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 TM 9-2320-312-24-1
AIR CONDITIONING SYSTEM GENERAL MAINTENANCE AND TESTING - CONTINUED
0135 00
PERFORMANCE TESTS - CONTINUED
8.
Line Restrictions.
a.
A restricted suction line causes low suction pressure at compressor and little or no cooling. A restriction in a line
between compressor and expansion valve can cause high discharge and low suction pressure and insufficient cool-
ing.
b.
Usually, areas of ice or frost buildup mean a blockage. Parts that often freeze up are probably corroded or inopera-
tive and should be replaced. Parts (such as expansion valve) that freeze up once in a while may do so because of
moisture in system, which will cause the moisture indicator element to turn white or pink. If this happens, notify
your supervisor.
END OF WORK PACKAGE
0135 00-4
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