ARMY TM 9-4120-380-14
AIR FORCE TO 35E9-136-21
SOLENOID VALVES (L1 AND L2) COIL. This task covers inspection, testing and replace.
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Varnish, moisture and fungus resistant (Item 11, Appendix E)
Disconnect mput power to the air conditioner before performing any internal
maintenance Voltages used can KILL. Shutting the umt off at the control panel does not
disconnect unit power.
(1) Disconnect air conditioner input power at source;
a. Check that leads are properly connected (see fig. 4-48 and fig. FO-2.).
b. Check coil for signs of overheating or other obvious damage. Replace coil if damaged.
a. Check to be sure power has been disconnected.
b. Tag and disconnect wires from coil.
c. Use multimeter set on lowest OHMS scale to check for continuity between the coil wires If continuity is not found,
coil is open and must be replaced.
d. Use multimeter to check for continuity between each wire and coil casing If continuity is found between either
wire and case, the coil is grounded and should be replaced.
e. If continuity checks are satisfactory, apply 120 volt AC from an external power supply across coil wires and listen
for a sharp click when the valve changes position. If a click is not heard, internal valve problems are indicated
and entire valve should be replaced Contact Direct Support Maintenance for further action.