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Page Title:
PRESSURE SWITCHES. (Cont) |
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 TM5-4120-384-14
5-27.
PRESSURE
SWITCHES.-Continued
(2) Press reset button on the switch. Use a continuity
tester or multimeter to check for continuity between terminals 1
and 2 on each switch.
If there is continuity the switch is
properly closed. If no continuity is found on either switch, press
If there is
and release the reset button again on that switch.
s t i l l n o c o n t i n u i t y that switch must be replaced.
Assuming that steps a. (1), (2),
c.
Removal.
and
(3)
and
b.
(1) above have been done proceed as follows.
(1) Discharge
and
purge
refrigeration
system
per
and 5-12.
(2) If HIGH PRESSURE switch is to be replaced, remove
conditioned air supply louver (para 4-14) for access to mounting
screws.
(3) Disconnect
flare
nut
at
end
of
capillary
line
from
switch
to
be replaced.
(4) Remove
two
screws
and
lock
washers
from
switch
to
be
replaced.
(5)
Carefully
remove
switch
and
capillary
line.
Replace
pressure
switch
found
defective
during
d.
Replace.
inspection or test.
e.
Installation.
(1)
Insert
capillary
line
through
grommeted
hole
in
bulkhead.
(2)
Connect
flare
nut.
(3)
Secure
switch
with
two
screws
and
lock
washers.
(4) Carefully
coil capillary line and
position
so
it
will
not
touch junction box
when it is reinstalled.
(5) See tags and
wiring
diagram
and
connect
wire
leads. Remove tags.
(6)
Replace
(See
(7) Leak
test
newly
connected
joints
and
all
connections
in
the
area.
5-61
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