Electrolux R134A, Service Manual

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stalled, the technician is committed to re-
placement of the drier and a sealed system
repair. Once again, this valve must be re-
moved upon completion of repair. Make
sure the gauges which are used to check the
operating pressures are accurately cali-
brated. When not connected to a system,
the gauge pointer should indicate zero pres-
sure. If necessary, turn the calibrating screw
until the pointer is at "0."
NOTE: NOTE:
NOTE: NOTE: NOTE:
The following situations are typi- The following situations are typi-
The following situations are typi- The following situations are typi- The following situations are typi-
cal, however other factors such as gauge cal, however other factors such as gauge cal, however other factors such as gauge cal, however other factors such as gauge cal, however other factors such as gauge
placement, line voltage and ambient tem- placement, line voltage and ambient tem-
placement, line voltage and ambient tem- placement, line voltage and ambient tem- placement, line voltage and ambient tem-
perature must also be considered. perature must also be considered. perature must also be considered. perature must also be considered. perature must also be considered.
The following symptoms use high and low
side pressures plus wattage measurements
to diagnose sealed system problems. Nor-
mal low side pressure will range from be-
low zero to about six pounds of pressure,
depending on several factors such as refrig-
erator model, ambient temperature, load
and customer usage. Normal high side
pressure is also dependent on external fac-
tors but will range in the 100 to 125 p.s.i.g.
range. Wattage and pressure figures will
vary based on the model and age of the re-
frigerator. Refer to the performance data
table(s) at the end of the manual.
S y m p t o m s S y m p t o m s
S y m p t o m s S y m p t o m s S y m p t o m s :::::
High Side - High Side -
High Side - High Side -
High Side - Near normal pressure Near normal pressure
Near normal pressure Near normal pressure
Near normal pressure
Low Side - Low Side -
Low Side - Low Side - Low Side -
Slightly lower pressure Slightly lower pressure
Slightly lower pressure Slightly lower pressure Slightly lower pressure
W W
W W
Wattage - attage -
attage - attage -
attage - Lower than normal Lower than normal
Lower than normal Lower than normal
Lower than normal
Diagnosis Diagnosis
Diagnosis Diagnosis Diagnosis - Low side restriction. The
evaporator, suction line or other low side
tubing is probably restricted (kinked or
blocked with a foreign article such as mois-
ture or contaminant). This condition is usu-
ally accompanied with a frost build up on
the low side of the restriction. High side
pressure will take longer to balance with the
low side pressure when the compressor is
s t o pp e d.
S y m p t o m s S y m p t o m s
S y m p t o m s S y m p t o m s S y m p t o m s :::::
High Side - High Side - High Side - High Side - High Side - Lower than normal Lower than normal Lower than normal Lower than normal Lower than normal
Low Side - Low Side - Low Side - Low Side - Low Side - Slightly lower than normal Slightly lower than normal Slightly lower than normal Slightly lower than normal Slightly lower than normal
W W W W Wattage - attage - attage - attage - attage - Lower than normal Lower than normal Lower than normal Lower than normal Lower than normal
Diagnosis Diagnosis
Diagnosis Diagnosis
Diagnosis - High side leak. Both high and
low side pressures will drop as more refrig-
erant escapes.
S y m p t o m s S y m p t o m s S y m p t o m s S y m p t o m s S y m p t o m s :::::
High Side High Side
High Side High Side
High Side - Higher than normal Higher than normal
Higher than normal Higher than normal
Higher than normal
Low Side - Low Side - Low Side - Low Side - Low Side - Slightly lower than Slightly lower than Slightly lower than Slightly lower than Slightly lower than n o r m a l n o r m a l n o r m a l n o r m a l n o r m a l
W W W W Wattage - attage - attage - attage - attage - Higher than normal Higher than normal Higher than normal Higher than normal Higher than normal
Diagnosis Diagnosis
Diagnosis Diagnosis
Diagnosis - Low side leak. High side pres-
sure will continually increase since air is
being drawn into the system through the
leak and becomes trapped in the high side
tubing. The low side may show a slight in-
crease in pressure because of the air being
drawn in through the leak.
S y m p t o m s S y m p t o m s S y m p t o m s S y m p t o m s S y m p t o m s :::::
High Side - High Side -
High Side - High Side -
High Side - Lower than normal Lower than normal
Lower than normal Lower than normal
Lower than normal
Low Side - Low Side - Low Side - Low Side - Low Side - In a vacuum In a vacuum In a vacuum In a vacuum In a vacuum
W W W W Wattage - attage - attage - attage - attage - Lower than normal Lower than normal Lower than normal Lower than normal Lower than normal
Diagnosis Diagnosis
Diagnosis Diagnosis Diagnosis - Capillary tube restriction. High
side pressure will take much longer (or not
at all) to equalize with the low side pressure
when the compressor is stopped.
S y m p t o m s S y m p t o m s
S y m p t o m s S y m p t o m s
S y m p t o m s :::::
High Side - High Side - High Side - High Side - High Side - Higher than normal Higher than normal Higher than normal Higher than normal Higher than normal
Low Side - Low Side - Low Side - Low Side - Low Side - Higher than normal Higher than normal Higher than normal Higher than normal Higher than normal
W W W W Wattage - attage - attage - attage - attage - Higher than normal Higher than normal Higher than normal Higher than normal Higher than normal
Diagnosis Diagnosis
Diagnosis Diagnosis Diagnosis - Overcharged system. The
extent of the pressure increase depends on
the amount of overcharge and ambient tem-
perature. An overcharge may also cause the
suction line to be frosted during the run
cycle, resulting in water on the floor after
cycling off.