Chrysler neon 1997 Service Manual page 1647

LIQUID LINE PRESSURE DEG. F 180° 140° 160° 100° 120° 200° 80° 60° 40° 150 P.S.I. 500 P.S.I. 200 P.S.I. 250 P.S.I. 300 P.S.I. 350 P.S.I. 400 P.S.I. 450 P.S.I. 100 P.S.I. 50 P.S.I.
24 - 12 HEATING AND AIR CONDITIONING
DIAGNOSIS AND TESTING (Continued)
(6) Install connector boot on switch and repeat
Step 3. If the clutch does not engage, replace the low
pressure cut off switch.
SYSTEM CHARGE LEVEL TEST
The procedure below should be used to check
and/or fill the refrigerant charge in the air condition-
ing system.
WARNING: AVOID BREATHING A/C REFRIGERANT
AND LUBRICANT VAPOR OR MIST. EXPOSURE MAY
IRRITATE EYES, NOSE AND THROAT. USE ONLY
APPROVED SERVICE EQUIPMENT MEETING SAE
REQUIREMENTS TO DISCHARGE R-134a SYSTEM.
IF ACCIDENTAL SYSTEM DISCHARGE OCCURS,
VENTILATE WORK AREA BEFORE RESUMING SER-
VICE.
R-134a SERVICE EQUIPMENT OR VEHICLE A/C
SYSTEM SHOULD NOT BE PRESSURE TESTED OR
LEAK TESTED WITH COMPRESSED AIR. MIXTURE
OF AIR and R-134a CAN BE COMBUSTIBLE AT ELE-
VATED PRESSURES.
POTENTIALLY DANGEROUS AND MAY RESULT IN
FIRE OR EXPLOSION CAUSING INJURY OR PROP-
ERTY DAMAGE.
LIQUID LINE TEMPERATURE
THESE MIXTURES
Fig. 15 Charge Determination Chart
ANYTHING IN THIS SHADED AREA OVERCHARGED
UNDERCHARGED
ANYTHING IN
THIS SHADED
AREA
NOTE: The maximum amount of R-134a refrigerant
that the air conditioning system holds is 784 grams
(28 oz. or 1.57 lbs.)
It is recommended to use the gauges or reclaim/re-
cycle equipment.
(1) Use a manifold gauge and check the liquid line
pressure.
(2) Attach a clamp-on thermocouple (P.S.E. 66-324-
0014 or 80PK-1A) or equivalent to the liquid line
near the filter/drier.
(3) The vehicle must be in the following modes:
• Automatic transaxle in park or manual tran-
saxle in neutral.
• Engine at idle
• A/C controls set to outside air
• Panel mode
• A/C ON full cool
• Blower motor ON high speed
• Vehicle windows closed
(4) Operate system for a couple of minutes to allow
the system to stabilize.
ARE
(5) Observe filter/drier pressure and Liquid line
temperature. Using the Charge Determination Chart
(Fig. 15) determine where the system is currently
operating. If the system is not in the proper range,
reclaim all the refrigerant and recharge per A/C
label.
PROPER CHARGE RANGE
PL