ARMY TM 9-4120-380-14
AIR FORCE TO 35E9-136-21
4.30 FAULT RESET SWITCH (S12). This task covers inspection, testing, removal and installation
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Disconnect input power to the air conditioner before performing any maternal
maintenance. Voltages used can KILL. Shutting the unit off at the control panel does not
disconnect unit power.
(1) Disconnect air conditioner input power at source; and
(2) Remove control box assembly (paragraph 4 27).
Check that wire leads are properly connected (see fig FO-2 ).
b. Check that leads are not loose or broken. Tighten loose leads Replace if defective (see fig 4-21).
Check switch for signs of overheating or other visible damage. If wires are damaged, replace as necessary.
a. Using multimeter, check continuity between two switch terminals, then push switch to ON, then OFF ON -
Continuity should be indicated. OFF - Continuity should not be indicated.
If switch fails test, replace switch