Komatsu PC220LC -8 Operation & Maintenance Manual page 76

OPERATION
Air Conditioner Monitor
This monitor (8) displays the working status of the air conditioner.
Monitor lighted up: Air conditioner ON
Monitor off: Air conditioner OFF
Idle Stop Guidance
If the levers are not operated for more than five minutes, and the
engine is idling, the idling stop message is displayed on the
monitor. When waiting for work or stopping work for a short
periods, stop the engine to reduce unnecessary fuel consumption.
The idling stop message screen returns to the standard screen
any lever is operated again or when function switch F5 (Back) is
pressed.
DETAILED CONTROLS AND GAUGES
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