Toyota Camry Manual page 25

2. MOISTURE PRESENT IN REFRIGERATION SYSTEM
Condition: Periodically cools and then fails to cool
Symptom seen in
refrigeration system
During operation, prea–
sure on low pressure
side sometimes
becomes a vacuum
and sometimes normal
3. INSUFFICIENT REFRIGERANT
Condition: Insufficient cooling
Symptom seen in
refrigeration system
Pressure low on both
low and high pressure
sides
Bubbles seen in sight
glass continuously
Insufficient cooling per–
formance
AIR CONDITIONING SYSTEM
Probable cause
Moisture entered in re–
frigeration system
freezes at expansion
valve orifice and tempo–
rarily stops cycle, but
normal state is restored
after a time when the ice
melts
Probable cause
Gas leakage at some
place in refrigeration sys–
tem
– TROUBLESHOOTING
Diagnosis
Drier in oversaturated
state
Moisture in refrigeration
system freezes at expan–
sion valve orifice and
blocks circulation of re–
frigerant
Diagnosis
Insufficient refrigerant in
(1) Check for gas leakage
system
with leak detector and
repair if necessary
1
(2) Charge refrigerant to
Refrigerant leaking
proper arhount
(3) If pressure indicated
value is near 0 when
connected to gauge,
create the vacuum af–
ter inspecting and re–
pairing the location of
the leak
Remedy
(1) Replace receiver/drier
(2) Remove moisture in
cycle through repeat–
edly evacuating air
(3) Charge new refrigerant
to proper amount
Remedy
AC–25