Komatsu PC220LC -8 Operation & Maintenance Manual page 69

OPERATION
DETAILED CONTROLS AND GAUGES
Hydraulic Oil Temperature Monitor
If this monitor (2) shows low-temperature display (A), carry out the
warm-up operation. For details, see "Hydraulic Equipment Warm
Up (PAGE 3-138)".
Carry out the warm-up operation for the hydraulic equipment until
monitor (2) shows normal display (B).
Display (A) at low temperatures: Monitor background (D) is white
Display (B) at correct temperatures: Monitor background (D) is
blue
Display (C) when condition is abnormal: Monitor background (D)
is red
Fuel Level Monitor
This monitor (3) lights up to warn that the operator that the level in
the fuel tank is low.
When the remaining fuel level reaches approx. 41 liters (10.83 US
gal), the monitor lamp lights up red, so add fuel as soon as
possible.
Charge Level Monitor
This monitor (4) warns the operator that there is an abnormality in
the charging system when the engine is running.
If the battery is not being charged properly while the engine is
running, monitor lights up red.
If monitor lights up red, check the V-belt for looseness. If any
abnormality is found, perform the necessary actions. For details,
see "OTHER TROUBLE (PAGE 3-200)".
Air Cleaner Clogging Monitor
This monitor (5) warns the operator that the air cleaner is clogged.
If it lights up red, stop the engine and inspect and clean the air
cleaner.
For details of checking and cleaning the air cleaner, see "CHECK,
CLEAN AND REPLACE AIR CLEANER ELEMENT (PAGE 4-21)".
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