Komatsu ecot3 Operation And Maintenance Manual page 132

OPERATION
DETAILED CONTROLS AND GAUGES
Large Capacity Airflow Air Conditioner Blower Switch
(If equipped)
When this switch (12) is pressed, the additional blower motor is
actuated and the air flow from the air conditioner vents increases.
(a) ON: Large-capacity air conditioner blower is actuated
(b) OFF: Large-capacity air conditioner blower is stopped
3 - 75