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ARMY TM 9-4120-381-14
NAVY EE-000- CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-51.
FAN CONTACTORS ( K8 AND K9).
This task consists of: Inspection
Testing
Removal
Repair/ Replace
Installation
INITIAL SETUP:
Tools
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Personnel: 1
Materials:
Varnish, moisture and fungus resistant (Item 16, Appendix)
Equipment Conditions:
WARNING
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.
2.
Remove center front evaporator panel (para 4-22).
3.
Open left electric plate (para 4-30).
INSPECTION
Inspect contactor for cracks, corrosion, loose electrical connections, and loose mounting hardware. Replace contactor
if cracked, broken, or badly corroded (see Figure 4-54).
TESTING
1.
Tag and disconnect wires from thermal overload.
2.
Using multimeter, test for continuity across each individual overload element. If no continuity is indicated, replace
element.
3.
Using multimeter, check continuity between input terminal of thermal overload and contactor output terminal while
pressing reset bar. If continuity is not indicated, replace contactor assembly.
4.
Using multimeter, measure continuity across contactor coil with one wire disconnected from coil terminal. If meter
does not read 60 - 10 ohms, replace contactor.
5.
Reconnect coil wire and tag wires.
REMOVAL
1.
Tag and disconnect leads.
2.
Remove four screws (4), locknuts (6), eight flat washers (5).
3.
Remove contactor assembly (3).
4-95
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