Toyota Celica 1993 AT200 series Repair Manual page 976

AC-21
AIR CONDITIONING SYSTEM - TROUBLESHOOTING
2.
MOISTURE PRESENT IN REFRIGERATION SYSTEM
3 .
I N S U F F I C I E N T R E F R I G E R A N T
C o n d i t i o n : P e r i o d i c a l l y c o o l s a n d t h € n l a i l s t o c o o l
Svmptom seen in
refrigeration svstem
Probable cause
Disgnosig
Remody
During operstion, pres-
sure on low pressure
side sometimes
b e c o m e s 8 v a c u u m
and sometimes normal
Moislu16 antered in re-
lrig€rstion 3ystem
freezes 8t cxpEnsion
valv€ orifice and lempo-
rarilv stops cycle, but
normEl stEt€ is reslored
sfter a tlmg whon ths lco
mells
. Drier in oversStursl€d
state
I
. Molsturo In relrig€rEtlon
system trs€zss sl gxpan-
slon valv€ oritico 8nd
blocks circulttlon of re-
frlg€r8nt
{1} Roplsce recaivar/drief
(2) R€move moistur€ in
cycl6 through roPeat-
ldly ovacu8tlng Eir
(3) Chargo naw r€trigersnt
lo propar amount
Condition: Insufficient cooling
S y m p t o m s e e n i n
refrigeration system
Prob6blo c6us€
D i 6 g n o 6 i 8
R6mody
. Pressure low on both
low snd high pressuro
stdes
. Bubbles s€en in sight
glass continuously
.
nsuflicient cooling pof-
Gss lo6k6go at Bomo
placo in retrig6retion
tem
Insufliciant rof.igerant in
Relrigorsnt leaking
{ 1 )
C h 6 c k f o r g a 3 l e o k a g e
with lssk d6t6ctor and
rspair if nocsssary
C h 6 r g e r o f r i g 6 r 6 n t t o
l l p r e s s u r 6 i n d i c a t g d
v 6 l u o i 3 n o a r O w h 6 n
connoctod to gaug€,
c r 6 a t 6 t h 6 v l c u u m a f -
t o r i n 3 p e c t i n o 6 n d r e -
priring lho localion of
th6 lerk
t2l
( 3 t