Komatsu PC138USLC Operation & Maintenance Manual page 151

DETAILED CONTROLS AND GAUGES
Stopping Automatic Operation
Press OFF switch (1). Operation stops.
Manual Operation
1. Press fan switch (2) and adjust the air flow. When doing this,
check that temperature setting (a) and air flow (b) are displayed
on monitor (7).
2. Turn air conditioner switch (8) ON.
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OPERATION