TM9-4120-370-14
TO35E9-229-1
4-60. EVAPORATOR FAN MOTORS (B3 AND 64) - Continued.
Disconnect motor cable connector,
Z
Use a Multimeter set on lowest OHMS scale to check continuity between A and B, A and C, and B and C in
connector. If there is no continuity between any pair of pins, the motor winding is open, Replace motor,
Use a Multimeter set on lowest OHMS scale to check for continuity between each pin in connector (A. B , and
-
C) and the motor housing. It there is continuity between any pin and motor housing, the motor winding is shorted,
--.
Replace motor.
Z
Use a Multimeter set on high OHMS scale to test stator insulation by checking between each pin in connector
(A, B, and C) and motor housing. A reading of less than 500,000 ohms indicates insulation failure, Replace mo-
tor.
NOTE
If all the above inspections and tests are satisfactory, but the motor will still not operate
properly, notify direct support maintenance, who may desire to make further tests before
it is removed,
Removal
b.
(1) Check to see that power has been disconnected,
(2) Disconnect motor cable connector
(3) Using screwdriver and wrench, remove clamp, screw, and nut from motor cable,
(4) Support or hold motor and fan assembly as hardware is removed.