TEST OR INSPECTION
ICON 23, 25, 27, 26
Use care to prevent refrigerant from touching skin or eyes. Liquid refrigerant, when
exposed to air, quickly evaporates and will freeze skin or eye tissues. Serious
injury or blindness may result if you come in contact with liquid refrigerant.
Refrigerant R-134a air conditioning systems should not be pressure-tested or leak-
tested with compressed air. Combustible mixture of air and R-134a may form,
resulting in a fire or explosion, which could cause personal injury or death.
Wear protective goggles and non-leather gloves when servicing air conditioning or
injury could result.
Temperature of R-134a refrigerant at low-side service value determines system high-side
pressure as indicated in chart shown above.
Ambient temperature of air surrounding air conditioner condenser determines system
high-side pressure as indicated in chart shown above. Ambient temperature is
determined by measuring temperature 2 inches in front of air conditioner condenser.
Stop crew cab air conditioner (WP 0008). Connect service/recycling station (WP 0217).
Start crew cab air conditioner (WP 0008). Check if service/recycling station pressure
gauges cycle between 15 PSI and 40 PSI (103-276 kPa) low-side pressure, and
between 120 and 330 PSI (827-2275 kPa) high-side pressure and air is only slightly
cool (WP 0217).
If service/recycle station pressure gauges do not cycle at 15 PSI and 40
PSI (103-276 kPa) low-side pressure and 120 and 330 PSI (827-2275 kPa)
high-side pressure and air is not slightly cool, go to Step 15.