Toyota Hilux Surf 1993 Owner's Manual page 1018

NOTICE:
Always recover refrigerant before removing the parts in the refrigerant line and evacuating air.
•
Evacuate air and charge proper amount of purified refrigerant after installing the parts in the refrigerant line.
•
No.
Hint at 6:
These gauge indications are for when the refrigeration system has been opened and the refrigerant
charged without evacuating air.
AIR CONDITIONING SYSTEM
Condition
Insufficient cooling
•
Bubbles seen in
•
sight glass
Insufficient cooling
•
Frost on tubes from
•
receiver to unit
Insufficient cooling
Insufficient cooling
•
Frost or Large
•
amount of dew on
piping at low pres–
sure side
– Troubleshooting
Probable cause
Insufficient refrigerant
Refrigerant flow ob–
structed by dirt in re
ceiver
Insufficient cooling of
condenser
Refrigerant over–
charged
Air present in system
Expansion valve im–
properly mounted,heat
sensing tube defective
(Opens too wide)
AC–13
Remedy
(1) Check for gas
leakage with gas
leak tester and
repair if necessary
(2) Add refrigerant
until bubbles dis–
appear
Replace receiver
(1) Clean condenser
(2) Check fan motor
operation
(1) Check amount of
refrigerant
If refrigerant is over–
charged
(2) Recover refriger–
ant
(3) Evacuate air and
charge proper
amount of purified
refrigerant
(1) Replace receiver
(2) Check compressor
oil to see if dirty
(3) Remove air in sys–
tem through re–
peatedly evacuat–
ing air
(1) Check heat sens–
ing tube installa–
tion condition
If (1) is normal
(2) Check expansion
valve and replace
if defective