Toyota Celica 1993 AT200 series Repair Manual page 978

AC-23
AIR CONDITIONING
SYSTEM - TROUBLESHOOTING
6. REFRIGERANT OVERCHARGE
OR INSUFFICIENT COOLIITIG OF COI{DENSER
7.
AIR PRESENT IN REFRIGERATION SYSTEM
C o n d i t i o n : D o € s cool suffici€ntly
Symptom ssen in
reJrigeration system
Probabl€ csus6 Dlagnosis R€medy
Pressur€ too high on
both low and high
pregsur€ srdaa
No €ir bubblgs seen
through th€ sight glass
even when th€ €ngine
rpm is lowered.
Unable to develop sutli-
cient padormance duo to
6xcsSsiv€ rolriggrant in
sy9t€m
Insullici6nt cooling of
condenser
. Excessiv€ r€irigersnl in
cycl6 - r€trig€rgnt over-
cnErg€o
. Condonsor cooling insut-
ticient - cond€nser fins
clogged or t8n molor
lsulty
( 1 1 C l 6 8 n c o n d E n s o r
121 Chcck fan motor oper.
Etion
{ 3 ) l f ( 1 ) a n d ( 2 ) a r e i n n o r '
mrl 8t€to, chock
Emount of relrigsrant
Charge prop€r 6mount
ol rgtrlg€rant
Conditionr Does not cool down suflicisntlv
NOTE: Th€se gsugs indications are shown wh€n th€ ra-
lrigerstion system hss b6on opsn€d 8nd th€ refrig-
erant charged without vBcuum purging.
Symptom 6oen in
refrig€ration system
Probable c6use DiBgnosis Romody
. Pressure too high on
both low and high
pressuf€ srdgs
. The low pressure piping
is hot to ths touch
. Eubbles seen in sight
glass
Air entered in relrigers-
tion systom
. Air pr€s€nt in rgfrig€ra-
tion 8y3t€m
I
. lnsufficignt vEcuum
pLrrgang
( 1 ) Chsck compre880r oil
to s€€ it diny or insufti-
cient
Evscuat€ air snd
charg6 n6w rofriOerant
t2l