ARMY TM 9-4120-380-14
AIR FORCE TO 35E9-136-21
4.36 FAUIT RELAYS (K7-K10). This task covers removal, inspection, testing and installation.
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Varnish, moisture and fungus resistant (Item 11, Appendix E)
Disconnect input power to the air conditioner before performing any internal
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
Pull relay (1) from socket (2) (see fig 4-27)
Check for loose, corroded, missing or broken pins.
Check relay for cracks, signs of overheating and other visible damage Replace if damaged
Use multimeter to check continuity between the following pins. If relay condition is incorrect, replace relay.
(Coil) 2000 + 200 ohms
a. Fungus proof relay per MIL-V-173
b. Plug relay (1) into socket (2).