MAINTENANCE 24.2.8 CHECK AIR CONDITIONER Check twice a year: spring and autumn. Check Levels of Refrigerant (Gas) WARNING The refrigerant in the system can injure eyes or skin. To avoid blindness and/or frostbite, avoid contact with the substance; NEVER loosen any part of the refrigerant circuit. Operate the air conditioner system for 5 to 10 minutes, then touch the high pressure portion and low pressure portion of the compressor (or high pressure hose and low pressure hose joint) by hand. At the same time, inspect the flow of refrigerant gas (R134a) through the sight glass to check the level. Contact your distributor concerning this inspection.
The sight glass is located on the air conditioner dryer receiver, which is located on the right side of the machine next to the condenser. 3-38 WA320-3MC COOLER CONDITION NORMAL ABNORMAL Temperature of high and low pressure pipes High pressure pipe is hot. Low pressure pipe is cold. Clear difference in temperature High pressure pipe is warm. Low pressure pipe is cold. Little difference in temperature. Almost no difference in temperature between high and low pressure pipes. Sight glass Almost transparent. Any bubbles disappear if the engine speed is raised or lowered. Bubbles are always flowing. Sometimes becomes transparent or white bubbles appear. Misty substance is flowing.
System line Connections Properly connected Some parts dirty with oil Some parts very dirty with oi General condition of air conditioner Refrigerant level correct, no abnormalities. Ready for use. Could have a gas leak. Contact your distributor for inspection and repair. Almost all gas has leaked out. Contact your distributo for inspection and repair.