OPERATOR'S STATION TIPS FOR OPTIMAL AIR CONDITIONER USAGE 7 8 9 10 11 For Rapid Cooling Temperature in the cab may rise over 80°C (176°F) when the machine is exposed to sun light in the summer. For rapid cooling, ventilate air in the cab first. After starting the engine, set the temperature control to maximum cooling (18°C, 65°F) using temperature control switch (9). Then turn circulation mode switch (14) ON (the indicator lights). Select the front/rear/defroster 12 14 M178-01-017 vent mode by operating mode switch (10). Set the blower speed to the maximum flow rate (6 segments lit) by operating blower switch (7). Then, turn air conditioner switch (12) ON (the indicator lights).
After running the engine at a little over 1000 min -1 for a few minutes, press AUTO switch (11) and close the windows. When Windows Become Clouded If the insides of the windows become clouded during rainy weather or on humid days, operate the air conditioner to aid in keeping the windows clear. When the atmosphere is very damp, and if the air conditioner has run excessively, the out- side of the windows may become clouded. If this happens, turn off the air conditioner to adjust the temperature in the cab.
Off-Season Air Conditioner Maintenance To protect each part of the compressor from a lack of lubri- cant, operate the air conditioner at least once a month for several minutes with the engine running at a slow speed during off-season. When the cab temperature is lower than 15°C (59°F), the air conditioner may not operate. If this hap- pens, warm the cab using the heater first. Air Conditioner Sensor IMPORTANT: • Do not suddenly increase the engine speed. • Keep any flames away from the control panel. • Refer to the item “Check Air Conditioner Filter” in the Maintenance Section for main- tenance of the air conditioner filters.
• Always clean the auto air conditioner sen- sor for effective air conditioner perfor- mance. Avoid placing any obstructions around the sensor. M1J1-01-028 1-74