OPERATING THE AIR CONDITIONER 0 Air selector lever a This lever switches the source for the cooling air or heating air. o FRE (fresh air) Fresh air is brought into the cooling system from outside. (This position is used for normal cooling and heating, and when increasing the pres- sure inside the cab.) o REC (recirculate) The air conditioning system uses only the air inside the cab.
(This position is mainly used for cooling or heating the air inside the cab quickly.) Precautions conditioner for using air Handling the air conditioner in season To use the air conditioner com- fortably during its season, ask your Komatsu distributor to check the air conditioner and add the refrigerant if necessary. When cooling, change the air occasionally. l Smoking in the air-conditioned cab will cause your eyes to get sore. While smoking, open the window to let the smoke out of the cab. Handling the air conditioner in off-seasons To lubricate each part of the compressor during the off-seasons, operate the air conditioner for a few minutes two or three times a month.
l While using the air conditioner, open the window once every hour. Be careful not to overcool the cab. The cab should feel cool when entering there from outside (5°C or 6°C lower than the outside temperature). It is not good for the health to have the temperature in the cab too low. Always give careful @Temperature control lever l This lever regulates the tempera- ture when cooling. o The closer the lever is to COOL, the lower the tempera- ture of the air becomes. o The closer the lever is to WARM, the higher the tem- perature of the air becomes. consideration to temperature regulation. W-01282 - 43 -