Ford Corsar Repair Manual page 787

DISCHARGING, EVACUATING, CHARGING AND CHECKING
Checking Refrigerant Level
CONDITION
Door window: Open
A/C switch: ON
TEMP. lever position: Max. COLD
FAN lever position: 4
Check sight glass after
a
lapse of about five
minutes.
a. The bubbles seen through the sight glass are
exceeds 20°C (68°F). I n higher temperature
influenced by the ambient temperature. Since
the bubbles are easy t o show
up.
the bubbles are hard t o show u p in compara- b. When the screen i n the receiver drier is clog-
tively l o w temperatures below 20°C (68" F),
it
ged, the bubbles w i l l appear even if the amount
is possible that a slightly larger amount o f re-
or refrigerant is normal. I n this case, the outlet
frigerant would be filled, i f supplied according
side pipe o f the receiver drier becomes con-
t o the sight glass. Recheck the amount when
it
siderably cold.
T o o much refrigerant
High-pressure side is ab-
normally hot.
N o bubbles can be seen.
Suitable
High-pressure side is h o t
and low-pressure side is
cold.
Almost transparent.
Bubbles may appear when
engine speed is raised and
lowered.
refrigerant is nearly gone.
lnsuff icient
High-pressure s ~ d e is warm
and low-pressure s ~ d e is
fairly cold.
The bubbles are seen
at intervals o f 1
-
2
seconds.
Almost n o refrigerant
N o clear difference exists between these t w o condi-
tions.
Check item
Temperature of high-
pressure and l o w -
pressure lines.
State i n sight glass.
Almost n o difference be-
tween high-pressure and
low-pressure side
temperature.
Bubbles f l o w continu-
ously. Bubbles w i l l
disappear and something
like mist w i l l f l o w when
Pressure of system.
Repair.
AC256
High-pressure side 1 s ab-
normally low.
Stop compressor !m-
mediately and conduct
an overall check.
AC257
B o t h pressures o n hlgh
and low-pressure sides are
slightly low.
Check for gas leakage, re-
pair as required, replenish
and charge system.
AC258
B o t h pressures o n high
and low-pressure sides are
normal.
B o t h pressures o n high
and low-pressure sides are
abnormally high.
Discharge refrigerant f r o m
service valve of l o w
pressure side.