TM 9-4120-402-14
5-8. LOGIC BOX ASSEMBLY (LGC1). - continued
(d) Rotate TEMPERATURE control towards WARM until LED 1 illuminates again. Place S3 in the ON position
(contacts open). This step should have no effect on operation. LEDs 1 and 7 shall remain illuminated.
(e) Rotate AMBIENT control to COOL position and place S3 in the OFF position. Place S1 in the ON position.
LEDs 1 and 7 shall turn off and in 10 seconds LED 3 shall illuminate.
(f)
Reset logic by turning rotary MODE switch to OFF/RESET position. Place S1 in the OFF position. Move
TEMPERATURE control to WARM position. Set MODE switch to HEAT. LEDs 1 and 7 shall illuminate
following a 2-second delay.
(g) Place S1 in the ON position for 2 seconds then place S1 in the OFF position. LEDs 1 and 7 shall turn off for
10 seconds then shall illuminate.
(h) Place S2 in the ON position for 2 seconds then turn S2 OFF again. LED 1 shall turn off. After 10 seconds
LED 7 shall turn off for 2 seconds. Then both LEDs turn on again.
(i)
Place S2 in the ON position. LED 1 shall turn off and LED 7 shall remain illuminated. LED 3 shall illuminate
after 10 seconds.
(j)
Reset Logic by turning rotary MODE switch to OFF/RESET position. Place S2 in the OFF position. Maintain
TEMPERATURE control in WARM position. Set MODE switch to HEAT. LEDs 1 and 7 shall illuminate after a
2-second delay.
(k) Place S4 in the ON position. The following routine shall occur:
1
LED 1 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: LEDs 4 and 7 turn off.
4
For the next 2 seconds: LED 4 shall continue to be off. LED 7 shall illuminate.
(l)
Steps 2 through 4 shall repeat twice. Then LED 4 illuminates and LED 7 remains illuminated. End of routine.
(m) Place S4 in the OFF position. Reset previous fault condition by turning the MODE switch to OFF/RESET
position and then back to HEAT position again. Still maintaining TEMPERATURE control to WARM position
wait 10 seconds and place S5 in the ON position. The following routine shall occur:
1
LED 1 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: LEDs 5 and 7 turn off.
4
For the next 2 seconds: LED 5 shall continue to be off. LED 7 shall illuminate.
(n) Steps 2 through 4 shall repeat twice. Then LED 5 illuminates and LED 7 remains illuminated. End of routine.
5-15
