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TM 9-4120-367-14
TM 07592B-14/1
g.
i.
k.
l.
Move any source of heat at least 10 feet from air conditioner.
Is coding action effective?
Air conditioner is
operational.
Check refrigerant.
1. Operate air conditioner for 15 minutes with temperature
control in maximum COOLER position.
2. lnspect Iiquid in sight glass (on back of condenser
section).
Is liquid clear bubble-free?
Use leak detector to find refrigerant leak (paragraph 6.2).
1. Repair or change defective part or repair leak.
2. Charge system with refrigerant (paragraph 6.7 or 6.8).
3. Operate air conditioner for 15 minutes with temperature
control in maximum COOLER position.
Is coding action effection?
Air conditioner is
operational.
j.
Check Liquid Line Solenoid Valve U2 coil.
1. Remove power.
2. Remove top cover, condenser.
3. Disconnect leads from valve coil U2.
4. Measure resistance of coil L2.
Is coil resistance 25 to 50 ohms?
Connect leads.
Change soenoid valve L2 coil.
1. Connect Ieads to new coil.
2. Apply power.
3. Operater in COOL mode with maximum cooler
Is cooling action effective?
High voltage in air conditioner can
kill you.
Check refrigeraor system.
1. Measure ambient outside temperature.
2. Operate air conditioner in COOL mode with maximum
COOLER temperature setting for at least 15 minuites.
3. Measure condenser discharge air temperature which
should be 30 to 40°F (-1 to 4°C) above ambient.
4. Measure temperatures of air going info (return) and out
of (discharge) evaporates section.
5. Discharge should be 15 to 25°F (-10 to -4°C) lower
than return air temperate.
Are temperatures within tolerances?
Air conditioner is
Go to Step k.
operational.
Replace cover.
Go to Step m.
Air condition is
cperational.
4-33
temperature setting.
h.
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