twice. Then LED 6 illuminates and LED 7 remains illuminated.
End of routine.
(g) Place S6 in the OFF position. Reset by turning the MODE switch to OFF RESET position and
then back to COOL position. Place S4 in the ON position for 2 seconds then place S4 in the
OFF position. The following routine shall occur:
1 LED 2 shall turn off and LED 7 shall remain illuminated.
2 For the next 8 seconds: LED 4 illuminates. LED 7 remains illuminated.
3 For the next 2 seconds: LED's 4 and 7 turn off.
4 LED 7 illuminates for 2 seconds and then turns off for 2 seconds.
5 LED's 2 and 7 shall illuminate. End of routine.
( h ) Place S5 in the ON position for 2 seconds and then place S5 in the OFF position. The
following routine shall occur:
1 LED 2 shall turn off and LED 7 shall remain illuminated.
2 For the next 8 seconds: LED 5 illuminates. LED 7 remains illuminated.
3 For the next 2 seconds: LED's 5 and 7 turn off.
4 LED 7 illuminates for 2 seconds and then turns off for 2 seconds.
5 LED's 2 and 7 shall illuminate. End of routine.
(i) Place S6 in the ON position for 2 seconds and then place S6 in the OFF position. The
following routine shall occur:
1 LED 2 shall turn off and LED 7 shall remain illuminated.
2 For the next 8 seconds: LED 6 illuminates. LED 7 remains illuminated.
3 For the next 2 seconds: LED's 6 and 7 turn off.
4 LED 7 illumina tes for 2 seconds and then turns off for 2 seconds.
5 LED's 2 and 7 shall illuminate. End of routine.
(j) Place S1 in the ON position for 2 seconds and then place S1 in the OFF position. LED's 2 and
7 shall turn off for 10 seconds then LED's 2 and 7 shall illuminate.
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