Inspect Refrigerant Pressure With Manifold Gauge Set - Toyota Celica 2000 Repair Manual

AC-4
Symptom seen m
refrigeralion sysrern
During operation, P<Bssure on low
pressure side sornetm1es become
a vacuum and somet"11e norma!
AIR CONDITIONING
2.
This is a method in witch the trouble is located by using a man­
ifold gauge set Read the manifold gauge pressure when the
these conditions are established.
Test conditions:
HINT:
It should be noted that the gauge indications may vary slightly
due to ambient temperature conditions.
{ i )
Gauge reading:
Low pressure side:
0.15 - 0.25 MPa (1.5 - 2.5 kgf!cm2)
High pressure side:
1.37 - 1 .57 MPa (14 - 1 6 kgf/cm 21
{2)
Probable cause
Moisture entered · m refligeration
system !roo1es at C_>;pansion valve
orifice and temporarily stops cycle, freezes at expansion valve orifice
but normal state is restored after a and blocks Circulation of relriger·
lime when the ice melts
AIR CONOll JQNING SYSTEM
INSPECT REFRIGERANT PRESSURE WITH MAN-
IFOLD GAUGE SET
•
Temperature at the air inlet with the switch set
at RECURC is 3 0 - 35
Engine running at 1500 rpm
•
Blower speed control switch at nHI" position
•
Temperature control dial at "COOL" position
Normally functioning refrigeration system.
Moisture present in refrigeration system.
Diagnosis
•
Dr"•er in oversalurected state
•
Moisture in refrigeration system
'
'"
· c
(86- 95 .F)
!OlJ67
Remedy
(2}
{1) Replace condenser
Remove moisture in cycle
through repeatedly evacuating air
(3)
Charge proper amount ol new
refrigerant