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TM 9-4120-389-14
5-15. SOLENOID VALVE (L1)
For testing and replacement of coil, see para. 5-14.
WARNING
Voltages used can kill. Always disconnect power cord to air conditioner before performing any internal
maintenance. Shutting off at its control module does not disconnect unit power.
Preliminary procedure: Remove top cover (See para. 4-14).
a.
Removal
WARNING
DANGEROUS CHEMICAL
(R22)
is used in this equipment
DEATH
or severe injury may result if personnel fail to observe safety precautions. Use great care to avoid contact with
liquid refrigerant gas being discharged under pressure. Sudden and irreversible tissue damage can result from
freezing. Wear thermal protective gloves and a face protector or goggles in any situation where skin-eye-
contact is possible. Prevent contact of refrigerant gas with flame or hot surfaces. Heat causes refrigerant to
break down and form carbonyl chloride (phosgene), a highly poisonous and corrosive gas.
(1) Discharge the refrigerant system (See para. 5-3).
(2) Remove nut from valve.
(3) Remove and set aside nameplate and coil from valve.
(4) Remove two screws that secure the plunger assembly to the valve body.
(5) Remove the plunger assembly, diaphram and o-ring.
(6) Check valve body for visible damage. Normally valve body replacement is not unnecessary.
(7) If valve body is in good condition, skip steps (8) through (14).
5-36
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