TM 9-4120-398-14
This task covers
a. Test
b. Replacement
INITIAL SETUP
Power OFF
Tool kit, refrigeration SVC
Condenser access door open
Control board panel removed
System discharged
WARNING
Rags
(Item 12 Appendix E)
Voltages used can kill. Always
Brazing Alloy
disconnect power cord to air conditioner
(Items 2 and 3 Appendix E)
Flux, Brazing
before performing any internal
maintenance. Shutting unit off at its
(Item 6 Appendix E)
control panel does not disconnect
unit power.
(Item 9 Appendix E)
Filter-drier
Refrigerant -22
(Item 8 Appendix E)
a. Test.
(1) Check continuity of high pressure cut-out switch in two bottom leads 7 and 8 of TB1. A reading of
indicates a defective cutout.
(2) Replace defective high pressure cut-out switch.
(1) Tag and disconnect wires near high pressure cut-out switch (1).
(2) Unscrew high pressure cut-out switch brass fitting from refrigeration line.
(3) Remove high pressure cut-out switch (1).