DETAILED CONTROLS AND GAUGES OPERATION Auto Switch With this switch (5), the air flow, vents, and air source (RECIRC/FRESH) are automatically selected according to the set temperature. q When auto switch (5) is pressed, the lamp at the top of the auto switch lights up. q Normally, press this switch, then use temperature control switch (3) to set the temperature, and run the air condi- tioner under automatic control. q When the control is switched from automatic operation to manual operation, it is possible to operate the switch to change the air flow, vents, and air source (RECIRC/ FRESH). When the manual control is used, the lamp at the top of the auto switch goes out.
REMARK When Auto Mode is selected, if the set temperature is set to 18.0 °C and 32.0 °C, the air flow is always set to High, but this is not an abnormality. FRESH/RECIRC Selector Switch This switch (6) is used to switch the air source between recircu- lation of the air inside the cab and intake of air from the outside. q When switch (6) is pressed, the lamp at the top of the selector switch lights up to show that air is being blown out. q During automatic operation, the selection of inside air (RECIRC) and outside air (FRESH) is carried out automati- cally. RECIRC The outside air is shut off and only the air inside the cab is circulated.
Use this position to carry out rapid cooling of the cab or when the out- side air is dirty. FRESH Outside air is taken into the cab. Use this position to take in fresh air or when carrying out demisting. Display Monitor Monitor (7) displays the status of temperature setting (a), air flow (b), and vents (c). q When OFF switch (1) is pressed, the display of tempera- ture setting (a) and air flow (b) goes out, and operation stops. 3-38