Toyota Celica Supra 1986 Service And Repair Manual page 727

AC-6
Symptom st-en in
refrigeration system
Preuuret too high at bot h
low and high pressure sides
Symptom seen in
refrigeration system
Preuures too high at both
low and h i~ pressure sid es
Frost or large amount of
dew on piping at low
p ressure side
AIR CONDITIONING SYSTEM- Troubleshooting
5. REFR IGERANT OVERCHARGE OR INSUFFICIENT
COOLING OF CONDENSER
Condition: Does not cool sufficiently
Prob1blt cause
Diagnosis
Remedy
Unable to deYelop sufficient Excessive refrigtrant in cycle
( 1)
Clean conden5er
performance due to exc:es·
~re frigerant
overcharged
12)
Check fan motor
slve reffigerant in system
operation
Condenser cooling
Condenser cooling
{3)
If
(1) and (2) are in
insufficient
insufficient-+ conde-nser
normal
nate,
check
fins clogged or tan motor
refrigerant amount
faulty
Note:
Vent outre·
frioerant through gauge
manifold low presa.re
side by gradually open·
ing
valve.
6. EXPANSION VALVE IMPROPERLY MOUNTED/ HEAT
SENSING TUBE DEFECTIVE (OPENS TOO WIDEI
Condition: Insufficient cooling
Probable cause Diagnosis
Remedy
Trouble in expansion valve
Excmive refrigerant in low
(1) Check hear sensing
tube
or hett sensing tv.,. not
pressure piping
installed condition
installed correctly
I
(2)
If (His
normtl, ten
Refrigerant flow out of
Expansion valve opened too
expansion valve in unit
adjustment wide
form
Replace if defective