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6.24 SUCTION SOLENOID VALVE (SSV)
a. Replacing the Coil
NOTE
The coil may be replaced without removing the
refrigerant.
1. Disconnect leads by unplugging the connector.
Remove snap cap or locknut. Lift off coil. (See
Figure 6-27)
2. Verify coil type, voltage and frequency of old and
new coil. This information appears on the coil
housing.
b. Replacing Valve Internal Parts - - Alco
(See Figure 6-27)
1
2
4
5
6
7
8
9
10
12
13
14
15
16
1. Snap Cap
2. Coil
3. Installation/Removal Tool
4. Enclosing Tube Collar
5. O-Ring
6. Enclosing Tube
7. Spring
8. Plunger
9. Gasket
10. Top Plate
11. Capscrews
12. Spring
13. Gasket
14. Diaphragm
15. O-Ring
16. Body
Figure 6-27. Suction Solenoid Valve (SSV) - - Alco
1. Pump down the unit. (Refer to section 6.3.)
2. Remove snap cap and coil.
3. Remove enclosing tube collar (item 4, Figure 6-27)
4. Check plunger for restriction due to: (a) corroded or
5. Remove top plate, diaphragm spring, diaphragm
6. Install new parts, assemble in reverse order of
7. Torque the four capscrews to 40 inch-pounds.
8. Do not overtighten enclosing tube assembly.
9. Remove supplied installation/removal tool. Install
3
10. Dehydrate and evacuate the system. (Refer to
11. Plug in the connector. Start unit and check
11
6.25 SUCTION MODULATION VALVE (SMV)
a. Coil Checkout Procedure
1. Disconnect the suction modulation valve coil wires
2. Using a reliable digital ohmmeter, test each lead's
3. Setting the digital ohmmeter for low range, check
6-25
using installation/removal tool supplied with repair
kit (item 3).
worn parts; (b) foreign material lodged in valve; (c)
bent or dented enclosing tube.
and body gaskets.
disassembly.
Torque to a value of 1.15 mkg (100 inch pounds).
coil, and snap cap.
section 6.5) Charge unit with refrigerant per section
6.6.1.
operation.
NOTE
When repairing suction modulation valve with
the enclosing tube kit (CTD P/N 14-50021-01)
be sure not to remove items 7, 8 & 10. (See
Figure 6-28) Proper alignment of these items is
achieved only at the factory.
WARNING
Make sure power to the unit is OFF and
power plug disconnected before replacing
the coil.
by unplugging the connector (Refer to section 5).
resistance to ground. If the resistance indicates a
ground short is present, inspect the length of wiring
for damaged or exposed wires. Replace where
necessary.
coil's resistance. If coil's resistance is below five
ohms, replacement is recommended. New coils
have an approximate resistance of 7.6 ohms at 25_
C (77_ F). The chart below gives the resistance of a
new coil at various ambient temperatures.
T-268-07
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