TM 9-4120-407-14
(3) Vent mode test.
(a) Reset by turning MODE switch to OFF RESET and placing switches S1 thru S6 in the OFF
position. Then turn MODE switch to VENT position. In 2 seconds, LED 7 shall illuminate.
(b) Rotate TEMPERATURE control from WARM to COOL position and back to WARM. LED 7
remains illuminated. Temperature setting should have no effect.
(c) Turn test fixture power off and then back on again. In 2 seconds, LED 7 shall illuminate.
(d) Place S4 in the ON position. The following routine shall occur.
1 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 For the next 2 seconds: LED 4 shall continue to be off. LED 7 shall illuminate.
5 Steps 2 thru 4 shall repeat twice. Then LED 4 illuminates and LED 7 remains illuminated.
End of routine.
(e) Place S4 in the OFF position. Reset previous fault condition by turning the MODE switch to
OFF RESET position and then back to VENT position again. Still maintaining
TEMPERATURE control, set to WARM position, wait 10 seconds and then place S5 in the ON
position. The following routine shall occur:
1 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 For the next 2 seconds: LED 5 shall continue to be off. LED 7 shall illuminate.
5 Steps 2 thru 4 shall repeat twice. Then LED 5 illuminates and LED 7 remains illuminated.
End of routine.
(f) Place S5 in the OFF position. Reset previous fault condition by turning the MODE switch to
OFF RESET position and then back to VENT position again. Still maintaining
TEMPERATURE control set to WARM position, wait 10 seconds and then place S6 in the ON
position. The following routine will occur:
1 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.
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