Toyota Celica 1993 AT200 series Repair Manual page 979

AC-24
AIR CONDITIONING SYSTEM - TROUELESHOOTING
8.
EXPANSION VALVE IMPROPERLY
M O U N T E D / H E A T S E N S I N G T U E E D E F E C T I V E
( O P E N S T O O W I D E )
C o n d i t i o n : I n s u f f i c i e n t c o o l i n g
N O 4 ! 5 2
S y m p t o m s e e n i n
r e t r i g e r a t i o n s y s t e m
Probable cause
D i s g n o s i s Remedy
. P r e s s u r e t o o h i g h o n
b o t h l o w a n d h i g h
p r e s s u r e s r o e s
' F r o s t o r l a r g e a m o u n t
o f d e w o n p i p i n g o n l o w
pressure stde
Trouble in expansion
valve or heat sensing
tube not installed cor-
rectly
Excessive refrigerant in
low pressure piping
r
Expansion valve opened
too wtoe
{ 1 ) Check heat sensing
tube installed condition
l f ( 1 ) i s n o r m a l , c h e c k
expansion valve
Replace il defective
t2l
\,t]l0lt
9 .
D E F E C T I V E C O M P R E S S I O N C O M P R E S S O R
C o n d i t i o n : D o e s n o t c o o l
S y m p t o m s e € n i n
relrigeration system
Probabl€ csuse Oiegnosis
Rem6dy
Pressure too high on
l o w p r e s s u r € s i d e
Pressule too low on
h i g h p r e s s u r e s i d e
. Internal leak in compres-
s o r
Compression defoctivs
.t
Valve leaking or broken,
sliding parts
. R€pair or replace com-
pressor