ARMY TM 9-4120-380-14
NAVY EE-000-BA-MMA-010 7053-AC
AIR FORCE TO 35E9-136-21
5.37 COMPRESSOR (B2). - Continued
Heating element can be extremely hot. Severe burns can be caused by touching with
a. Allow crankcase heater (14) to cool before touching
c. c Carefully feel lower part of compressor
If air conditioner has been connected to power source for at least 4 hours, compressor should feel warm (100
If air conditioner has not been connected to power source for at least 4 hours, compressor
temperature should be the same as ambient air temperatures.
Allow compressor to cool before testing
(1) Check continuity between pins C, S. and R and the compressor body There should be no continuity. If
(2) Test single-phase windings (C to S. S to R. and C to R). All resistances should be above zero and less
than 2 ohms.
(3) Compressor containing shorted, open or grounded winding, or open motor protector should be replaced.
If compressor windings are bad, check for compressor burnout prior to Installing a new compressor.
Discharge compressor (paragraph 5.17)
Frontseat (clockwise) both low pressure suction service valve (4) (12-inch extension and 1/4-inch socket
required) and high pressure discharge service valve (17) c lighten both compressor port caps (3) and (19).