Air Conditioning - AC1 AIR CONDITIONING AIR CONDITIONING...

AC2810
AC09C–01
AC2811
N11084
Wrong
Okay
LO HI LO HI
– AIR CONDITIONING AIR CONDITIONING SYSTEM
AC–1
1558 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
AIR CONDITIONING SYSTEM
PRECAUTION
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR NEAR AN OPEN FLAME
2. ALWAYS WEAR EYE PROTECTION
3. BE CAREFUL NOT TO GET LIQUID REFRIGERANT IN
YOUR EYES OR ON YOUR SKIN
If liquid refrigerant gets in your eyes or on your skin.
(a) Wash the area with lots of cool water.
CAUTION:
Do not rub your eyes or skin.
(b) Apply clean petroleum jelly to the skin.
(c) Go immediately to a physician or hospital for professional
treatment.
4. NEVER HEAT CONTAINER OR EXPOSE IT TO NAKED
FLAME
5. BE CAREFUL NOT TO DROP CONTAINER AND NOT
TO APPL PHYSICAL SHOCKS TO IT
6. DO NOT OPERATE COMPRESSOR WITHOUT
ENOUGH REFRIGERANT IN REFRIGERANT SYSTEM
If there is not enough refrigerant in the refrigerant system oil lu-
brication will be insufficient and compressor burnout may occur,
so that take care to avoid this, necessary care should be taken.
7. DO NOT OPEN HIGH PRESSURE MANIFOLD VALVE
WHILE COMPRESSOR IS OPERATING
If the high pressure valve is opened, refrigerant flows in the re-
verse direction and could cause the charging cylinder to rup-
ture, so open and close the only low pressure valve.
8. BE CAREFUL NOT TO OVERCHARGE SYSTEM WITH
REFRIGERANT
If refrigerant is overcharged, it causes problems such as insuffi-
cient cooling, poor fuel economy, engine overheating etc.

AC–2
– AIR CONDITIONING AIR CONDITIONING SYSTEM
1559 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
9. SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
The Lexus ES300 is equipped an SRS (Supplemental Restraint
System) such as the driver and passenger air bag. Failure to
carry out service operations the correct sequence could cause
the SRS to unexpectedly deployed during servicing, possibly
leading to a serious accident. Further, if a mistake is made in
servicing the SRS, it is possible the SRS may fail to operate
when required. Before servicing (including removal or installa-
tion of parts, inspection or replacement), be sure to read the fol-
lowing item carefully, then follow the correct procedure de-
scribed in the repair manual.

N20242
Sight Glass
AC2SY–01
I01386
– AIR CONDITIONING AIR CONDITIONING SYSTEM
AC–3
1560 AuthorĂ: DateĂ:
1997 LEXUS ES300 (RM511U)
ON–VEHICLE INSPECTION
1. INSPECT REFRIGERANT VOLUME
Observe the sight glass on the liquid tube.
Test conditions:
S
Running engine at 1,500 rpm
S
Blower speed control switch set at ”HI”
S
A/C switch ON
S
Temperature control set at ”MAX. COOL”
S
Fully open doors
Item Symptom Amount of refrigerant Remedy
1 Bubbles present in sight glass *Insufficient
(1) Check for gas leakage with gas leak de-
tector and repair if necessary
(2) Add refrigerant until bubbles disappear
2 No bubbles present i sight glass None, sufficient or too much Refer to item 3 and 4
3
No temperature difference between com-
pressor inlet and outlet
Empty or nearly empty
(1) Check for gas leakage with gas leak de-
tector and repair if necessary
(2) Add refrigerant until bubbles disappear
4
Temperature between compressor inlet and
outlet is noticeably different