Whirlpool ATE0743SPP Technical Manual page 61

AN OVERCHARGED SYSTEM
To help confirm an overcharged system, re-
move some of the charge. If conditions im-
prove, the system is most likely overcharged. If
conditions do not improve, non-condensables
(air) are indicated.
Whenever an overcharged system is indicated,
always make sure that there are no airflow
problems. Improper airflow over the evapora-
tor coil may indicate some of the same symp-
toms as with an overcharged system.
An overcharge can cause the compressor to
fail, since liquid refrigerant is entering the suc-
tion line.
The charge for any system is critical. When the
compressor is noisy, and you are sure that
there is sufficient airflow over the evaporator
coils, suspect an overcharge. Icing of the evapo-
rator will not be encountered, because the
refrigerant will boil later, if at all. Gauges con-
nected to the system will usually have a higher
head pressure (depending upon amount of
overcharge). Suction pressure should be slightly
higher.
Overcharged System
6-3