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Page Title:
SOLENOID VALVE (COIL REMOVAL).-Continued |
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 TM5-4120-384-14
4-37. SOLENOID VALVE (COIL REMOVAL).-Continued
(4) Use continuity tester or multimeter set on lowest OHMS
scale to check for continuity between pins A and B in each
connector plug.
If continuity is not found, the coil is open and
must be replaced.
(5) Check for continuity between each pin in connector plug
If continuity is found the coil is grounded and
and coil casing.
should be replaced.
(6) If continuity checks are satisfactory, apply 24 volts dc
from an external power supply across pins A and B in connector
Listen for a sharp click when the valve changes position.
plug.
If a click is not heard, internal valve problems are indicated and
Refer to direct support
the entire valve should be replaced.
maintenance.
The only authorized repair to solenoid valve is
b.
Repair.
The coil can be replaced without opening the
coil replacement.
refrigeration pressure system.
Do not attempt any disassembly of the solenoid valve
other than coil removal with a refrigerant charge in
Refrigerant will be sprayed out
the system.
dangerously if the screws that attach the tube and
plunger assembly to the valve body are loosened.
Remove.
c.
(1) Remove top nut that attaches
coil to
the
valve
body.
Remove data plate, coil, and connector
plug.
(2) Cut plastic tie
down
straps
as
necessary
to
remove
solenoid valve cable.
(3)
If
connector
plug
is
to
be
reused
unsolder
it
from
leads.
(4) If
grommet
is
to
be
reused
remove
it
from
defective
coil
assembly.
Installation.
d.
(1) Slip
grommet
over
leads
and
install
in
hole
in
coil
assembly.
(2)
leads
from
coil
assembly
to
connector
plug.
4-110
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