MAINTENANCE 24.2.8 CHECK AIR CONDITIONER Check twice a year, spring and autumn. Check Levels of Refrigerant (Gas) WARNING If the refrigerant used in the system gets into your eyes or on your hands, it could cause loss of sight or frostbite. So NEVER loosen any part of the refrigerant circuit. Operate the air conditioner system from 5 to 10 minutes. Feel the high pressure side and low pressure side of the compressor. The high side should be hot while the low side should be cold to the touch. Inspect the refrigerant level by observing the refrigerant gas flow (R134a) through the sight glass. Contact your distributor concerning this inspection.
The sight glass is located on the air conditioner drier-receiver, which is located on the right side of the machine and next to the condenser. OPERATING THE AIR CONDITIONER OFF SEASON To lubricate each portion of the air conditioner compressor during the off season, operate the air conditioner for about 3 to 5 minutes once a month. Be sure to idle the engine at low speed for this purpose. WA450-3MC 3-34 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