ARMY TM 9-4120-380-14
NAVY EE-000-BA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-21
4.51
CONDENSER MOTOR(B3). This task covers inspection, testing, removal and installation.
INITIAL SETUP
Tools:
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Crimping tool (pig tail) (Item 10, Appendix B)
Personnel. 1
Materials:
Corrosion inhibiting compound (Item 12, Appendix E)
Rags (Item 7, Appendix E)
Varnish, moisture and fungus resistant (Item 11, Appendix E)
Equipment Conditions:
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
(2) Remove condenser fan section panel (paragraph 4.23)
INSPECTION
a. Check motor (1) for rotational freedom by spinning shaft (2) If there is any stiffness or binding, contact Direct
Support Maintenance (see fig. 4-41)
b. Check motor bearings for shaft end play. If there is excessive end play, contact Direct Support Maintenance.
TESTING
a. Using multimeter, check continuity between wires 1 and 2, 1 and 3, and 2 and 3. Replace motor if there is no
continuity between any pair of wires Motor winding is open.
b. Using multimeter, set on high OHMS scale, test stator insulation between each wire (1, 2, and 3) and motor
housing. A reading of less than 500,000 ohms indicates insulation failure. Replace motor.
REMOVAL
a. Remove condenser motor and housing assembly (paragraph 4.49).
b. Remove condenser fan and housing assembly (paragraph 4.50).
c. Remove motor (1).
4-110
