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 TM5-4120-384-14
5-33. COMPRESSOR. -Continued
(10) Check continuity between pins A and B, B and C, and A and
c. There should be continuity between each pair of pins. If there
is no continuity the compressor motor is bad and compressor must be
replaced.
(11) Check continuity between pins A, B, and C and the
If continuity
exists
compressor body. No continuity should exist.
the compressor is bad and must be replaced.
(12) Inspect J10 connector for loose, broken, or otherwise
damaged pins or threaded connections. Replace connector if bad.
b.
Repair/Replace.
(1)
Heater
replacement.
(a) Assuming that power has been disconnected at power
source and covers have been removed during access and testing
proceed as follows:
(b) Compressor must first be removed
from
air
conditioner.
See compressor removal instructions below.
(c)
Remove
screw(s)
and
terminal
box
cover.
(d)
Identify
and
tag
heater
leads.
NOTE
Heater leads connect to J10
pin
F,
and
the
crank-case
heater thermostat switch.
(e)
Disconnect
leads.
(f) (Carrier compressor) Remove heater spring and slide
(Keco compressor) On early models,
heater up over the compressor.
unscrew heater clamp and slide heater up and over compressor.
Later models are equipped with an insertion type heater; using a
small flat tip screwdriver release retainer spring and pull heater
out of cavity.
(g) On Carrier and early Keco model compressors, slide new heater over
L a t e r model Keco compressors have insertion type
c o m p r e s s o r and secure in place.
h e a t e r s . P l a c e heater in cavity and retain with spring clip.
See
and
tags.
(h)
Connect
heater
leads.
(i)
Install
terminal
box
cover
and
secure
with
screw(s).
(j) Install
compressor
unit
in
air
conditioner.
(See
sub
5-33 c.)
5-75
Change 2
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